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#1
11-13-2007, 11:22 PM
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1996 Exhaust Donuts
In the morning, or whenever my vehicle has been sitting for a long period of time, I hear some exhaust ticking from my front drivers wheel well area. The noise gets alot quieter after the vehicle warms up. Do these things expand creating a little better seal when they get heated up? Judging the way the previous owner put the engine together after he worked on it, I wouldn't be suprised if it was the wrong size, old and cracked, or not even there.
  I plan on just replacing the thing but I would rather wait till it's not so cold here. Thanks!
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~Suburban-nator~ 1996 Suburban | 5.7 liter 350 | 4L60E - Transgo Shift Kit | 4X4 K&N Intake | Magnaflow Cats | Flowmaster 50 Series  
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#2
11-13-2007, 11:27 PM
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Re: 1996 Exhaust Donuts
It could be the joint between the manifold and the down pipe, or it could be a cracked manifold. The early vortec engines are known for manifolds cracking.
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NO 4 N JUNK  1994 GMC K1500 XC 5.7L 2008 Chevy Impala LTZ
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#3
11-14-2007, 11:14 AM
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Re: 1996 Exhaust Donuts
My '98 K1500 Sub was doing the same thing. I replaced the exhaust gasket (donut) and man, what a difference! Sounds like new. The 3 nuts that hold the manifold and exhaust pipe flanges together are somewhat difficult to reach, but if you're able to get enough leverage to break them loose, it's not a bad job.
Good luck. Steve
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