Pontiac Bonneville Problem Report

Pontiac Bonneville Engine Overheating Due to Leaking Headgasket

(2 reports)

Overheating of the engine may cause the cylinder head to expand, severely straining the head bolts and damaging the threads in the engine block. This commonly results in a blown head gasket. Our technicians tell us the engine block threads must be repaired before the cylinder head is reinstalled.

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