So i ordered a H22A Type s engine from JDMsource. They told me the compression in all cylinders was good before it was sent. Fastforward, motor is now in the car. Clutch is very bad needs to be replaced, smokes comes out form the tranny so car can't be run long.

My issue is that we compresion tested the cylinders and across the board they read 160-165 w/ the exception of one that read 90. This is bad i know. I contacted the company and they said i needed to run the engine for a while as they can lose compression. ok, so i have ordered a new clutch to get it fixed. But in the meantime i play dumb to the company and ask what good compression for each cylinder should be when it returns, and the guy says anything over 150 is good. This worries me. All my research shows that on this engine, 11:1 compression ratio, each cylinder should have atleast over 200 psi in each. Do I need to go Hulk Smash on these people? Any help would be appreciated. The clutch will come and be put in next week but i still feel like that if they think over 150 is good i'm screwed.

 

as far as i know. they are suppose to be close together.. but for a jdm motor to have roughly 160... I think thats kinda low... when i bought mine, (not from jdmsource though) it was 210 across the board.. with a 30 day startup warranty.

 

Yeah, i found the email saying that before they sent it it had over 200 across. Hopefully once i fix this clutch i'll be able to run the engine and everthing will go back up

 

put a little 2 stroke oil down the plug holes before you start it, it'll smoke like hell for a bit but it should help create a seal between the rings and the cylinder wall again, if your rings are still good.

when it stops smoking, check your compression again.

You're right, JDM should be over 200, mine pushes 220.

 

bro, just the fact that the one showed 90 you need to hulk smash! thats way off from the rest you only have a 10 psi play between the cylinders if one is 10psi or lower then the rest you have a problem. take a spoon full of oil and drop it into that cylinder when doing the check if the compression rises your rings are bad if it stays the same its your valves.

 

^^ Hulk smash FTW!

If you can't get the compression to come back up, that is.

When a motor sits and dries out the compression can drop until its run for a bit again. So definitely try to bring it back with 2 stroke oil and running it for a bit before you get too bent up over it.

Just don't go revving the **** out of it until its gone through a couple hot/cold cycles

 

ya but it dont make since that the other one is at 90 psi there is something fishy

 

It never hurts to try, we may be saving him from having to Hulk rage ...

 

thanks alot guys. i"m waiting on my clutch to get here so i can even run the damn thing. Just bad news bears so far. when i get that worked out i'll let ya know what happens

 

ya man good luck to you