Matt300ZXT

iTrader: (2)

1JZ-GTE, hasn't run for about a year, on engine stand with no valve covers or manifolds on so it's easy to put my hand up against the ports and feel where the air is coming from. Though, I did forget to check the dipstick hole in the oil pan during these as I felt the air coming from either the intake or exhaust each time, though I guess it could leak in two places at once, who knows.

The cylinders were rotated to TDC and 100psi of air was fed to each cylinder. Anyways, here we go:

1-25% intake leak
2-60% intake leak
3-35% intake leak
4-35% intake leak
5-75% exhaust leak
6-22% exhaust leak

2 and 5 look terrible. Anyone who is familiar with leak downs, does this sound like stuck valves/carbon, bad rings or blown head gasket?

Rcreegan

iTrader: (2)

holy heck! could be alot, bad valve seat, cam timing off, valves needs to be adjusted ...... the list goes on and on!

Matt300ZXT

iTrader: (2)

I had the exhaust/intake ports reversed, was thinking of a Nissan engine with the parts on the other side lol It was mostly exhaust valves leaking, not intake.

Most everyone I've talked to is leaning towards either carbon or a cruddy/rusty seat from it not having been run in a year. When some money comes up I'll pull the head and just have a basic rebuild with a basic valve job done to it and throw the head gasket from my OEM gasket kit on it with some ARP studs, that should clear up any problems the head has.