| Loud Exhaust [message #303012] |
Sun, 03 July 2016 19:04  |
Jim Schulte
Messages: 9
Registered: January 2016
Location: Strawberry Point, IA
Karma:
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Had unit at local mechanic, and asked him to correct excessive exhaust noise thinking the doughnut was out. His opinion is the heads are cracked. I had him do a compression test and he stated compression in all cylinders is from 140 to 145 and the doughnut is OK. He said he thought there is a head crack at the exhaust manifold that does not extend into the cylinder on both heads. 1977 23ft Birchaven with 133000 mi and a 455. I do not understand cracked heads? I would suspect a bad exhaust manifold gasket and if so any recommendations on bolt removal and replacement of gasket. Jim
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