Compression check 59 AB

As I recall, a little motor oil down the spark plug hole between tests will tell you if the rings are the culprit for lower readings.If the readings come up significantly you may wish to investigate further, but if I had your readings, I would look elsewhere first. But what do I know, I'm into A models now, Get 94 in all four holes without oil. Good luck
 
I agree with Bored&Stroked .... it would be unlikely that a head gasket problem would encompass at all four cylinders. Also, given the relative uniformity of the right and left bank readings one could, at this point, assume that valve train problems are not involved (pending further testing).

That leads me to support Lanny's suggestion to check/re-torque that head to spec. Actually, if one really wanted to approach this more accurately (IMHO) one might go so far as to check/re-torque BOTH heads and then per Jseery, robert dick, daveymc29, re-test all cylinders using the so-called dry and wet method.

I assume (1) both heads are matching original to your engine, (2) one head has not been milled/surfaced where as the other was, (3) all cylinders are the same bore, and (4) the all piston rings match regarding age.

If you do re-torque and re-test please let us know the results.
 
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