Leakdown test on rebuilt engine

Leakdown test on rebuilt engine

OK, thanks all, so more stupidity on my part(that tanks always full ffs)....I drilled a 3/32 hole. Too big to be able to differentiate between the 2 gauges. Hardware store tomorrow for a 3/64 bit.
Thanks again for the reassurance being a new build. @Bennoel 10 was generous enough to loan me his 4spd bellhousing, so I wanna be as sure as I can I'm good before I pull it from run stand as I wanna give Noel his bellhousing back.
Thanks!

OldmanRick said
Steve, don't panic just yet. Imo, the rings don't fully seat until the've been under load, like several 4grand decel's in gear, and that can't be replicated on a run stand. Just 1 cyl is a concern thou. Wish i had a quick solution, but if i think of something i'll chime in.

AJ/FormS said
part way only

dartfreak75 said
Im far from a professional but imo that is probably from the rings not been seated yet on a new motor! Mine did the same thing when the engine was new I could crank it over by hand and hear air escaping between the pistons and walls down to the oil pan. I freaked out of course. After the engine was broken In and I put a couple hours on it is no longer an issue

RustyRatRod said
Steve, even when the rings seat 100% they will not seal a constant pressure 100%. There will always be some air that gets by because the rings have gaps. Go ahead with your plans for that engine. It's fine.