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Thread: Smelly exhaust?

  1. #11
    Member DMitch16's Avatar
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    Quote Originally Posted by mrtibbs View Post
    Hi all. I bought a 2009 Passat Highline Estate 2.0 TDI a few days ago. I have noticed that there is a diesel exhaust smell, very prominent, after driving it a few miles. I haven't had it long enough to do any real research into this issue and just wondered if anyone knew of this problem and what causes it please?

    The car is a 59 reg with 170K miles on the clock and a very full VW service history.
    TIA

    Keith
    One thing to consider would be the band clamp is not sealing between the turbo and DPF connection as this causes leaking exhaust gases to be drawn in via the top bulkhead channel especially if any clips are missing, leaving holes through which the gases can be drawn. This is quite a dangerous health issue as such gases can affect heart arythmia as they did for me a couple of years ago (fortunately no permanent damage and returned to normal
    a few weeks after sealing the leak) so you should identify and resolve the issue as soon as possible. Use of an activated charcoal cabin filter is also recommended.

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  3. #12
    Junior Member mrtibbs's Avatar
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    My local garage have had a look and they have said that they can see soot around the turbo / downpipe clamp and think that is where the smell is coming from. It is booked in next week to have it sorted out, so hopefully that will cure that issue

    Keith
    There are no pockets in a shroud
    2009 Passat Highline Estate 2.0 TDI-CR, DSG

  4. #13
    Member DMitch16's Avatar
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    Quote Originally Posted by mrtibbs View Post
    My local garage have had a look and they have said that they can see soot around the turbo / downpipe clamp and think that is where the smell is coming from. It is booked in next week to have it sorted out, so hopefully that will cure that issue

    Keith
    It is a dry fit steel gasket and some make the mistake of using sealant in addition which actually makes the joint worse once the exhaust pressure pushes it out of the way. It is also not recommended for cars with DPF if fitted. A cleanup of both pipes, a new gasket and a new band clamp should do the trick. Parts around 25 to 30 plus labour of around an hour. Should cost less than 150.

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  6. #14
    Administrator Crasher's Avatar
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    Yes a good flat dry seal with no goo. A Corrado VR6 engine we are rebuilding had distorted exhaust manifolds and a badly corroded head face so we had both manifold surfaces skimmed by Midland Turbo for a small fee (nice chaps) and the head was faced by the engineer who did the guides and face skim, which cost about 30 so with new gaskets, a perfect seal and no bits of sealant stuck in the cat. Attention to detail takes longer but causes far less stress in the long run.
    2003 Skoda Octavia VRS Estate. APR 98RON remap, APR R1 diverter valve, Jetex exhaust, K&N panel filter, 7.5x18 Alutec Monstr wheels with 225/40 18 Uniroyal Rainsport 3 tyres.
    2006 Polo GTI 1.8T, APR 95RON remap
    1988 Golf 2 GTI 16 valve, 2.2 with Weber Alpha injection
    1983 Golf 1 GTI 8 valve, 2 litre with Eurospec racing 42/36 head
    1972 1302LS auto 1641cc conversion

    Vile Invention

    Dark was that day when Diesel conceived his grim engine that begot you, vile invention, more vicious, more criminal than the camera even, metallic monstrosity, bale and bane of our culture, chief woe of our Commonweal. How dare the Law prohibit hashish and heroin yet license your use, who inflate all weak inferior egos? Their addicts only do harm to their own lives: you poison the lungs of the innocent, your din dithers the peaceful, and on choked roads hundreds must daily die by chance-medley. Nimble technicians, surely you should hang your heads in shame. Your wit works mighty wonders, has landed men on the Moon, replaced brains by computers, and can smithy a "smart" bomb. It is a crying scandal that you cannot take the time or be bothered to build us, what sanity knows we need, an odorless and noiseless staid little electric brougham.

    W.H. Auden (1907-1973), A Curse:

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