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do you seriously think that theres a hole in the piston in all the cylinders? or the rings are gone in all the cylinders.. highly unlikely.. the main cause of loss of compression is the rings are burnt gone. the rings are stuck, the valves are stuck, hole in the piston and/or head, bent valves, or the timing chain/belt came off, or broke.

with all the cylinders being down, i'd look into the last one. that's the only thing that would be logical to effect all the cylinders evenly.

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Q: What does it mean when a cars engine has no compression I was looking on craigslist for a car and I found one but the guy that is selling it said that the engine has no compression.?
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