Having problems with your 2002 Mitsubishi Galant ?

No compression in engine

\015 Will not start,didnt overheat,no compression in engine 2002 4 cyl galant,time belt is fine,engine is firing compession tester reads 60\015 Posted / edited by AnonymousUser on : 12-11-2018

Answers :

Hard to believe broken rings on a car only 8 years old?
If rings break, there would be lots of crankcase pressure, blowby, and oil leaks everywhere. I have even seen dipsticks shoot out.
Rings are broken by not letting an engine warm up, before very hard acceleration. And you will never break rings evenly in more than one cylinder at a time. So seems very unlikely.
Finally, if compression really gone, then engine would crank over like a demon. With no resistance, it would spin like crazy.

I think the real problem is the timing belt jumped.
The belt did not totally break, but a backfire or something caused it so jump one or more teeth. This will cause the camshaft to hold the valves open and you have no compression then.
Check the camshaft timing.

Basically what you do is turn the crankshaft to TDC (Top Dead Center) of the timing marks, (usually on the crankshaft pully, but sometime on the flywheel, through a viewport).
Then with the cover off the camshaft shaft should have a visible mark that is supposed to line up with a marker, the plane of the tops of the head, or something. Not hard to do, and you can look up the actual marks in the library.
Could be head gasket, burnt valve or worn piston rings. Hows the oil pressure? low oil pressure will indicate a badly worn engine. High oil level in crankcase but good oil pressure might point to a blown head gasket. Also a pressure test on the cooling system may help with diagnoseing head gasket. Consult your shop manual for instructions.
\015\012Good luck. Please rate, thanks.
Repair Help & Product Troubleshooting for 2002 Mitsubishi Galant

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