Exhaust leak behind engine?

supraflymkiii · 05-18-2010, 01:55 AM

Not true you can replace the egr cooler with a gasket with the engine still in the car. it will probably be tricky to get the gasket material scraped off the head but it can be done. But it does sound lke the egr cooler is leaking. If you want to do block off plates its recommended that you get a jdm ecu. otherwise you might as well get a new egr cooler gasket.

Green7mgte · 05-18-2010, 12:27 PM

I have an exhaust leak in the same location "about" were the man is speaking.

stripped exhaust bolt is the most likely suspect, Unless you did not rebuild your head gasket in the last year. good way to rule that out. did you take off your exhaust manifold?

Brutus · 05-18-2010, 01:49 PM

Quote:

Originally Posted by Green7mgte

I have an exhaust leak in the same location "about" were the man is speaking.

stripped exhaust bolt is the most likely suspect, Unless you did not rebuild your head gasket in the last year. good way to rule that out. did you take off your exhaust manifold?

I have the same problem. I removed the seal on the rear of the hood to draw more air from underhood and keep the engine cooler. But when i'm idleing I get exhaust gasses in the cabin. I'm pretty sure it is coming from the engine bay as before i removed the rear rubber seal I didn't have the exhaust in the cabin.

I'm putting on a flex-a-lite 410 fan, uderdrive crank pully, and front strut tower brace as well as a dyno and tune over the next couple of days and will have Splitfire Auto look into the exhaust problem as well.

I'll report back soon.

CanadianBak'inSupra · 05-18-2010, 03:36 PM

i just heat wrapped my manifold, and my manifold gasket was barly there...
i would start with where manifold reaches exhaust.
also its only like a 1.5$ / foot of the vacuum lines if you think its egr, just buy 10 ft and start 1 vacuum line at a time i replaced every line on mine just because i could for under 30 dollers (it took about 26 feet for my 84 5m-ge)

also i have seen these manifolds crack, check for cracks and make sure the heat shield studs are all tight, because they go strait through to the inside of the manifold

907mge · 05-18-2010, 04:01 PM

Here is a good link about the exh man. studs that i've found as well as some other good info for anyone interested
http://cjsupra.kendra.com/Helicoil.html

turbonicsperformance · 05-19-2010, 03:34 AM

just pull a small vac line and run some atf into it look for the smoke and you've found your leak and gotten a slight decarbon or you could buy some seafoam and do it and get a full decarbon

vbryanv · 05-24-2010, 11:24 PM

sat i blew a freeze out plug from the block and to replace it i had to take the exhaust manifold out. every bolt that came out came out wit threads and the rear 4 bolts where loose cause they where stripped. also from the head and gasket i can tell i had a major exhaust leak from cylinder 4 to 6. sucks now time to heli-coil. i will let you guys know how it comes out after repairs.

05-18-2010, 12:27 PM	#2
Green7mgte Supra Forum Moderator Join Date: Nov 2009 Location: Green-Ohio Posts: 1,297	I have an exhaust leak in the same location "about" were the man is speaking. stripped exhaust bolt is the most likely suspect, Unless you did not rebuild your head gasket in the last year. good way to rule that out. did you take off your exhaust manifold? __________________ 92 Ma71 7mGTE Auto. SafcII Supra FAQ Supra MKIII FAQ Classified Section guidelines :

05-18-2010, 03:36 PM	#4
CanadianBak'inSupra Official hall monitor / search nazi - NO SOUP FOR YOU! Join Date: Oct 2009 Location: Canada, BC Posts: 837	i just heat wrapped my manifold, and my manifold gasket was barly there... i would start with where manifold reaches exhaust. also its only like a 1.5$ / foot of the vacuum lines if you think its egr, just buy 10 ft and start 1 vacuum line at a time i replaced every line on mine just because i could for under 30 dollers (it took about 26 feet for my 84 5m-ge) also i have seen these manifolds crack, check for cracks and make sure the heat shield studs are all tight, because they go strait through to the inside of the manifold __________________ 1984 supra - 1uzfe - w58 - 4.10 - 1 piece aluminum shaft.

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05-18-2010, 01:55 AM	#1
supraflymkiii 3" Exhaust Join Date: Sep 2005 Location: Menasha, WI Posts: 63	Not true you can replace the egr cooler with a gasket with the engine still in the car. it will probably be tricky to get the gasket material scraped off the head but it can be done. But it does sound lke the egr cooler is leaking. If you want to do block off plates its recommended that you get a jdm ecu. otherwise you might as well get a new egr cooler gasket.

05-18-2010, 04:01 PM	#5
907mge 20psi boost Join Date: Dec 2009 Location: Harrisburg Posts: 759	Here is a good link about the exh man. studs that i've found as well as some other good info for anyone interested http://cjsupra.kendra.com/Helicoil.html

05-19-2010, 03:34 AM	#6
turbonicsperformance 3" Exhaust Join Date: Apr 2010 Location: sarasota fl Posts: 194	just pull a small vac line and run some atf into it look for the smoke and you've found your leak and gotten a slight decarbon or you could buy some seafoam and do it and get a full decarbon

05-24-2010, 11:24 PM	#7
vbryanv 3" Exhaust Join Date: Apr 2010 Location: new jersey Posts: 57	sat i blew a freeze out plug from the block and to replace it i had to take the exhaust manifold out. every bolt that came out came out wit threads and the rear 4 bolts where loose cause they where stripped. also from the head and gasket i can tell i had a major exhaust leak from cylinder 4 to 6. sucks now time to heli-coil. i will let you guys know how it comes out after repairs.