| When you moved the lifters, did you move just the intake lifters or did you move in complete sets of 4. As in, the intake lifters and the exhaust lifters from each hole? They should have moved in sets of 4. To the exact 4 corresponding locations in another hole. Did you ever do that? Because that could explain why the compression wasn't exactly the same in each hole, if you just moved the intake lifters only. Or if they were all moved randomly. I think you should save up your money, buy a set of lifters, and try it again - or tear it down and verify the head is good. I don't really see many other options here. Unfortunately I don't know exactly what you've done now with the introduction of other lifters, etc. Yes I liked that the compression changed. But it didn't change enough to say, OK, it'll run. If you had 110 psi on all cylinders, I'd say fire it up! As for your #5 hole. Perhaps that was the hole that was the one you think you pushed the valves in to the piston. It was likely only affecting one hole...so maybe that was the one and you didn't get away with it. I don't know. Again, swap the lifters around and re-test it. If it goes up to 90, well... This whole thing could potentially be lifters only. And until you have a complete set of known goods, you're not going to be able to prove it by any other way than swapping lifters around. Testing. If you do this numerous times and know how the lifters (in groups of 4) perform in certain holes, those 4 lifters should yield the same compression in all holes they are moved to. If you can not get similar compression numbers in each holes using that identical group of 4 lifters, then you've got other problems like bent valves. I'd focus on finding 4 lifters that yielded the best compression in a certain hole. And move those 4 lifters (intake to intake and exhaust to exhaust) and just test each hole. Sure it's time consuming, but as soon as you find a hole that isn't yielding similar compression, you know it's game over on the lifters theory. I think you've kind of done this already - I'm just re-typing how I would have done it - because just moving the lifters around randomly won't provide an understandable result. It's possible each lifter holds each valve open by a slightly different amount. Etc. So a varying combination will provide random compression numbers. But a constant combination (ie, same group of 4) in the same position should give you a constant. If it doesn't, it's valves, etc. Sorry for your trouble on this Z.
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09:15:09 12/17/09
