Exhaust fumes in cabin

[gtrjon]

Ive been having this issue for the last while and I want to address it before another summer of racing and driving. Basically when driving, more so when boosting I am getting heavy exhaust fumes in the cabin. There is no visable smoke but my eyes start to water. Not only is this irritating its really not safe. What I have discovered is:

Fumes are stronger when boosting heavily
fumes only are relevant when a window is cracked or rolled down

I am pretty sure the fumes are coming through the transmission tunnel and making their way into the cabin via **** hole. I think the fumes are only present if a window is cracked open or rolled down as the window is acting as a vacuum if you will pulling the fumes into the cabin through the shifter hole.

My boot on my shifter is torn, i think its pretty hard not to find one of the rubber boots without at least a slit in it. I have tried to seal it with silicone to no avail. Im pretty sure the fumes are coming from my wastegate which would explain the correlation to stronger fumes when boosting. An option would be to reroute the dump tube away from the tranny tunnel however with my 4" down pipe, and a 60mm wg there simply isnt enough room to reroute it without serious fab work which i will no get into at this stage.

Basically Im just looking to see if anyone else has had this issue and if there is a better way to seal up the shifter hole/tranny tunnel to keep fumes from making their way into the cabin

[bobbo]

I'm sure Daryl or whoever you like to deal wih could get you a new boot but tough to say if that would help.
Does speed have effect on the exhaust ingress?
Any chance you could post a pic or two of your WG set up? I'm just wondering if there would be a reasonably easy way to manipulate air flow to get escaping gasses away from the cabin.

[Turboholic]

Had same problem. Ended up being my test pipe gaskets were leaking and coming through shifter/transmission into cabin.

[steveo1502]

Exhaust fumes in cabin

Yes through the shifter, I smelled fumes , while ago I installed a Nismo short shifter, the rubber seal was torn on the stock shifter itself, was coming up through both seals, and my downpipe was cracked( didn't know until I took it off.) one time I was driving like 110 on the highway, I actually saw smoke coming up through there, freaked me out , I had to pull over and check but nothing seemed out of the ordinary

[caliber676]

New shifter and some insulating tape or soft sticky rubber called "dumdum". That'll seal it right up. But others are right if your wastegate is placed right by that area it might also be wise to maybe add a then of pipe to route it past the shifter area or away.

[steveo1502]

Bahaha I just read your whole post Jon, your eyes start to water? That's pretty bad , so your wastegate just dumps? Not back to exhaust? I tried that for about a week, it was too annoying, I had to change it. Fun scaring people at bus tops though , Nismo shortshift was like 130 at nengun, nice rubber seal and I clamped around the shifter, I wish I got a c's shifter though cause this Nismo dosnt seem any different than stock

[turdzoplenty]

I used a z32 boot from pik n pull. 2 bucks

[gtrjon]

No I don't recirculate my dump. I don't hit dump enough on the street to justify it at 27psi.

[Bossman]

I use bicycle inner tube repair kit to patch rubber, might want to give that a try on the rubber boot first before getting a new one.

[h4X6]

im pretty sure the 97+ 240 boots are the same as well... see if you can find a past number and go to nissan. they have been able to order me anything i needed in the past as long as i had a part number...