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05-15-2012, 09:02 AM
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#1 |
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Registered User
Join Date: Jul 2011
Location: Dallas, TX
Posts: 205
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Exhaust Fumes
I'm trying to find the source and may you guys can help me out. I put new headers, exhaust, mufflers... but for some reason I get exhaust fumes inside the cab. Is there something I should look for under the dash?? I dont see any holes in the firewall.
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05-15-2012, 09:46 AM
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#2 |
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Robert Olson Transport
 
Join Date: Oct 2002
Location: recent transplant to NC USA
Posts: 20,287
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Re: Exhaust Fumes
perhaps there is a rust hole in the bottom of the cab the door seals are not tight? is the exhaust properly bolted on like are the headers set on a gasket and are the bolts tight enough?
also if all else fails is the exhaust dumping in a place where it will blow back into the cab?
__________________
Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!! |
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05-15-2012, 09:54 AM
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#3 |
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Registered User
Join Date: Jul 2011
Location: Dallas, TX
Posts: 205
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Re: Exhaust Fumes
No rust...Exhaust is new and sealed. Headers are properly bolted and exhaust runs all the back to rear bumber. Doors are sealed too. It seams to come thru the vents.
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05-15-2012, 10:02 AM
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#4 |
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78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: Exhaust Fumes
on my 78, valve cover blowby
from the steering wheel(actually turn signal lever hole) and how is your cowel seal(hood to firewall)
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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05-16-2012, 08:58 PM
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#5 |
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Registered User
Join Date: Nov 2009
Location: Sonora California
Posts: 860
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Re: Exhaust Fumes
Just for kicks try putting the tailgate down and go for a drive. The factory pipes were out the side behind the rear tires.
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05-16-2012, 09:02 PM
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#6 |
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Registered User
Join Date: Jul 2009
Location: washington
Posts: 4,178
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Re: Exhaust Fumes
There at plastic plugs under the seat. Sometimes thes disapear.
You clearly have a leak somewhere. Posted via Mobile Device
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377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511 |
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05-16-2012, 09:24 PM
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#7 |
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Registered User
Join Date: Jan 2009
Location: Louisville,Ky
Posts: 5,811
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Re: Exhaust Fumes
Did you re torque the headers a week later?I know the exhaust is new but is it clamped or welded together?
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05-18-2012, 02:26 PM
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#8 |
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Registered User
Join Date: Jul 2011
Location: Dallas, TX
Posts: 205
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Re: Exhaust Fumes
Think I found it... where the headers connect to the exhaust it had a gasket instead of the donut. Put in donuts on both sides nothing yet...
Thanks |
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