Leak Down Test Percentages
 

I have researched but came up with nothing, does anybody know factory nissan spec on leak down percentage? Thanks for your help jason.

I know on the 350 it was 20% or less was considered within spec. But 20% is on the high side IMO. I recall this from my FI install. For this matters on a OEM block. Make sure whoever does this uses a good quality tool for this job for it is well know to get erratic results if not done properly. But a dealer should be able to let you know the specs from the service manual.

I know with my 350Z I had 35-50 and they replaced my engine.

from what i have found 10 - 20 is good and 20 -30 is meh and after 30 is game over for the engine