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Exhaust smell in cabin

J

jkells

Ready to race!
GTI MK6 Stg2 +.

Only recently started happening. Weird exhaust smell inside the cabin. Now I know the air comes through the air ducts near the rain guard into the cabin but I still don't know where the smell is coming from... I have done research and found out it could be anywhere from the turbo to the intake manifold to the exhaust. But I don't have a vacuum leak anywhere. Help?

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J

jkells

Ready to race!
And maybe it is just me, but I only smell the exhaust when accelerating. When I'm completely stopped I don't smell it anymore.

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Laimface

Laimface

Ready to race!
Carbon monoxide from leaky exhaust is a killer!! Get your joints checked asap.
 
vwrabid

vwrabid

Ready to race!
Technically, carbon monoxide is odorless.
Personally, I adore the smell of my sweet catless exhaust as it wafts up from behind me after stopping at an intersection. Windows down. Sun roof open.

But yeah, if your getting any "gasses" through the ventilation. It has to be a leak up front and under somewhere.

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lilonespaz

lilonespaz

Drag Race Newbie
vwrabid said:
Technically, carbon monoxide is odorless.
Personally, I adore the smell of my sweet catless exhaust as it wafts up from behind me after stopping at an intersection. Windows down. Sun roof open.
Click to expand...


ME too. Love pulling up to a stop light and then a few seconds go buy and the exhaust catches back up and i get a hint of fuel.


But OP i would get it looked into if its happening all the time could make you sick.
 
J

jkells

Ready to race!
FriggenT said:
Check for leaks, put a shop vac set to blow in the exhaust and plug the other pipe off, get soapy water and start spraying at th e turbo and on back...you also could have a broken flex pipe.

https://vimeo.com/196702805
Click to expand...
I was thinking of the exact same problem. Already checked everything else in the engine bay. And this makes sense as if there is a leak here, the gasses will rise up and the air intake vent is right there.

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F

FriggenT1

Banned
jkells said:
I was thinking of the exact same problem. Already checked everything else in the engine bay. And this makes sense as if there is a leak here, the gasses will rise up and the air intake vent is right there.

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Click to expand...

Do you have aftermarket motor mounts? If not, that could certainly cause a break in the exhaust area
 
F

FriggenT1

Banned
jkells said:
And what did you do to fix it?

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Click to expand...

Well, the test I did was as I wrote above with a shop vac, it has 2 holes for vacuuming or blowing (quite handy to listen up dirt before interior cleaning I'll add). I stuffed a sponge in one exhaust port and set the hose up to blow into the other port. I got soapy water and sprayed all of the connections from the turbo/dp, and found there were bubbles as the vid shows actually coming from right after the flange. I used some foil tape temporarily, and then finally took the dp off and got a bead put around it. The first thing I'd likely do is spray all 4 do bolts with pb blaster, and let it sit for a day or 2...spray multiple times if you can. Then check the tq on them (iirc it's 35 ft lbs). It could simply be the bolts are loosened after a few heat cycles. If not, then I'd check all joints for leaks with the shopvac trick.
 
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