[S14mc]

Originally Posted by rex2sx

Leakdown Test IS NOT for oil, its for compression leaks. Tell me, if your valve SEATS are sealing like they are supposed to. While the valves are CLOSED doing a leakdown test, how are bad umbrella (aka valve) seals going to show up? They ARE NOT

BTW it said that 20% cylinder leakage is still ok. Read the gauge, 20% is still green, anyway. I wouldnt bee too worried until it passes 30+

Honestly, i think they is something called a valve guide test but other than that, without tearing the motor apart, its hard to daig leaking valve seals.

Also, how is your 02 sensor responding? Are the PIDs jumping back on forth showing rich/lean?

Oil does ruin your 02 though..So if its not switching like it should be..it might need to be replaced after the leak is fixed

Good point. I'll see if I can borrow a wideband.