Originally Posted By GTXMEX
OK, motor problem STILL not identified. Here's the latest info.

Did a dry compression test on all cylinders today with all spark plugs removed and throttle wide open. Here is the results:

Cylinder # Compression seen
1 170
2 179
3 170
4 161
5 169
6 180
7 150
8 152

Engine with new oil pump has almost 70 pounds of oil pressure.

More and more I'm thinking the issue maybe the chain jumped and the timing is all out of whack. We will use top dead center tool to check timing next weekend.

Any new thoughts? Are my cylinder pressures OK for a street motor (that sees some strip) with likely 40,000 miles on the rebuild?



Odd that the back cylinder on each side of the block are both 20 psi less ? or is that 7 and 8 2 cylinders side by side ?

What are you using for head gaskets ?

running up my post count some more .