zero compression yes Zero lol !
Yeah I understand the risk and the cost on this deal , I'm trying to stay positive and optimistic , I'm going to try and borrow a scope so I can get a real good look at the piston . I cleaned everything real good while it was apart and the zero compression also means it's been washing fuel so it is nice and shiny in that hole . going to spin it some more with the plugs out to see if it is a sticking valve then run it in the driveway for twenty minutes at a time a few times before actually driving it again .
That's not how it works; with zero compression, there is also zero suction. If the exhaust valve was the guilty party, then as the piston descended on the intake stroke, it would have been easier for the exhaust from other cylinders to fire into the cylinder than it would have been for the plenum mixture to get in there. Air always moves from a high-pressure are into a low pressure area. The plenum is low, especially at idle. The exhaust system is higher.
In fact; it is not uncommon for exhaust to scoot right across the piston and into the intake, where the following cylinders all get a piece of it, cause that intake cycle is really long. But there may be a battle going on in there, if the exhaust is still somewhat working, as in your case. So who's to say exactly what was going on, but certainly not a gas-washed cylinder.
IMHO, looking at the piston-top to is a waste of time. If the lifter preload was correct, then the head has to come off.IMO. That particular valve/guide needs work,and I would be checking all the rest of them too. And maybe even the other side.Once the head is off then you can see.
I just don't have money to build a second engine.
BTW
I have reused Fell-Pro 1008s at least 3 times. That's why I use 'em. Your results may vary,lol......
