Hi,

I have checked the compression multiple times. I have done this with 2 "new" head gaskets. I chased out the threads. I even blew out the bolt holes with compressed air. I even got a new set of head bolts. I did the compression test with a fully charged battery and I followed the procedures that you cited. I was advised to check the compression with the oil down the cylinder after getting the low numbers. That is how I got the one high number that one time.

The retourqing of the head bolts was done on the original cylinder head(head #1). I suspect that is what killed the head gasket originally.

The current cylinder head(head#2) was used to get the current compression numbers. The compression was checked with 2 different "new" head gaskets with the current head(head#2). I even got new head bolts with the second head gasket to check the compression numbers.

The cylinder head bolts were torqued in 2 steps as shown in the shop manual in the proper sequence. The timing was correct and the valves were adjusted to correct specs. .06 intake and .10 exhaust.

If the block is not likely to be cracked what else would cause this low compression in the bottom end?????

Thanks


Mike