Compression test for Nitrous - Honda Prelude Forum

jtcdudeman · 09-11-2003, 10:57 AM

Ok i just ran a comp. test on my engine, it has ~ 157k miles on it, the test yeilded this:
1: 202
2: 202
3: 197
4: 195
Those #'s good enought to run a NOS dry kit on?

Also the on i labled one(the cylnder closerst to the pass side) had oil all in the cylnder, that cant be good.....I know i was running bad yesterday like it had a fouled plug so i went and got plugs and ran the test today, what do you think caused the oil.

axion68 · 09-11-2003, 11:49 AM

those numbers don't look bad, the spread between them is pretty close so you should be fine. As for the oil in hte one hole, that sounds kinda weird since you have good compression in that hole. Put a new plug in there and see how it fairs.

laughin2.2 · 09-11-2003, 01:12 PM

it could have leaked in through the valves or the pistons. Either way it could have given you artificially high compression numbers in that cylinder if the rings are bad.

Preyluder · 09-11-2003, 04:22 PM

If you're really concerned about that oil "spillage" problem in the cylinder, check the piston and look at the oil control ring (the bottom ring. Check for cracks, etc. It could be coming from the valves as well, as Kris said, OR maybe one of the oil drain holes is malfunctioning in the block, you just never know until you tear it apart and look at it.

Your comp. is good though. Are you h23 or h22?

jsmooney · 09-11-2003, 06:13 PM

f22a4 <cough> <cough>