Motor is a OBD1 JDM H22A. Not sure exactly how many miles. Here are the compression results:
#1 - 165
#2 - 155
#3 - 155
#4 - 155

Not exactly sure if this is too low or not. Also did a cylinder leak down test afterwards and held pressure no problem. Any input??


EDIT: Alright, so I did the test again this time with the throttle wide open. I got 230 all the way across. So these are pretty good numbers, yeah?



Modified by ozzyman at 3:39 AM 4/22/2004

 

Anyone??

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ozzyman &raquo;</TD></TR><TR><TD CLASS="quote">Motor is a OBD1 JDM H22A. Not sure exactly how many miles. Here are the compression results:
#1 - 165
#2 - 155
#3 - 155
#4 - 155

Not exactly sure if this is too low or not. Also did a cylinder leak down test afterwards and held pressure no problem. Any input??</TD></TR></TABLE>

That is fine. If you ever do a compression test, and the results are like a 20 spread then something is wrong. Those numbers seem to look fine

 

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

That is fine. If you ever do a compression test, and the results are like a 20 spread then something is wrong. Those numbers seem to look fine </TD></TR></TABLE>

Thanks man. Good lookin out.

 

ok, they are low, but also consistent. since you said all cyls held air fine, i wouldnt be too concerned

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blackeg &raquo;</TD></TR><TR><TD CLASS="quote">ok, they are low, but also consistent. since you said all cyls held air fine, i wouldnt be too concerned</TD></TR></TABLE>

Alright, Thanks.

 

did you hold the throttle open?
#'s are even, but low.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mmuller &raquo;</TD></TR><TR><TD CLASS="quote">did you hold the throttle open?
#'s are even, but low.
</TD></TR></TABLE>

Hold the throttle open?? No I didnt. Whats the point in this?

 

numbers are looking way low... is this cold?


Warm H22 w/ open throttle body... we were getting on 280 across all 4 on a bone stock H22.

Mind you all compression testers are different... but honestly a LS motor will compression test at 180... type R motor will hit 220+ with ease... JDM type R will hit up there with the H22's...


They are compression monsters.

When you do a compression test... have the driver floor the gas pedal... otherwise you are trying to fill up the cylinders with only letting a straw sized amount of air in.


Anyway if you are doing a proper compression test, go to a dyno and see what type of #'s you lay down and how much oil you consume.

 

What I did was take out my ECM 15 amp fuse, and just turn the motor over 5 times. I didn't know I was supposed to floor the gas pedal. Would that bring my compression up if I floored it?? Also our compression tester only reads up to 250.

 

yea its supposed to be done at wide open throttle and at normal engine operating temperature

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ozzyman &raquo;</TD></TR><TR><TD CLASS="quote">... I didn't know I was supposed to floor the gas pedal. Would that bring my compression up if I floored it??</TD></TR></TABLE>Yes it would. Crank till the pressure stops increasing.

But remember, compression gauges are different. If your gauge has a larger internal volume, that'll make it read lower.

 

Thanks for the reply guys. I'll do another compression test if I have time today.

 

TTTTTTTTTTTTTT

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ozzyman &raquo;</TD></TR><TR><TD CLASS="quote">
EDIT: Alright, so I did the test again this time with the throttle wide open. I got 230 all the way across. So these are pretty good numbers, yeah?

Modified by ozzyman at 3:39 AM 4/22/2004</TD></TR></TABLE>

sounds good to me, if you want to see if your rings are a lil worn, throw a lil (like a teaspoon) of oil in each cilinder and read pressure.

Remember:
WOT
Crank it till the number won't go higher
Take all spark plugs so the starter won't have to overcome much compression
Warm engine
Disconect spark anyway you can

 

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

sounds good to me, if you want to see if your rings are a lil worn, throw a lil (like a teaspoon) of oil in each cilinder and read pressure.

Remember:
WOT
Crank it till the number won't go higher
Take all spark plugs so the starter won't have to overcome much compression
Warm engine
Disconect spark anyway you can
</TD></TR></TABLE>

Thanks man. Good lookin out man.

 

well either your motor and mine are pieces of crap or were normal cuz i got the same thing 2 days ago when we did a compression test. its a jdm h23/vtec. but hey mines doesn't work right now and i dont know why.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GZERO &raquo;</TD></TR><TR><TD CLASS="quote">... Disconect spark anyway you can</TD></TR></TABLE>Disconnect fuel, too. You can probably pull an ecu fuse somewhere to disable both.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b18c1civic95 &raquo;</TD></TR><TR><TD CLASS="quote">... cuz i got the same thing 2 days ago when we did a compression test. its a jdm h23/vtec. but hey mines doesn't work right now and i dont know why.</TD></TR></TABLE>If you get 230 compression on all 4, then you know it's NOT because of bad compression...