Reply to "Engine rebuild"

I just did a pumping test, and the oil in the cylinder trick to see if the rings are worn. I don't think it's the pistons, the engine looks pretty fresh but according to Murphy's Law it's probably a cracked block (although I didn't notice anything obvious when the heads were off). When time allows I will do a thorough investigation.
The heads were brought to a local speed shop and checked out OK. The compression is a little off on the right bank which indicates they need to be re-torqued and some research online revealed they are suppose to be to Boss specs (125 lbs/ft), slightly more than the book spec (95-105 lbs/ft).
It's amazing though that the compression is exactly to the decimal the same on the leaking cylinders as before "re-build".
Cause of overheating: faulty fan relays in stop and go traffic on the interstate.
Bubbles in the coolant!?! I had a virtual geyser in the engine compartment at operating temperature, but luckily there was no water in the oil when I drained it.
Question: How much does incorrect valve lash effect pumping pressure? (Grasping for straws here).


[This message has been edited by zantin351 (edited 12-19-2003).]

[This message has been edited by zantin351 (edited 12-19-2003).]