4runner exhaust through window - Pirate4x4.Com : 4x4 and Off-Road Forum

slightdrift · 04-21-2008, 08:29 AM

O.k. I know this question is super lame, but I thought I'd ask b4 spending the bucks on a new tailgate.....So there is no back window in my 4runner and the exhaust smell is really bad in the cab. how many of you guys have this problem when it is down? I'm just wondering if it is really the window or if it is coming through the fire wall or some other place.

4CrawlR · 04-21-2008, 08:38 AM

When I still had the hard top on my '85, I would get exhaust smell if the rear window was open more than a few inches at speed.

MT4Runner · 04-21-2008, 09:14 AM

Crack your side vent windows...it helps push air out the back.

If you have the rear window open, front windows open or not, there's a vacuum behind the rig at speed, and it sucks air in through the rear window.

Cracking the pass sliders helps get more air pressure in the cab (relative to outside). Turning your heater vent fan on helps, too.

Or..kick out your windshield!!!

As an interesting side note, this wasn't an issue with my wife's 97. Different aerodynamics.

2manyprojects · 04-21-2008, 09:15 AM

Quote:

Originally Posted by MT4Runner

As an interesting side note, this wasn't an issue with my wife's 97. Different aerodynamics.

Maybe the wing/spoiler?

leorn · 04-21-2008, 09:44 AM

Quote:

Originally Posted by MT4Runner

If you have the rear window open, front windows open or not, there's a vacuum behind the rig at speed, and it sucks air in through the rear window.

My '85 factory manual agrees...

Java · 04-21-2008, 10:03 AM

a little wing on the back helps the new ones not have this problem.

ErikB · 04-21-2008, 10:17 AM

That's why I put a wing on mine made out of an aluminum door threshold. It allowed me to leave the rear window cracked w/o the fumes. It was a mod I read about on the intarweb and copied many years ago.

dirtoyboy · 04-21-2008, 10:42 AM

Quote:

Originally Posted by ErikB

That's why I put a wing on mine made out of an aluminum door threshold. It allowed me to leave the rear window cracked w/o the fumes. It was a mod I read about on the intarweb and copied many years ago.

How does that work at crawling speeds?

slightdrift · 04-21-2008, 11:19 AM

yeah what about crawling speeds? It smells when I'm not driving also, any ideas on that.

MT4Runner · 04-21-2008, 02:15 PM

Do you have exhaust leaks other places in your exhaust system? My tailpipe is cut off immediately behind the muffler, and it's not too bad.

slightdrift · 04-21-2008, 06:23 PM

I don't think so. It's a brand new exhaust all the way through. I think maybe my header might not be sealed all the way or I need to put some kind of sealer on where my cat bolts on( it just has a gaskets at the moment.

04-21-2008, 08:29 AM	#1 (permalink)
slightdrift Registered User Join Date: May 2005 Member # 48292 Posts: 474	4runner exhaust through window O.k. I know this question is super lame, but I thought I'd ask b4 spending the bucks on a new tailgate.....So there is no back window in my 4runner and the exhaust smell is really bad in the cab. how many of you guys have this problem when it is down? I'm just wondering if it is really the window or if it is coming through the fire wall or some other place.

04-21-2008, 08:38 AM	#2 (permalink)
4CrawlR Zeus of the Sluice Join Date: May 2001 Member # 4716 Location: Santa Clara, CA. Posts: 4,130	When I still had the hard top on my '85, I would get exhaust smell if the rear window was open more than a few inches at speed. __________________ 4Crawler e-mail TLCA Truck Editor e-mail 4Crawler web page 4Crawler Off-Road - Pirate4x4 discount code

04-21-2008, 09:14 AM	#3 (permalink)
MT4Runner IDIot! Join Date: Mar 2005 Member # 44480 Location: Kalispell, MT Posts: 16,631	Crack your side vent windows...it helps push air out the back. If you have the rear window open, front windows open or not, there's a vacuum behind the rig at speed, and it sucks air in through the rear window. Cracking the pass sliders helps get more air pressure in the cab (relative to outside). Turning your heater vent fan on helps, too. Or..kick out your windshield!!! As an interesting side note, this wasn't an issue with my wife's 97. Different aerodynamics. __________________ Motive Gear Land Use Team http://www.tenfactory.com http://www.motivegear.com http://www.nationaldrivetrain.com http://www.davezoffroadperformance.com http://www.mastercraftsafety.com FToy 086 - UHaul Toterhome

04-21-2008, 10:17 AM	#7 (permalink)
ErikB Grocery Getter Join Date: Feb 2000 Member # 59 Location: Auburn, CA Posts: 10,506	That's why I put a wing on mine made out of an aluminum door threshold. It allowed me to leave the rear window cracked w/o the fumes. It was a mod I read about on the intarweb and copied many years ago. __________________ . BUY MY CAMPER <click here> http://home.4x4wire.com/erik '97 4runner build

04-21-2008, 02:15 PM	#10 (permalink)
MT4Runner IDIot! Join Date: Mar 2005 Member # 44480 Location: Kalispell, MT Posts: 16,631	Do you have exhaust leaks other places in your exhaust system? My tailpipe is cut off immediately behind the muffler, and it's not too bad. __________________ Motive Gear Land Use Team http://www.tenfactory.com http://www.motivegear.com http://www.nationaldrivetrain.com http://www.davezoffroadperformance.com http://www.mastercraftsafety.com FToy 086 - UHaul Toterhome

04-21-2008, 10:03 AM	#6 (permalink)
Java Registered User Join Date: Oct 2005 Member # 56256 Location: Seattle, WA Posts: 80	a little wing on the back helps the new ones not have this problem.

04-21-2008, 11:19 AM	#9 (permalink)
slightdrift Registered User Join Date: May 2005 Member # 48292 Posts: 474	yeah what about crawling speeds? It smells when I'm not driving also, any ideas on that.

04-21-2008, 06:23 PM	#11 (permalink)
slightdrift Registered User Join Date: May 2005 Member # 48292 Posts: 474	I don't think so. It's a brand new exhaust all the way through. I think maybe my header might not be sealed all the way or I need to put some kind of sealer on where my cat bolts on( it just has a gaskets at the moment.

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