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what could cause this? Pic inside

Yao

Well-known member
Joined
Mar 6, 2001
Messages
810
Location
Denver, CO

Okayplayer

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Joined
Jan 14, 2010
Messages
255
Location
Denver, CO
Looks like you had a pretty good exhaust leak. Maybe a bolt wasn't tightened enough. Or maybe the mating surface on the manifold, or exhaust housing wasn't flat. Or the gasket just failed.
 

rdomeck

Well-known member
Joined
Jun 1, 2011
Messages
620
Location
Indianapolis, In.
Maybe that one bolt was tightened down first and then the gasket was moved to put the other bolts in? Doesn't look like a blow out, looks like it was torn.
 

TRBODSM

Well-known member
Joined
Feb 4, 2009
Messages
278
Location
Northglenn, CO
I would also say exhaust leak but it looks like one of those thick metal gaskets. I would use a OEM gasket and OEM bolts and washers(2 washers per bolt) and don't forget the anti-seize. Off the top of my head I believe the bolts are torqued to 48-49 ft/lbs. Never had a problem with that set up.
 

Yao

Well-known member
Joined
Mar 6, 2001
Messages
810
Location
Denver, CO
I know, it looks like torn, but it is infact a blowout!!? If a thick metal gasket like that couldn't stand a chance, what makes stock gasket work? I have the stock over size one on there now, but incase I need another if it happens again, what is the part number for the stock bigger hole gasket?
 

Diego

Well-known member
Joined
Dec 9, 2007
Messages
2,132
Location
In a van down by the river, Iowa
ANY gasket will explode with a loose bolt. Here is my old gasket, thankfully I have spares, one of the turbo to mani bolts backed out causing this on mine.
 

Brunoboy

Well-known member
Joined
Apr 25, 2008
Messages
2,880
Location
San Bruno,CA Home of SFO
Quoting Yao:





this happened to me many times, changed your manifold to turbo bolts and use the washers.
 

broxma

Well-known member
Joined
Nov 16, 2009
Messages
911
Location
San Antonio Tx
There is another really good solution for this. Have the surfaces machined or sanded flat, and don't use a gasket at all. I don't use any gasket on my turbo to manifold flange. If it's smooth enough, you don't need one.

/brox
 

mr.mitsu

Well-known member
Joined
Apr 28, 2003
Messages
798
Location
canada
I always use an oiling stone on any machined mating surfaces.

Must be the millwright in me lol
 
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