Exhaust fumes in rear window - JeepForum.com

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post #1 of 16 Old 10-09-2012, 01:45 PM Thread Starter
GatorsUF
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Exhaust fumes in rear window

Has anyone found a good way to stop exhaust fumes from coming in the rear window?

I have a softop on my Jeep and since its parked under an oak tree at my house I usually leave the top up and just pull all the windows out. For some reason this causes a vacuum in the back windows where air comes in the back windows as I am moving forward. Along with this air is all the exhaust fumes from my tailpipe which is on the passenger side under the bumper.

I am tempted to try an make it go more out the side of the jeep than out the back and hopefully that would help.

I am not as bothered by it, but my wife rarely wants to ride in the Jeep because she says "I don't want to smell like gas".

Ideas?

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post #2 of 16 Old 10-09-2012, 01:48 PM
mrmark
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they all pull the exhaust back in, just like a PU, you would have to exhaust out the side I would think to eliminate it.

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post #3 of 16 Old 10-09-2012, 02:18 PM
TJEvans
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If I keep the rear side windows in, while having the door tops off and rear window open, I'll smell the fumes. If the rear windows are out, it let's the air escape before reaching the front passenger cabin.
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post #4 of 16 Old 10-09-2012, 02:26 PM
mrmark
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I drive with an extended top no doors or windows and was blowing oil out the back, it would leave a film of oil on my dash.

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post #5 of 16 Old 10-09-2012, 02:41 PM
Old4X
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Run a bikini top instead, or else have all the windows installed in the top. Half doors or door windows down will not pull exhaust in if everything else is in.

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post #6 of 16 Old 10-09-2012, 03:36 PM
seattle_yj
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Also if your exhaust is piped strait out the back, sometimes the fumes get sucked up by the tire carrier and such. If you add a tip on the back to pipe the exaust down, it will help with this. I put a curve on the end of mine and pointed it out to blow the fumes that way. I test it out and it helps tons. I just have to weld it on and pretty it up.
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post #7 of 16 Old 10-10-2012, 07:25 AM Thread Starter
GatorsUF
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Yea the only issue with going out the side is if I just got to the edge of the body it will still be right behind my rear tire and I imagine will get caught in the vortex again. If I go out past the rear tire it would look ridiculous.

I thought about pointing it down, does that help? Or cut it off shorter then point down before the rear axle?
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post #8 of 16 Old 10-10-2012, 09:46 AM
seattle_yj
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Pointing it down helped in my case. You can buy a tip and just try it out like I did. I wouldn't cut it back behind the axle though, I think that would make it worse.
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post #9 of 16 Old 10-10-2012, 10:22 AM
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You could always use the stacks like the semi's do. Heck, I even see those on some duallies now. Just kidding, don't do that.
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post #10 of 16 Old 10-15-2012, 12:01 PM Thread Starter
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So pointing it down makes it not get pulled in through the rear window? Or just helps a little?
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post #11 of 16 Old 10-15-2012, 11:59 PM
seattle_yj
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Quote:
Originally Posted by GatorsUF
So pointing it down makes it not get pulled in through the rear window? Or just helps a little?
In my case it pretty much fixed the issue. I have just tested this but not permanently installed anything yet. Note I'm a hard top though, soft tops are less forgiving with keeping out fumes.
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post #12 of 16 Old 04-23-2013, 01:29 AM
etienne389
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[QUOTE=GatorsUF;14276355]Has anyone found a good way to stop exhaust fumes from coming in the rear window?

I have a softop on my Jeep and since its parked under an oak tree at my house I usually leave the top up and just pull all the windows out. For some reason this causes a vacuum in the back windows where air comes in the back windows as I am moving forward. Along with this air is all the exhaust fumes from my tailpipe which is on the passenger side under the bumper.

I am tempted to try an make it go more out the side of the jeep than out the back and hopefully that would help.

I am not as bothered by it, but my wife rarely wants to ride in the Jeep because she says "I don't want to smell like gas".

Ideas?[/hi, i am new here. how are you? did you solve the problem ? i have same problem and i wish to solve it too. best regards. thanks]
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post #13 of 16 Old 04-23-2013, 07:02 AM
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alot of the time, to stop the blow back, I'll leave the back window in, and take the sides out. makes for a more aerodynamic jeep IMO, and it keeps the exhaust out, while letting fresh air in

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post #14 of 16 Old 04-23-2013, 08:37 AM
Joe100
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Exhaust Fumes

Hi! I had to have a new exhaust system put on my YJ the fellow putting it on put the exhaust tip bent a 90* on it to go out the side . he say's it gets the fumes away from the back window. At least I don't have the fumes coming through the floor. Joe100
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post #15 of 16 Old 04-23-2013, 08:39 PM
mrmark
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Wrong spot damn phone
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