Shaky V Belt
At tickover my v belt shakes and gives out a horrible noise from below the bonnet, when I put my finger on it to take a bit of strain(without burning my finger), it stops. The rev limiter states approx 500-600 rpm at tickover, at any other higher rpm the shaking stops.
What can I do to stop this? Raise the tickover rpm? Change the belt (I replaced it a year ago, but since then it has had a bit of damadge from the viscouse flying off and going through the rad).
Lightly spray a "little" water on the belt as it rotates and if it subdues the noise its just a squeaky belt
I had exactly the same problem about a month ago. First the powersteering would fail. Secondly the alternator would stop charging. Then the car would all of a sudden start to overheat rapidly..... and the terrible noise!
I had lost the crankshaft pulley that moves the V-belt. Have it checked immediately before it creates more damage!
Regarding your problem with the viscous coupling, did you notice if it felt loose before braking? How loose?
Cheers
Hi Martin, What mileage have you done since fitting the new belt? It may just need some adjustment. A general rule of thumb for v-belt play is a half inch of sideways movement in the middle of the longest stretch. Don't be tempted to over tighten it. Does it sound like a dry squeek? You can buy a v-belt conditioner which comes in a spray can ( don't know what it's called as I've never needed it ) Maybe because of the hot conditions this is what you need. :wink: Cheery the noo Chazz.
I have had a better look this morning at the belt and cannot see where it can be tightened, maybe I am stupid or something :?
The only place I can see is the top where the spring and shocker are, but it looks like it is pre-set. Am I wrong, from what I can see, I need to replace the belt to make sure
I have checked my crank pulley and it is steady as a rock.
I have a noticed a small amount of play in the bottom connection of the damper, I checked it also and there is still a large amount of resistance with it, so I don't think it needs replacing.
The belt is not making any squeaking noises, it is making a shuddering noise and it vibrates approx 3/4" up and down on both long streches from the steering pump to the alternator and from the steering pump to the crank pulley. When ticking over it shudders for 2- 3secs then stops for approx 2-3secs and then again. if I raise the tickover rpm to just 1000rpm then it stops.
Any Ideas?
Martin
The adjustment on the belt is automatic.The pulley wheel is mounted on a spring and keeps a constant pressure on the belt. I replaced mine at 60 000 mile intervals as recommended. The procedure involves backing off the pulley wheel to remove the tension and then replacing the belt.
The vibration you describe might just be a resonant frequency and nothing major. If you felt the puley with the tension off and it was OK then everything else should be OK too, as the pulleys tend to be the weak link. If it disappears as soon as the revs increase it can't be too major.
I am not sure that the idle speed can be adjusted. It is the only electronic devise on the engine , it keeps the revs at 600. I have the same vehicle and have no problem with the belt nor idle speed.
Well, Bad news. I got a new v-belt and tried to fit it today and found that I have a non-MB air condioning unit. The v-belt that was already there was not the same size as the one I had purchased, I checked and double checked the new v-belt I had and I know I have got the correct one. The air cond unit I have is on the left side of the engine and the MB unit is on the right side of the engine, looks like I have to measure the belt I need and get a special. The shuddering on the belt is only on both sides of the steering pump and posibly shuddering more 3/4" to 1" worse on the bottom side than the top side, and only at tickover.
What is also gone, is my steering box, it has always had a small leak(maybe 1/2 litre , 2 months, but now it is quite bad, 3/4 litre fluid a week.
What is the best way to do this, attempt to overhaul it myself or get a replacement? Has anybody had this problem?
If you want to settle the matter of whether your car was factory fitted with aircon, once and for all, you´d better get yourself the datacard of your G.
If your normal MB dealership is not sympathetic enough, I believe that anyone having the MB EPC can get the datacard for you, if you provide him/her with your car´s VIN.
Anyone out there car help?
Thanks,
Seems to me that you need to do 3 things.
1.Replace your steering pump
2.Replace your belt tensioner
3. Replace your belt.
As a rule belts squeek for 3 reasons. 1. They are loose 2 .A component it drives is worn out and running tight 3. The belt has oil on it and is slipping.
Do not spray belts with oily substance if they squeek. sprinkle talcom powder on them for a long term fix.
A slight deflection of a belt at tickover is norm.
Hi Guys,
Well, I got a new belt (2257mm)and fitted it last week and the shaking stopped a little on the top part of the steering pump but shaked even more from the steering pump to the crank. AND the steering box has started to leak a lot worse than ever,
This weekend I removed the steering pump and steering box and found that the bearing in the pump is gone, you cannot feel it when twisted slowley by hand, but when you spin it freely fast, it then vibrates. Today one of my friends leaves for the UK, for a week, and has taken the pump and box for overhaul to Dudley(Engineering Hydraulics) for overhaul 200quid +VAT.
I'll let you know the outcome when I get it back.
Thanks for all you help
Martin.
Glad you have finaly found the problem, but I did refer you to that solution in my last reply, before you replace the belt make sure you clean the pulleys with a evaporating solvent, lake say meth or aceton do not use petrol it leaves deposits. this will remove residues of oil and not transfer them to your new belt also make sure the bottom of the grove is cleaned of rubber debris from years of belt wear.
Thanks Bill,
You are the reason I removed all and checked. I hope when I get it all back and try it, it will finally be fixed and no horrible noise.
Many thanks to all who helped
Martin.
AAAARRRRGGGHHH!!!!!!
This weekend I fitted the NEW steering pump, the overhauled Steering box, the back brake shoes, the drivers side handbrake cable and the drivers door window winder mechanism. Oh, and the back shockers.
AND the belt is still shaking from the pump to the crank in blips of 2-3 second every 2-3 seconds. Bill, the only thing I have to do now is the belt tensioner, do you mean just the spring?
At least after all this, the car feels much better with all the new shocks, and the window doesn't star creeping down every time I hit a bump in the road, AND ye ha, I have a hand brake that works, atlast.
Thanks to all that helped.
Martin.
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Wow!! What a responce.
Yes I tried the water on it last week, I had the same problem with another car I had years ago. I tried giving a bit of lubrication with WD40 and it helps for while (1 or 2 hours).
I will check the crank pulley tomorrow, this sounds scary :shock:
The reason the viscous came off is because I was away in Kazakhstan for the week and the water pump went, so my wife managed to get another pump and get a local garage here(not good) to fit it (BAD MOVE!) I never really checked it after that, until we were playing in the sand dunes one day and I noticed the temp needle rocket the wrong way. I obviously stopped immediately, lifted the bonnet and saw the fan sticking out the rad. The main bolt(allen) had come loose and parted.
I have just had a quick look but can I tighten the belt? How?
Thanks Guys.