Exhaust system

10 replies [Last post]
mikemike39
mikemike39's picture
Offline
Joined: 02.11.2006
Location: Suffolk

 

 

 

My 2008 G320CDI has done 50,000 miles and the exhaust system is that supplied when new

I had a look under the vehicle today with a torch, ahead of the MOT shortly

The system is still basically secure although a clamp or two are broken.    The back box is pretty rusty and appears to be slightly leaking, ie if you move the car from cold you can see moisture at either end of that box on the outside of the box

Last year was an MOT advisory

I'm wondering what to do.   I'd imagine MB would offer to supply and fit an entire new system rather than repair a section or two, obviously the whole system includes the CAT, DPF so pretty expensive to renew.

I do have a good mechanic who works on the farm and can do welding etc but I'm wondering what the right way to go is.    Should I even get a stainless system put on - who does that sort of thing on G wagons?    

I'm happy to keep the vehicle forever, I'd be grateful for any comments from those who are more technically minded than me 

Mike

 

Jdring
Jdring's picture
Offline
Joined: 12.04.2004
Location: South of Oxford, UK. 87' 230GE SWB Manual, 89' 230GE SWB Auto, 2012 G350Bluetec LWB
GWOA Groups: Committee, Members
Re: Exhaust system

Hi Mike,

Pretty sure these guys are still doing good work: http://www.stainless-exhaust.com/about-us/ 

If you send them measurements and a diagram of that box.  It should be an easy fit.  I don't suppose there is any issue connecting stainless to original.

Or checkout the MB price for the OEM replacement... might not be that different and then you know it will go straight on.

Personally, I wouldn't bother with welding an old box unless it is to put a patch on a clear hole in it.

It sounds like it might pass again with advisory, but good to know you have to replace at some time.

Another one near Heathrow, with good reviews: https://www.profusioncustoms.com/ 

But you are in Suffolk.  Google 'stainless exhaust suffolk' and you will get a map with several.  Look for one with good reviews and more than 20.

markhowes
markhowes's picture
Offline
Joined: 15.01.2014
GWOA Groups: Members
Re: Exhaust system

Comments here from someone who has no mechanical/technical knowledge - but they may help focus your mind.

So you're going to keep the car "forever" then stainless steel does seem to make sense.

You could look into getting everything after the CAT replaced with stainless steel (the CAT's the really expensive part so why replace if it has many years of life left in it?

Or you could just replace the leaking/rusty box if the pipes to either end are OK. You can get that from your MB dealer and have your farm mechanic fit it. The one you have is 13 years and 50,000 miles old - the replacement should give you plenty of thinking time.

More knowledgeable people than me will be along shortly with better ideas.

edit: - Oh, I see one such person beat me to it.

GWOA Admin
GWOA Admin's picture
Online
Joined: 11.09.2010
Location: Oxford
GWOA Groups: Committee, Members
Re: Exhaust system

markhowes wrote:

edit: - Oh, I see one such person beat me to it.

We roll at a steady pace here on the web GWOA.  A bit less frenetic than keeping track of facebook posts :)

gav.helme
gav.helme's picture
Offline
Joined: 29.04.2011
Location: North Lincolnshire
GWOA Groups: Members
Re: Exhaust system

 

Your decision will be dictated by the condition of the expensive parts up front 

Rear Box and Tail Pipe although not cheap not horrendous 

In front of that....well..... !!!

I would need a ViN to confirm exact prices but all plus vat and ex stock Germany 

Pre Cat £745

Cat £1579

DPF £1499

Rear Box £390

Tail Pipe £180

Personally I'd be sticking with genuine parts and going rear box and tail pipe if needed 

They will last another 10/12 years and then the Cats and DPF will probably need looking at then.....

But hard to say without knowing condition 

gav.helme
gav.helme's picture
Offline
Joined: 29.04.2011
Location: North Lincolnshire
GWOA Groups: Members
Re: Exhaust system

The low mileage is killing it.... presuming that it did the bulk of its 50k early in its life?

Jdring
Jdring's picture
Offline
Joined: 12.04.2004
Location: South of Oxford, UK. 87' 230GE SWB Manual, 89' 230GE SWB Auto, 2012 G350Bluetec LWB
GWOA Groups: Committee, Members
Re: Exhaust system

gav.helme wrote:

The low mileage is killing it.... presuming that it did the bulk of its 50k early in its life?

Yes, I assume short trips mean things never heat up and moisture and condensation just rots through exhaust components.

I once bought middle and rear box from MB USA, who had them shipped to Dallas from Germany and then I picked them up there and hand carried back to the UK.  Half the price but a lot of hassle.  Paid some duty too.

scouse g
scouse g's picture
Offline
Joined: 19.08.2004
Location: liverpool
GWOA Groups: Members
Re: Exhaust system

Try autodoc ?

JASONGDS
JASONGDS's picture
Offline
Joined: 15.07.2011
Location: High Peak
GWOA Groups: Members
Re: Exhaust system

Had a  mount drop an original silencer, local exhaust place made it even worse by trying to weld it took it to a proper exhaust specialist who make 1 offs in SS, did a mint job welded really neatly lasted for ages  , think Tig welded

prwales
prwales's picture
Offline
Joined: 30.05.2007
Location: West Glamorgan
GWOA Groups: Members
Re: Exhaust system

Get a stainless system made up for the car, I've had several made up for G-wagens, petrol and deisel and for a w124, all worked well the one on my ge300 has been on for 15 years, still perfect, nuch cheaper than one from a Merc dealer too

Nick123
Nick123's picture
Offline
Joined: 12.01.2004
Location: Argyll, Scotland
GWOA Groups: Members
Re: Exhaust system
That's us booked in to Lochaber Stainless (Fort William) for late January '22. Because he's good he is always busy. He makes an excellent job.