Help needed - C220 CDi - Exhaust Leak

[paul morgan]

Hi everyone,

Im new here and hoping to pick your brains.

I have a C220 CDi on a 51 plate, and the problem I have is fumes leaking from a strange unit near the exhaust manifold. I am unsure what this unit is as I have searched high and low but cannot find a workshop manual for the car (if anyone knows where I can get one of these I would be eternally grateful).

The unit where the leak is happening is directly underneath the air filter box and next to the manifold. The unit is a square shape with 2 doughnuts on one side with a pipe in the middle of the doughnuts, this unit then connects to the exhaust manifold. It is black with soot and there is a smell of exhaust fumes inside the car when driving the car has also been using more oil than usual.

Any ideas anyone??

 

[Quick Silver]

Hi everyone,

Im new here and hoping to pick your brains.

I have a C220 CDi on a 51 plate, and the problem I have is fumes leaking from a strange unit near the exhaust manifold. I am unsure what this unit is as I have searched high and low but cannot find a workshop manual for the car (if anyone knows where I can get one of these I would be eternally grateful).

The unit where the leak is happening is directly underneath the air filter box and next to the manifold. The unit is a square shape with 2 doughnuts on one side with a pipe in the middle of the doughnuts, this unit then connects to the exhaust manifold. It is black with soot and there is a smell of exhaust fumes inside the car when driving the car has also been using more oil than usual.

Any ideas anyone??

Does the engine sound as if it has noisy tappets when ticking over .If so then it will be leaking injector seals

 

[paul morgan]

No, no funny noises or anything.

 

[television]

Can you see the parts in the link 030 and 190

http://www.detali.ru/cat/oem_mb1.as...&GM=716.640716.647716.651&CT=M&Cat=19U&SID=14

or here

http://www.detali.ru/cat/oem_mb2.as...647716.651&CT=M&cat=19U&SID=09&SGR=075&SGN=02

 

[Nick1964]

Do you mean the turbo by chance?

 

[paul morgan]

looks like the turbo, bummer - it's gonna cost me a fortune thanks for your help!

 

[Nick1964]

Not necessarily, it may just be a split or leak from your boost pipe (usually associated with a hissing sound when driving). Take the hose off the turbo inlet and pinch the impeller centre shaft and see if it has excessive movement in it; a very small amout is OK but if it's like stiring porridge you may need a reconditioned turbo (see if it spins freely). Normally if the turbo is knackered, you will have a very smokey exhaust and high usage of engine oil (essentially you're pumping engine oil into the induction system). If you haven't noticed this, I would think that it's likely to be something less serious. If you're not sure you should take advice from someone that you trust.

 

[MB TECH WARRINGTON]

cats are very common for blocking on these engines. this will cause the clamp to spread and fumes to leak out, check if there is black residue on any of your exhaust clamps, this can indicate blocked cats

 

[MB TECH WARRINGTON]

just re-read your post, sounds exactly like a blocked cat, cant say which one, upper or lower???, your age car wont have a dpf so a decat would be fine,

usually when the cats are blocked it causes injector seals to leak, remove your engine covers and check around your injectors for leakage,

 

[paul morgan]

Thanks both for the advice - I've got a couple of things to try now and I'll let you know how I get on.

 

[deadman]

mb tec,s well clued up , had a simmler problem with the cat no one had a clue what it was ,, go with MB TEC sounds like its the cat, there are no books you can get been trying to get a book or cd for ages, ones on ebay are in German had 3 non ever worked. If any one knows were i can get a book or cd id love to know

 

[bouncer]

If it is blocked cats then a trip on the mortoway is whats needed this should burn the sooty deposits out of the cat, a diesel cat will self clean on a good 70mph blast. Short journy sysndrome will block a cat, never get warm enough to burn of the deposits.

sTeVe

 

[felloffajetski]

Paul Morgan - I have exactly the same issue,

Can I just remove the primary cat core and then put the empty cat back??

I have a 51 plate c220 cdi estate

Thanks