Please help with my Compression Test

[F20A CB7]

I want to do a compression check on my sohc 2.0.
I can not find the proper #s needed fo a good test, a friend told mt 140 to 180, can some chime in please so I kno wat #s to look for.

And how far apart the numbers can b from each cylinder?

[illinois_erik]

hey man here ya go:

nominal 178psi
minimum 135psi
max variation 28psi

Taken from FSM

[F20A CB7]

Is this for a 2.0 sohc?

[F20A CB7]

Remove main relay, and ext coil wire.. take plug outta cynliner 1. And they put the test in. Repeat for next 3 cynliders.. Now how many times should I repeat for each cylinder? Turn the key 2 or 3 times?

[illinois_erik]

Remove main relay, and ext coil wire.. take plug outta cynliner 1. And they put the test in. Repeat for next 3 cynliders.. Now how many times should I repeat for each cylinder? Turn the key 2 or 3 times?

I just unplugged all the plug wires, used some vice grips to hold the throttle wide open and cranked it about 5 times.



damn and I totally read over the part where you said SOHC lol...

the numbers are the same between 2.0 and 2.2's the 1.8 has a 7 psi difference between nominal @ 171psi

[F20A CB7]

Ill post up #s

[illinois_erik]

Ill post up #s

If you get really low numbers, try squirting some oil down the plug hole. You can get really varying numbers between a dry and wet test. If the numbers significantly raise for a wet test then youve got bad rings

[F20A CB7]

Thaks erik for the help.. my friend wanted me 2 post it on the board to see what others say, if any1 chimes in.

I did the test.... I let the car wam up for 3 mins.. friend lives 10mins away. So the engine was warm. But not 100% fully warm like I've been drivin for an hr.

I cranked it a few times, 2 different occassions.
Cy1 was 200 and 200
Cy2 was 210 and 210
Cy3 was 210 and 210
Cy4 was 210 and 210

[Quashish]

that seems pretty good to me. I have no idea what OEM spec compression should be but, the fact that 3/4 of your cylinders are the same should be a good sign.

bump it so someone else that hopefully knows can answer because im interested too.

EDIT: I did find this video

[illinois_erik]

that seems pretty good to me. I have no idea what OEM spec compression should be but, the fact that 3/4 of your cylinders are the same should be a good sign.

bump it so someone else that hopefully knows can answer because im interested too.

EDIT: I did find this video

i answered his question like 13 days ago about compression numbers... I dont think them being that high is good either. all about the same # is good though for sure.

[Granite CB7]

That video shows an F20A DOHC, those have 9.5:1 compression. I think the F20A SOHC also has 9.5:1 instead of 8.8:1. That would explain the higher numbers I suppose.

[Quashish]

Oh my bad, i didn't see the SOHC part.