okay i decided to do a compression test on my b18B1 motor thats in my civic! the motor burns no oil runs a little rich etc.... does not burn not one drop of oil literally lOL..but mu compression numbers were 125,125,125,127 is that low? motor runs really strong though with no problems at all LMK what you guys think of this thanks for reading.

 

was the motor warm or cold when you did the test?

put a slight amount on oil in each cylinder before you test to help the rings seal and see what happens.

if they are still low then do a leakdown test to help pinpoint the problem.

and check your timing belt, its easy, and if its off a bit then your test will be lower

 

Look like good numbers to me. They are low but thats not what you look for unless there in the 40s.

 

Numbers dont really matter like stated, all you care about is to get even numbers across, you look fine.

 

my motor was cold! and did not use oil in the cylinders as well! and have a cheap comprssion gauge :/

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by -HONDA- &raquo;</TD></TR><TR><TD CLASS="quote">my motor was cold! and did not use oil in the cylinders as well! and have a cheap comprssion gauge :/</TD></TR></TABLE>

you did the check at wide open throttle.. right?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jayjay &raquo;</TD></TR><TR><TD CLASS="quote">

you did the check at wide open throttle.. right?</TD></TR></TABLE>

?????

never heard that one before and i'm a tech.

explain...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 94hatchling &raquo;</TD></TR><TR><TD CLASS="quote">

?????

never heard that one before and i'm a tech.

explain...</TD></TR></TABLE>

Thats how I have always done it.... and I am sure there are more members that do it that way aswell.

 

125 across is just fine. Don't worry about it and don't put any oil in the cylinders

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 94hatchling &raquo;</TD></TR><TR><TD CLASS="quote">

?????

never heard that one before and i'm a tech.

explain...</TD></TR></TABLE>

Yes you're supposed to do it at WOT. I don't know why but if you don't the numbers get a little skewed.

 

brain fart... thats right. just been a while since i've had something come through that we had to preform this test on. i spoke too soon.

 

yup tested under WOT

 

Just so people know testing is done with WOT so air can come into the cylinders to build up compression. If you have it close you could have very weird numbers since theres not enough air in the intake manifold.