1995 Buick Century zero compressions

1995 BUICK CENTURY
61,497 MILES • 6 CYL • FWD • AUTOMATIC
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1995 Buick Century mileage: 61,497. What causes an engine to burn or blowhole in top of piston #6 cylinder to have zero compression? No oil in water, no water in oil, but air cleaner has a lot of oil and blew oil out the dipstick tube and oil fill. This is the total miles on the car and the motor has 12000 on last rebuild. First had a spun bearing.
Oct 13, 2010 at 6:17 PM
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The reason for piston failure is normally a lean fuel mixture possibly caused by a vacuum leak. There is a remote chance it might be ignition timing and pre-ignition.
Oct 13, 2010 at 6:20 PM