Timing Chain? on 2002 Pontiac Sunfire

Engine stopped running. Turns over fine. No compression in 2 cylinders. Pulled valve cover and when turning engine over the valves do not operate. no visible valve problems (but have not seen inside cylinders). Is this likely a broken timing chain? Is the 2002 2.2L (gasoline not diesel) an interference engine?

by in Pineville, MO on April 07, 2010
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2 answers 1 comment
ANSWER by , June 11, 2010
2.2l ohv engine is non interference engine --- timing chain tensioner fails 2.2l ecotec engine is an interference engine that will be damaged if the chain fails I think your engine is the ohv engine which means you need to replace the timing chain and tensioner align timing marks and engine will run fine
COMMENT by , October 14, 2012
is that pontiac sunfire with chain
ANSWER by , April 07, 2010
Sounds like the timing chain failed and chain driven engines are usually interference engines so you probably have a couple of bent valves. The only way to find out is to do a compression test or pull the cylinder head