My compression is 90 on all 4 cylinders I just had my head gasket changed head checked and shaved replaced the 3mm head gasket with a new one due to not getting all the air out after installing a new radiator . Need help any advise might be helpful. Car runs and idles good but low compression is bothering me

 

Anyone

 

Leakdown test?

 

90 on all 4 is pretty bad, but consistent. Are you sure something else isn't the problem. Have you tried another gauge yet? The fact that they are all similar #'s, but close in range leads me to think it could be a bad gauge.

 

Yes used different gauge and same results. The head was inspected and checked .came back good . We checked the timing aging and it dead on

 

Do a leakdown test, it'll show you where the leak is.

 

Leak down test will be next. Dies anyone know with a 3mm headgasket what the compression should be?

 

Bump

 

Results on the test?

 

i still have 90 comp on all 4

 

do a wet compression test

 

Put in the stock headgasket.

 

are you doing the compression test procedure correctly? take out all the spark plugs, take out the fuel pump fuse, hold the gas pedal all the way down and crank the motor over anywhere from 6-8 rotations.