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unindicted co-conspirator
Join Date: Jul 2007
Location: Fresno, CA
Posts: 1,660
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i had something similar, it was a loose exhaust header bolt.
As the motor warmed up, the metal expanded & tightened itself up.
It sounded like rocks in the cam housing
Check for loose bolts
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'03 996 - sport exhaust, sport seats, M030 sport suspension, stability control, IMS Solution
‘86 928S3 - barn find project car
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