can someone give me a quick hand here (compression testing)

[civiclxb16]

OK guys i am going to look at a prelude today and i want to check the compression. it has an h22 in it but the it has high miles so i wanted to do a compression test before i take it home. what should the numbers read? 220? thanks guys

 

[posol]

there's no set number on what it should read. the thing to look for is a variance in one or more cylinders.

If you get 210 220 220 210 its good.
if you get 220 5 200 100 its shot.

 

[civiclxb16]

ok so if i see like 180 180 180 180 i am ok? this motor has 180k on it. i am not looking to race it. i just want to drive it everyday

 

[tab]

werd. It's the change from one to another that you don't want to see. And, (I don't like to start sentences with and) recheck if you get a fucked up number. I checked a friends' car recently, and found that one cylinder was very low. Like, 120,95,115,120. Finding that one cylinder was low, I like to recheck. That 95 rechecked at a 117 or something. It was fine.

It's just nice to recheck your work.