I havent tor eht emotor apart. We just finished it. Fully built. From top to bottom. Its a 92 LS turbo in my 92 hatch. Heres the prob. MY car runs fine on the first day. I boosted it a lil like to 6 psi to see if things are working okay. LAter that night my radiator cracks. I am getting a new one. so I take it home and put my car to sleep. Today I started my car and it sounds like its running on 1 cylinder. We checked everything as far as out side. We did a compression test and came to 80, 80, 80, 80 all the way across. Did my rings go out already. Motor only has like 3 miles on it. or did my head gasket blow. I dont know. Anyone ever have this prob.

let me know

 

...to hold the throttle body open while you cranked it? Also, did you do a leakdown test? Did you see coolant in the oil, smoke, anything..?

 

white smoke, oil was fine, nice and gold

 

This is what I was told when I got low compression numbers.

Repeat the test but this time do it twice. The secound time you do the test put one capful of oil into each cylinder right before you test it. If the compression goes up due to the oil it points to it being a problem with the rings. If not, it could be leaky valves. You also might try with someone elses compression tester because it could be something as simple as the calibration of that tester being off. One last note- make sure the starter and battery are up to snuff as a low battery or bad starter can cause low numbers on a compression test. Hope some of this helps.

edit-also be sure that the car is at normal operating temperatures when you do this.


[Modified by nugget8000, 8:39 AM 8/23/2001]

 

You most likely have a blown headgasket, and that's what caused your radiator to crack.