Cracked exh manifold..options? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 02-10-2005, 10:56 PM   #1
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Default Cracked exh manifold..options?

Somehow I have developed a crack iin my rear exhaust manifold (adjacent firewall). GM wants a fortune for one of these things, and the 'net yields very little. It isn't a huge crack. Is some sort of welding an option, or a waste of time and money?
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Old 02-10-2005, 11:00 PM   #2
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how bad is it?
if its not that bad i would just let it go, mine leaks and it doesnt bother me at all, unless im using top engine cleaner(it puts out enough smoke to spot it then).
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Old 02-10-2005, 11:00 PM   #3
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could try to weld it...Don't see the harm in that....or you could get some TOGS
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Old 02-10-2005, 11:01 PM   #4
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I don't think welding would hurt. I'm sure you could find a cheap used manifold at a junkyard if you had to.
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Old 02-10-2005, 11:05 PM   #5
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Quote:
Originally Posted by LakevilleSSEi
could try to weld it...Don't see the harm in that....or you could get some TOGS
unless its a S1
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Old 02-10-2005, 11:06 PM   #6
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Series II motor? Headers...



Otherwise get a used one if having it welded doesn't work. An exhaust shop might be able to help with that.
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Old 02-10-2005, 11:07 PM   #7
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Yeah, you would think that a used manifold would be a possibility... unfortunately, they are rare. The supercharged engine and non-supercharged do not share exhaust pieces such as manifolds. GM has me at gunpoint for $340-$400...
Leaving it go isn't an option -- the O2 sensor is slowly melting and it won't pass VA state inspection (exhaust leak)
Crack is a widening hairline, just before the sensor. I also hear manifold leaks eat valves (lack of backpressure)
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Old 02-10-2005, 11:09 PM   #8
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Finding exhaust manifolds is easy. Find what cars match, and go to that site. LOTS of GP guys have spares lying around,
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Old 02-10-2005, 11:09 PM   #9
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This happened a few years ago on my 92 SE. I found an exhaust manifold for $70 USD at a wrecking yard specializing in Chevys right here in town. The gasket for the manifold and the doughnut-like gasket for the exhaust pipe were about $30. It took a couple of hours and lots of scraped knuckles to change.
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Old 02-10-2005, 11:14 PM   #10
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What is TOGS? Not familiar with that...

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