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Shop said blown or cracked head gasket,(s)
1998 Oldsmobile Silhouette

Shop said blown or cracked head gasket,(s)

(1998 Oldsmobile Silhouette)
Shop said, Exhausted gases in cooling system, cracked or blown head gasket(s). This after replacing seals 6 weeks prior. Took 1998 Old Silhouette Mimi van in for van running hot. Replaced seals 1500.00 . Six weeks later van doing same thing , running hot, . Without taking apart they gave above diagnoses and quoted 2500.00. If first repair was done correctly, shouldn't the second issue not of occurred ? Thank you
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Popular Answer
If the cylinder heads were not inspected by machine shop to verify they are not cracked, the new gaskets would not last very long. Cylinder heads are common to crack when they overheat as well as the sealing surfaces warp which allow for leaking. A machine shop will pressure test for leaks as well as resurface gasket area to ensure proper seal.
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General Diagnosis
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If the cylinder heads were not inspected by machine shop to verify they are not cracked, the new gaskets would not last very long. Cylinder heads are common to crack when they overheat as well as the sealing surfaces warp which allow for leaking. A machine shop will pressure test for leaks as well as resurface gasket area to ensure proper seal.
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