cylinder compression readings

[English Guy]

Hi folks,I am trying to find out if my head gasket is shot by using a compression gauge.Can anyone out there tell me what a good psi reading would be on my stock 1989 stock L98 cylinders?Many thanks in advance.
bri

 

[ex-x-fire]

A healthy engine should have a reading of 150-160psi on the average. 120 is low but still ok if the engine doesn't burn oil or leak coolant. You can have a 5% difference reading between each cylinder.

 

[English Guy]

ex x fire,thanks for the info.nice one.