why does engine lack compression?

Asked by Mar 01, 2015 at 10:58 PM about the 2006 Ford Fusion SE

Question type: Maintenance & Repair

the engine lacks compression

2 Answers

21,045

Several things: worn piston rings, holes burnt into piston heads, worn/burnt valve seats, blown head gasket, warped head, blown threads on plugs, you might also have a bad/jumped timing chain that prevents valves from opening/closing at proper times. Some of these are worst case scenarios, the most common cause is a blown head gasket.

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Have you had the compression measured? If so what were the readings?

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