92LT1RS

yeah, so I was using one of the air chucks that you screw into the spark plug hole to pressurize the cylinder while I removed the valve springs. On 4 and 8, there was a very obvious rushing of air coming from the bottom of the block while all the rest of the cylinders seemed to seal pretty good. Is that a bad thing?

This after I found an old bearing half in the bottom of the pan and the oil pickup almost completely clogged with old gasket material. I had already decided to go ahead and pull the engine down and check everything out, might as well do new rings/bearings while I'm at it and check the measurements on everything while its out.

shoebox

Some air is always going to escape past the rings. It's not like filling up a tire. But, an obvious difference from one cylinder to another would likely mean a sealing problem. A leakdown tester would tell you just how bad.

92LT1RS

yeah, this post was kinda tongue-in-cheek. the other 6 cylinders you could harldly hear a hiss, 4 and 8 sounded almost like the quick-disconnect on the airline wasn't connected all the way they were leaking that bad. I've already torn it down past the point of being able to do a leakdown test. Figured I was already this far, might as well go for a total refresh.