Exhaust coming into cabin when windows open

[Alfapride]

Hi there, I had this problem as well recently, I noticied it got worse when the air con was removed from the car - i installed 4 rubber gromets to where the pipes had gone from the engine bay to the internals of the car, this seems to have improved the situation a lot. Also have the carbies retuned sounds like they are running a little rich in the mixture, hope that helps!

[four90s]

Check your plenum drain pipe as well. I ended up putting a new longer one on and running it forward to the front of the engine bay to get fresh air.

The old one was a bit short and because of that, it pointed to the r/h pipe (GTV6) and there is a small leak from that pipe.

That took a bit of finding.

Steve
Adelaide

[Craig C]

I have the same problem and my short term fix is to wind the passenger window down a bit. I don't know if it equalises the pressure or just means that all the fumes don't have to get out past the driver to that window.

[aggie57]

This thread does remind me of an old Berlina I had once.  Rings were totally stuffed and it burnt oil at a prodigous rate.  Only way to fly and stay awake was with the windows down....which was challenging on mid-winter runs on the Hume overnight.  That always kept me awake!

[Beatle]

I recall cracking open the rear RHS window a couple of inches whenever I had the driver's window down on the coupes, to stop the air blast directly into my RH ear!!!

[Nate Dog]

All suggestions under advisement
Will get some more work done tomorrow and let you know how i go..


A very silly question.
For which i will get flamed.

But whatever. Here goes.

Is it worthwhile getting a high flow cat/resonator to replace the resonator in the exhaust system? They can be had fairly cheap, and might modernise the exhaust to the point where it'll help eliminate the worst of the smell, never mind being better for the environment.
Thoughts?

(Asks Nate cowering behind his keyboard)

[Beatle]

No idea Nate, but I admit I've considered it on another car I have that gets a little fumey from time to time.

I doubt a cat would ever improve flow, and they get rather hot, but a larger one might at least provide equivalent flow to the stock unit.

If the engine is burning oil, I suspect a cat wouldn't work for long though, once the innards are coated in oil.

Maybe shove an air-freshener up the tailpipe........

[DomenicC1]

I put a new catalytic converter in my old 75 because of the very reason you are suggesting Nate. It didn't make too much of a difference, the car still put out the same old horrible smell it always had and because of the fact that it was burning oil and probably a bit rich too, it actually killed the catalytic converter in less than 12 months. It started to rattle like crazy like the original one did...a waste of $250 for an aftermarket cat converter. Just out of interest I was actually quoted $1500 for a genuine cat converter from 2 different exhaust shops...told them to shove that up their arse! The 75 also had a resonator on the back...and still smelly!