I suspect the engine has a leaking exhaust manifold

1995 BUICK RIVIERA
160,503 MILES
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STOKES
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When the engine is first started I suspect the noise I hear is a leak from the exhaust manifold. However after a short while the noise is silent.
May 2, 2012 at 9:42 PM
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SATURNTECH9
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See if you have any loose or broken bolts holding the manifold on also look for black carbon showing signs off exhaust going around the manifold. Thats where i would start.
May 2, 2012 at 9:49 PM
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STOKES
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Thanks >> Is there a spray one can spray the area to check for leaks?
May 2, 2012 at 10:12 PM
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ASEMASTER6371
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no spray but look for smoke when you start it to narrow down the leak.

you can get someone to close off the exhaust out the back with a rag for a minute to force the leak as well.

Roy
May 2, 2012 at 11:46 PM
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SATURNTECH9
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With the spray your thinking of looking for a vaccuum leqk not exhaust leak.
May 3, 2012 at 1:10 AM