W460 / 280GE petrol auto, Performance figures ?

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neilmarton
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Hello,

By accident I hijacked some gentlemans thread whilst enquiring about performance. I am so sorry about that.

So may I start again here and ask some performance questions regarding the G Wagon (W460) 280GE petrol auto.

Does anyone who owns one of these little trucks think that theirs is slow ? (I mean SLOOOOOOWWW!!!!)

Pull away in second obviously and takes beards to reach potential 50mph

Will pull 70mph (MAX) on motorway journey but still slows as it approachs inclines (sometimes down to 55) before moving off again upto its MAX 70.

It is the initial excelleration (well complete lack of it) that makes me curious.

Should it be and are they all slow off the mark. OR is mine experiencing some technical issues which are restricting her performance.

It has a badly bodged exhaust system. I am told she might want new plugs and air filter. (Will doing all this make her go again ?)

What's the verdict from other 280GE petrol auto owners ? Is yours of an acceptable speed/ excelleration ?

Neil.

ErnestTBass
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Re: W460 / 280GE petrol auto, Performance figures ?

The 280ge should easily make 80mph cruise for hours at a time. If your struggling to attain 70 and acceleration is painful slow then you have a problem. Its not a fast beast but neither is it that slow. It will slow down going up hill requiring kick down but its a heaving truck with only 150hp

Check the usual - plugs - timing - plug leads - distributor cap -valve clearances. Then the more difficult stuff - fuel injection - which is difficult these days as very few people have any idea of how to check Bosch mechanical injection without an expensive fishing expedition.
Injectors are quite cheap and not really worth cleaning. The warm up regulator can be tested an rebuilt as can the fuel distributor. Don't be tempted to use  injection cleaner you put into the tank as it can cause crud to come loose and stick in the fuel distributor effectively wrecking it.
Simple things you can do on the fuel injection is change the filter but its probably not the main cause of low power.
If its starting and idling ok when cold I wouldn't suspect the  warm up regulator.
I'd try the simple things first as the injection bit can be a bugger to test and in the end its down to fuel pressure and vacuum.
Be very careful who you let mess the the injection - you need someone who understands Bosch Jetronic injection - but when set up properly it works very well if somewhat thirsty. 

mgrays
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Re: W460 / 280GE petrol auto, Performance figures ?

Not sure a 280GE throttle linkages is completely like a diesel 300GD.. but making sure yoiu have full throttle when your foot is down is a simple starting point.. the 300GD has so much rubber in it that frequently they do not manage this. .. now then you want to complain about slow :-)

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Re: W460 / 280GE petrol auto, Performance figures ?

Mercedes quoted a 0 -100 km/h figure of 14.5 sec and a top speed of 95 mph.  These figure most likely refer to a SWB with a 4-speed manual gearbox.

neilmarton
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Re: W460 / 280GE petrol auto, Performance figures ?

ErnestTBass wrote:

The 280ge should easily make 80mph cruise for hours at a time. If your struggling to attain 70 and acceleration is painful slow then you have a problem. Its not a fast beast but neither is it that slow. It will slow down going up hill requiring kick down but its a heaving truck with only 150hp

Check the usual - plugs - timing - plug leads - distributor cap -valve clearances. Then the more difficult stuff - fuel injection - which is difficult these days as very few people have any idea of how to check Bosch mechanical injection without an expensive fishing expedition.
Injectors are quite cheap and not really worth cleaning. The warm up regulator can be tested an rebuilt as can the fuel distributor. Don't be tempted to use  injection cleaner you put into the tank as it can cause crud to come loose and stick in the fuel distributor effectively wrecking it.
Simple things you can do on the fuel injection is change the filter but its probably not the main cause of low power.
If its starting and idling ok when cold I wouldn't suspect the  warm up regulator.
I'd try the simple things first as the injection bit can be a bugger to test and in the end its down to fuel pressure and vacuum.
Be very careful who you let mess the the injection - you need someone who understands Bosch Jetronic injection - but when set up properly it works very well if somewhat thirsty. 

Yeah I never thought she'd go like the wind but you are correct that she should offer better performance than she does at present !

The wagon has sadly been restored (I use that term loosely) by Roy Rogers !!!

Corners have been cut and mechanics completely neglected ! (half the elctrics are missing I think and at this stage wish not to name and shame the culprits) but a guy says he's gonna do things to help me with the parts so I am hoping he keeps his word.

My main thought is that the exhaust system is a bodge job !

The two manifolds join together into 1 single pipe which is taken to a central square box (This box has 2 ins and 2 outs) then from that central box a single pipe exits from the side (I like the side exit and will be keeping side exit if I need to do anything or renew the exhaust)

I suspect this as being the culprit for no power ?

This poor little truck keeps offering me tears of neglect and cries for help I'm struggling because I do not know mechanics and know not what to do for the best !

Neil.

 

neilmarton
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Re: W460 / 280GE petrol auto, Performance figures ?

Theo wrote:

Mercedes quoted a 0 -100 km/h figure of 14.5 sec and a top speed of 95 mph.  These figure most likely refer to a SWB with a 4-speed manual gearbox.

But i'd guess mine is doing 0-60mph in approx 20-25seconds (I've never really counted)

Tops out at 70-75mph

Would that be standard for a LWB 280GE auto ?

It also does not automatically kick down on inclines ! You can obviously manually pull her back into third and she'll rev and start going. should she do that automatically by herself or are these auto boxes designed to only auto up the gears ? and the driver needs change down when hills are present ?

Neil.

 

neilmarton
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Re: W460 / 280GE petrol auto, Performance figures ?

mgrays

I have noticed that the clown who went a bit ott with the black rubbery spray (in an attempt to make her look undersealed and mint) has covered the bottom section of the throttle ball joint thingy (it exits out the back of the drivers footwell then attached via a joint to a piece which rises upward. that's a bit covered with this black shite ! Should I get a litlle wire brush and clean that up ? It can only help I guess ?

Neil.

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Re: W460 / 280GE petrol auto, Performance figures ?

I own a 280GE auto SWB and find that it has acceptable performance.. it will rev if you gun it in lower gears... and have cruised at 80 and more in the past.... my car is absolutely standard...i have given it a full service, including plugs and leads,distributor cap and rotor arm.. new vacuum pipe from brake servo to injection system.. (only £7 from MB main dealer.).. also has valve clearances done and timing and mixture set... it has smooth gutsy acceleration... and i have no complaints except for its a  little mechanical over 50mph...  my exhaust is standard... and the air filter was in good nick... the car is very susceptible to poor performance if your  vacuum pipes have leaks in them... check all of this including vacuum pipe to gearbox....and check the kickdown switch isn't covered with aftermarket mats mine was and wouldn't kick down till i trimmed it...   you didnt say if yours was a LWB... which would be heavier than mine...and would give lesser performance....

whats the mileage?

are you sure you are in 2wd?   if you are in 4wd you will struggle to go fast!

 

good luck.... keep looking.... never give up!!

Theo
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Re: W460 / 280GE petrol auto, Performance figures ?

A 240GD with 70hp has a top speed of 70 mph, in other words you are 80 hp short;  I doubt that is caused by the exhaust system.
 

neilmarton
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Re: W460 / 280GE petrol auto, Performance figures ?

Hi John757,

Yours sounds how I would like mine to be !

Yes she is LWB (so will not quite keep up with your lean mean sawn off machine !)

Mileage over life span is 140k (But she had a new engine fitted at 70k so this current motor has only covered 70k)

She's only just run in surely ?

I will not give up coz I love her. (many many people have made rude comments and questioned my sanity and my tastes) She's here for keeps and I am happy to spend a few bob but don't sadly have deep pockets (if i did i'd have bought a new brabus 700bhp one) so this will be a game of softly softly catchy monkey.

Everytime I take her out some arse hole delights in showing me another problem ! Today it was discovered that the fan infront of the radiator is not working !!! Terrific huh ?

If it's got tits or tyres it's trouble !!!

neil.

 

 

neilmarton
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Re: W460 / 280GE petrol auto, Performance figures ?

Theo wrote:

A 240GD with 70hp has a top speed of 70 mph, in other words you are 80 hp short;  I doubt that is caused by the exhaust system.
 

Yeah not sure that mathematic equation is strictly scientific ?

I'll agree she's lacking power somewhere somehow but 80 gee gee's gone missing nah ! I am gonna find a good nurse who will help offer her the correct medication (at NHS prices I hope coz those BUPA dealerships are outta my league) and cure her of her minor ailment !

Neil.

panzer
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Re: W460 / 280GE petrol auto, Performance figures ?

Fan in front of the radiator? Should there be a fan in front of the radiator on a 280 GEL?

Only been in a 280 once and it did not strike me as slow even with 4 up.

Good luck getting it sorted

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Re: W460 / 280GE petrol auto, Performance figures ?

The fan in front of he radiator is he air-conditioning fan for the condenser. It will only operate if the a/c is on or if the engine gets to a certain temperature.

Sounds as if your 280GE has some issues, but with a bit of time and care, they can all be sorted.

neilmarton
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Re: W460 / 280GE petrol auto, Performance figures ?

panzer wrote:

Fan in front of the radiator? Should there be a fan in front of the radiator on a 280 GEL?

Only been in a 280 once and it did not strike me as slow even with 4 up.

Good luck getting it sorted

Hi Panzer,

Yep there is a fan between the front grille with the big merc emblem and the radiator. It cuts in to cool the rad I assume. If it shouldn't be there then it was a crazy elaborate attempt at aesthetic enhancement !

Mine is definately slow. My quest to recover the power is now on !!! I do love her to bits but she's cheesed me off today with all her ailments !!! perhaps she has "G"bola !!!

Neil.

neilmarton
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Re: W460 / 280GE petrol auto, Performance figures ?

Hello Arnie,

Yep she is poorly. Just a mild case of "G"Bola !!! I will nurse her back to health and she'll be a peach. Cosmetically she's beautiful.

Oh so it's the air con fan is it. Yep I do have the diavia aircon unit below centre console so if I switch that on the fan should begin to turn yeah ?

But when I drove her to the nurse today (It was hot today) she was proper scorching hot and slowly bubbling from the radiator cap !

Oh nuts the "G"Bola is getting worse !

I'd love to take it somewhere and say fix everything money no object. But as I say !I can afford anything I want" BUT "I can't afford everything i want" !!!

She's gonna need hang in there while i save my pennies.

 

ChrisG
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Re: W460 / 280GE petrol auto, Performance figures ?
If you give it full throttle from a standing start what revs does it reach before changing up? Have you fitted monster truck tyres? And had you checked the coolant level before the trip that caused bubbling from the radiator cap?
ErnestTBass
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Re: W460 / 280GE petrol auto, Performance figures ?

How much work can you cope with yourself?

Have you got the 280ge manual? Should be available to members.

Plugs, wires distib cap and valve clearances can all be done easily (a merc tool is best to adjust them) - to remove the plug wires use a tool to prevent wrecking the leads.

Have you checked the air filter condition?

I wouldn't have thought the exhaust is causing a huge problem - mine was in a terrible state untill I got it replaced with a side exit stainless steel one but the improvements were in idle and emissions settings.

You can make a rough check for vacuum leaks by getting it warm and let it idle then place your hand over the inlet pipe on the air filter. If it slows right down and stalls there is not a huge amount of leaking (the pipes to the air flap need to be sound and not leaking for this to work)

Timing requires a timing light but its easy to adjust - I run mine at 34 before @ 3000rpm I find that gives a bit more power and on regular fuel here it should be ok - not had any problems so far

You can take the inlet pipe off the air intake to the engine and check if the air flap moves smoothly without sticking - cleaning around it is a good idea. If its sticking then the engine will not get enough air - try revving it up and watching to see if it goes down smoothly.

 

Changing the injectors is not too hard and if they have never been done it might be worth while - to test them with the pump required is probably more expensive than new injectors and it should only take a couple of hours. The injection pipes have to come off both the injectors and fuel distributor but its not complicated.

 

If you want to go the hole hog and re-build the injection and vacuum system then remove the inlet manifold - take off the fuel distributor and warmup regulator and the all the pipes and clean them out.

Send or take preferably them to http://kmipetrolinjection.co.uk/Bosch%20K-Jetronic.htm to test and rebuild if needed. Ive used him and he knows what hes doing.

replace all the rubber pipes under the manifold.

That way you will have a fully functioning injection system - get the emissions checked on a machine.

This will be way cheaper than taking into a garage and open your wallet and say help yourself.

The 110 engine an Bosch K jetronic injection is pretty reliable and even if really out of whack will normally get you home. There is plenty of info out there on the injection and its not rocket science - just fuel pressure and vacuum. I did mine after years of poor running - and saved a fortune.

 

The only other part to go could be the ignition module or coil itself - a go on an engine analyzer would show that I guess.

good luck

neilmarton
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Re: W460 / 280GE petrol auto, Performance figures ?

ChrisG wrote:
If you give it full throttle from a standing start what revs does it reach before changing up? Have you fitted monster truck tyres? And had you checked the coolant level before the trip that caused bubbling from the radiator cap?

Hi Chris,

Uhm not sure about the revs buddy. I will check this out when she comes back from my friends place (he is doing some little tiny welding jobs within the innner skin wheel arches. Not absolutely necessary but I have an obsessive nature and become crazy OCD about little things)

I did not check the coolant level. do you think she may have been to full or to empty ?

No I have not get anything fitted other than the clothes she wore from birth ! (absolutely factory standard)

 

neilmarton
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Re: W460 / 280GE petrol auto, Performance figures ?

ErnestTBass wrote:

How much work can you cope with yourself?

Have you got the 280ge manual? Should be available to members.

Plugs, wires distib cap and valve clearances can all be done easily (a merc tool is best to adjust them) - to remove the plug wires use a tool to prevent wrecking the leads.

Have you checked the air filter condition?

I wouldn't have thought the exhaust is causing a huge problem - mine was in a terrible state untill I got it replaced with a side exit stainless steel one but the improvements were in idle and emissions settings.

You can make a rough check for vacuum leaks by getting it warm and let it idle then place your hand over the inlet pipe on the air filter. If it slows right down and stalls there is not a huge amount of leaking (the pipes to the air flap need to be sound and not leaking for this to work)

Timing requires a timing light but its easy to adjust - I run mine at 34 before @ 3000rpm I find that gives a bit more power and on regular fuel here it should be ok - not had any problems so far

You can take the inlet pipe off the air intake to the engine and check if the air flap moves smoothly without sticking - cleaning around it is a good idea. If its sticking then the engine will not get enough air - try revving it up and watching to see if it goes down smoothly.

 

Changing the injectors is not too hard and if they have never been done it might be worth while - to test them with the pump required is probably more expensive than new injectors and it should only take a couple of hours. The injection pipes have to come off both the injectors and fuel distributor but its not complicated.

 

If you want to go the hole hog and re-build the injection and vacuum system then remove the inlet manifold - take off the fuel distributor and warmup regulator and the all the pipes and clean them out.

Send or take preferably them to http://kmipetrolinjection.co.uk/Bosch%20K-Jetronic.htm to test and rebuild if needed. Ive used him and he knows what hes doing.

replace all the rubber pipes under the manifold.

That way you will have a fully functioning injection system - get the emissions checked on a machine.

This will be way cheaper than taking into a garage and open your wallet and say help yourself.

The 110 engine an Bosch K jetronic injection is pretty reliable and even if really out of whack will normally get you home. There is plenty of info out there on the injection and its not rocket science - just fuel pressure and vacuum. I did mine after years of poor running - and saved a fortune.

 

The only other part to go could be the ignition module or coil itself - a go on an engine analyzer would show that I guess.

good luck

 

Hello Ernest,

WOW your a man who knows these little trucks like the back of your hand obviously !

I have no knowledge at all ! None what so ever !

She is the little truck I dreamt of owning as a child and I scrimped and saved to buy one for my own. I looked for a year before choosing to buy this one (The most that I had viewed were dogs and seriously unwell. I even one which had undergone "Complete restoration" as the advert said. When I got there she had been painted a nice gold color and looked pretty. When I opened the rear door the bottom of it had been all covered up with masking tape and sprayed over !!! This was on two other doors also !!! a complete waste of paint !!!)

She will now remain with me for the long haul and i wish to make her right ! I will cure her "G"Bola soon. I just do not know which medication she needs and cannot afford the BUPA route so needing do things on the NHS !!!

I need a guy like you next door as it sounds like you can help me immensely but I think your accross the pond ? would have been handy if it was surrey england ! (just down the road then)

I hope to meet with a guy who lives close to me in T,wells but am struggling to make contact with him at present.

She'll be right soon enough but I can't do it myself because I am a wood butcher (cabinet maker) with absolutely no knowledge greater than fuel in and turn key. If that fails then i'm stuffed !!!

She needs her power back.

Cheers,

Neil.

 

ChrisG
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Re: W460 / 280GE petrol auto, Performance figures ?
Neil you're doing the right thing in trying to get help! When it comes back check the coolant level before you drive anywhere. I very much doubt it was too full but could well have been too empty and you will cause major damage if you let it seriously overheat. Only once you're sure about the coolant see what revs she changes at under 'kickdown' conditions and report back. It may be that she's changing far too early . This is adjustable. Also as mentioned earlier, check you're getting full throttle. There are nylon wheels in the throttle linkage that can break up. BTW Our local mercedes dealers will diagnose any fault for a maximum charge of one hour labour. Yours may have a similar deal. On no account let them do the repair but in my experience it can be money well spent to learn what actually needs doing. KIT. Just went out to my truck to remind myself how many places there are in the throttle linkage that can fail and mine isn't getting full throttle!! Nothing like! Just shows you. I thought the fuel consumption had improved!
neilmarton
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Re: W460 / 280GE petrol auto, Performance figures ?

I will definately check coolant levels when I go collect her.

I am thinking I have got some major vacuum issues ??? She doesn't kick down !!! If I stand on the throttle she don't kick down.

will if I pull the shift back to third but not all on her own as she should !

Pulls away and changes up. but if you gun it it does not kick down. Just very very slowly vibrates and shakes as she attempts to build speed in the high gear !!!

Vacuum issues huh ?

Neil.

(And thank you for your kind words of encouragement. YES I believe I am doing the right thing. i will make her mint and she'll become a long term member of our family)

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Re: W460 / 280GE petrol auto, Performance figures ?

150 bhp in the ge280 is a very conservative figure, the same engine delivered 185 in an w123 280e, I'm not sure the compression is different or whether its a cam change or even if its just an understated figure but these engines rev freely and never feel slow. The only real issue that should concern you is fuel consumption.

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Re: W460 / 280GE petrol auto, Performance figures ?
Ive always understood that the compression ratio was lowered so's the G would run on poor quality / low octane petrol?
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Re: W460 / 280GE petrol auto, Performance figures ?

Yes the compression is dropped compared to the standard engine. An easy upgrade is to swap the car engine into a G. Plenty around and easy to re-ring them

neilmarton
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Re: W460 / 280GE petrol auto, Performance figures ?

I would rather not yetexplore the new engine swap.

Currently the engine is original and has covered only 70k (the cock reads 140k but i have confirmation of a new factory fitted merc engine carried out under warranty i believe due to oil loss at 70k)

I think my little truck has problems with the vacuum system. (she has been sat for 10years unused)

What it is it's gonna plenty of time and money to rectify by the sounds of things !!!

Bummer !!!

But it'll get done somehow guys.

Neil.

 

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Re: W460 / 280GE petrol auto, Performance figures ?

Parts for the vacuum system (tubes, connectors, one-way valves, tees etc) are all very cheap. Just time is the main cost here.

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Re: W460 / 280GE petrol auto, Performance figures ?

  the vacuum valves are not cheep i bought a set of 3

      from my local mb dealer last year if i remember correct

       about 300 gbp

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Re: W460 / 280GE petrol auto, Performance figures ?

Just bought a set for a 463 at between £2  and  £7 each.

Maybe we are talking about different 'valves' ?

 

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Re: W460 / 280GE petrol auto, Performance figures ?

    1 for the aulto gearbox   1 for the IP   AND 1 FOR THE TOP OF ROCKER BOX

     AS WHEN NEIL SAID HE HAS NO KICK DOWN IT WILL BE THESE

     IF HE IS LUCKY IT WILL BE THE SWITCH ON THE FLOOR BEHIND

       THE PEDDLE   OR A LEAK  IN THE PIPE WORK

neilmarton
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Re: W460 / 280GE petrol auto, Performance figures ?

Hi Adrian,

You have been nothing short of a true gent toward me as a new comer and complete novice (sometimes idiot) with my "G"Bola issues.

You don't live to far away from me. Maybe one day I can come see you and you can point out all her health issues ?

I'll buy you a cup of coffee and sticky bun ! How's that sound ?

Neil.

cox.adrian
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Re: W460 / 280GE petrol auto, Performance figures ?

V  hi Neil 

 
     AHHH  I HAVE A  MEDICAL  CONDITION  THE COLD
     I LIVE IN THAILAND MOST OF THE TIME
     ADRIANS WINTER TIME IS SEPT / JUNE
     I WILL DROP YOU A PM OR EMAIL WHEN I GET MY
     FLIGHTS SORTED AND SURE LOVE TO MEET UP
     SOUNDS LIKE A PLAN TO ME LOOK FORWARD TO IT
      STICKY BUNS wink HOW CAN I SAY NOyes  ADRIAN   
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Re: W460 / 280GE petrol auto, Performance figures ?

neilmarton wrote:

I will definately check coolant levels when I go collect her.

I am thinking I have got some major vacuum issues ??? She doesn't kick down !!! If I stand on the throttle she don't kick down.

will if I pull the shift back to third but not all on her own as she should !

Pulls away and changes up. but if you gun it it does not kick down. Just very very slowly vibrates and shakes as she attempts to build speed in the high gear !!!

Vacuum issues huh ?

Neil.

(And thank you for your kind words of encouragement. YES I believe I am doing the right thing. i will make her mint and she'll become a long term member of our family)

hey mate... i feel your pain... re the kick down issues... look under the accelerator pedal ...there is a small switch...that instigates kick down when depressed... if its covered in a mat or carpet it will not work...

next there is a vacuum pipe that runs from the engine bay just under the intake manifold that runs all the way down to the gearbox...and loops around there until it goes under a metal plate to protect it... that tells your gearbox how much throttle you are giving it...and gives you the gears.... if thats split or blocked...that will cause you issues... easy fix...

 

hope this  addresses some of your issues....    i have spent the last 6 months getting to know my G with all her faults....

 

hope this helps....

neilmarton
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Re: W460 / 280GE petrol auto, Performance figures ?

I've also noticed that on a recent 1hr drive to a friends she had over heated when destination was reached.

the temp gauge didn't tell me just when i lifted bonnet steam appeared from lid on rad. It might just be lowon coolant and perhaps it leaks ?

It might be sinister ?

the auto box kickdown definately doesn't work automatically. can push her back to 3rd for a bit more revs and power.

i think i've found a local nurse (old school mechanic) who is willing to check her out and offer his diagnosis

The G saga begins !

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Re: W460 / 280GE petrol auto, Performance figures ?

The cooling system should operate under pressure when hot (up to 2 bar, or 30 PSI). It might just be that you need a new radiator cap. If properly pressurised, the coolant will not evaporate or boil, until 120C or higher.  However, under normal driving, you would not expect the temperature to go beyond 95 C and if it is actually running much hotter than that, it could be a problem with a partially blocked radiator or faulty thermostat that is not opening properly.

See how it goes with a new radiator cap and new thermostat, but I would plan for a cooling system overhaul, with new or re-cored radiator, new water pump and new hoses. Sooner or later, all cars need this. It goes both with age and mileage.

 

The issue with the kickdown could be as simple as a fuse, or a faulty kickdown switch or wiring. Otherwise, the kickdown solenoid on the gearbox can be investigated.

neilmarton
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Re: W460 / 280GE petrol auto, Performance figures ?

Hello Arnie,

thank you for once again jumping to my aid (you do seem to be very knowledgeable about my troublesome little truck)

It says on your profile that you are london based. would it be rude to ask whereabouts in London ? maybe i could meet up with you one day and you could set me straight on a few of my issues ? It would be nice to know what the hell I am facing really ?

Many thanks,

neil.

 

Arnie
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Re: W460 / 280GE petrol auto, Performance figures ?

PM sent

John757
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Re: W460 / 280GE petrol auto, Performance figures ?

Neil

I can recommend this guy from P&R Autos Guildford Surrey. Contact Paul on 01483 234004

he worked on G wagons for MB for 35 years.....  from when they were new... he should help you.. and he is very reasonably priced. what he doesn't know about them you can write on a stamp.

 

Good luck

 

John

 

neilmarton
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Re: W460 / 280GE petrol auto, Performance figures ?

Nice one John !

there ain't many of these guys around ! I have searched and searched and spoken with people who say yeah mate we used to look after one for a farmer up the road (But I aint getting the feeling of confidence just the feeling that they will lash it up and dip my pokets)

Perhaps i'm harsh and synical ? but believe me the automotive industry functions and practices in this manner !!!

Thank you kindly for the heads up on a good un !

neil.

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Re: W460 / 280GE petrol auto, Performance figures ?

I've used him twice....and another member on here.... he solved my poor running issues...and did my valve clearances (couldnt find anyone else who knew how to do them) with his Vast experience and knowledge of the G Wagon....   he has the special tools and knowledge required to fix them as well..... 

 

  Good luck

 

John

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Re: W460 / 280GE petrol auto, Performance figures ?

Hmmmmmm Dr. Spider1V's Prognosis;

A very sad case when a G owner has performance issues. Not getting it up ( a steep hill), no hard acceleration, and very slow perfomance (to 60) wink. Why not get a nice old 55 engine and drop one in? Get the best of all worlds , beter MPG, MPH, oodles of power - prob 0-60 in about 5-6 seconds and top speed well above the UK legal limit. Women begging you to have their babies and men looking on in envey.....and above all that lovley rumble of a V8?

Not up for that?

Take a look at:

Fuel pump
All shafts, bearings, boxes etc well lubricated
Radiator cleaned of any mud out of the grille
New sparks
New leads
Check that the air con is in the 'off' position. (We had a member driving in his G55K with his aircon on all the time! did not know he could turn it off)
 
I did this for my 500 and it certainly made a difference.
 
Exhaust next
 
HTH
Spider1V
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Re: W460 / 280GE petrol auto, Performance figures ?

Spider,

I'll check the later first !

BUT you got me interested. So where do I find a "nice old 55 engine" ? and you make "just drop it in" sound so very simple !

How do I just drop her in ? sounds like a mission and perhaps a trumpy one ? (not much cash on the hip at present)

Neil.

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Re: W460 / 280GE petrol auto, Performance figures ?

Neil,

Good question. I am not the most technically gifted G driver, but with all the conversion on diesels, am assuming that it would be slightly easier, as there are no turbo's and complicated gubbin's like wot a diesel has. I remember a while back someone (Tony Baskill??) put a 5.6 into a SWB G - V nice!

Drop Sing G a PM and ask, he would know. Failing that maybe drop Gordon O (Evil Northern Rep laugh) a note, he does a number of conversions he could give you and idea or even Scouse G - they could give you a rough idea?

Sorry if I got you all excited... wink

Spider1V

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Re: W460 / 280GE petrol auto, Performance figures ?

It coulddo with a 5.6 !!!

Just got her back today from my metal worker pal and he has now closed up the holes in the inner wheel arch skins (caused by surface water spraying up off the tyres)

But she still does not kick down. It is not the switch covered up. that is fine and i can feel the peddle actually press it so fear a vacuum system fault/problem ?

Lots to do before she's healthy again !

montreal
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Re: W460 / 280GE petrol auto, Performance figures ?
Just saw your posts. I've had 3 merc's with the 280 engine including a 280 lwbG. Try all the other things already mentioned but get the exhaust sorted..they don't go well without a perfect one.you could also use a lead replacement/ octane booster in every tank..it works and makes them run much smoother.i use one by Castor as Wynnstay was too pricey per litre mixed. Also I think there are filters in the fuel distributor that can restrict the fuel coming in.careful when undoing the banjos..very high pressure fuel here. That's it
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Re: W460 / 280GE petrol auto, Performance figures ?
I meant to say Castrol and clean out the little filters if it has them..good luck
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Re: W460 / 280GE petrol auto, Performance figures ?

I believe all 280e engines had hardened valve seats, so a lead-substitute additive is not really necessary. However, they are tuned for high-octane fuel (RON 98), but a cheaper octane-booster alternative to additives may be just to use Shell Optimax or BP Ultimate etc, which are between 98 and 100 RON. You will get slightly more MPG with these fuels, which will offset their higher cost.

neilmarton
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Re: W460 / 280GE petrol auto, Performance figures ?

When I have got her new plastic tank conversion fitted (kindly supplied by Adrian) I will give her a drop of the good shit !

But yep all of the above needs be done and sorted.

Vacuum system is causing me concern. Exhaust pipe is causing me concern. I checked yesterday and the radiator cap is loose and wobbley so I don't think i have any problems just need a new cap ? where can I get one ?

Electrics need sorting. she's got a bad dose guys but i ain't giving up just yet.

I do fear she will eat money and do not want to end up with her sat in a garage every bloody week with great big bills and still poorly. I maybe sinical but all garages will say "yeah we can help we'll sort it it's this and this and it costs this" yep and i pay it then come back next week to be told "hmmmm actually now that's done we need do this n' this and it costs this" and so the saga continues ! I don't want that !

 

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Re: W460 / 280GE petrol auto, Performance figures ?

 I DON'T KNOW MY SELF IF THE GEARBOX VACUUM VALVE IS THE SAME ON 

  YOURS AND MY G HOPE SOME ONE WILL TELL US

   HOPE SO AS I HAVE ONE IN THE BACK OF MY G YOU CAN HAVE

neilmarton
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Re: W460 / 280GE petrol auto, Performance figures ?

Thank you again Adrian ! Maybe i'll need that. Dunno really. I'm a bit punch drunk with all of it and running around not really knowing what to do for the best. I'm pleased to see her back home.

Do you know what the black rubbery paint is that is applied to the underneath ? As you know i had a metal worker close up some old holes within the inner wheel arch skins and I need now paint them over. he's made a good job of it and once blacked over don't think anyone would know it'd been done. (perhaps i'm making progress already)

Cheers chief !

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Re: W460 / 280GE petrol auto, Performance figures ?

I wouldn't be too fixated on the lack of kick down yet. IMHO your lack of performance sounds like either or both of the following:
First one and most likely. Vacuum leaks, split or even disconnected hoses. These also affect the operation of the gearbox. Trace them all and I'm sure you will find some of the rubber connectors perished. As a process of elimination you can tape them up with decent electrical tape.
The setup of the CIS injection. This is great system when correctly set-up and is actually a pretty simple system. Do some research online and as has been mentioned find someone who isn't in the plug and play generation.
Don't loose heart, you're correct about the motor trade unfortunately but with some knowledge these are pretty basic machines.

And I maybe wrong but the 280's in G Wagens were low compression so will run on 95?

 

Oh and tracing vacuum leaked.
With the engine running spray carb cleaner or maybe WD40 around. When the engine note changes you've found a leak.

 

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Re: W460 / 280GE petrol auto, Performance figures ?

I've just glanced through the thread, and unless I've missed it I don't see anything to indicate that you've completed a basic service yet.
No matter what the previous owner told you I would complete this before you do anything else.
Oil
Filters. Fuel, air, oil.
Plugs
Leads
Distributor cap.

You can get these online from opie oils or Euro car parts. Maybe £70 total.
Without this complete you've not got a bench mark to start from.

 

I'd also change the auto box fluid and filter as well.