Just did a compression test myself today...

140-145 on all cylinders.. wtf? i thought 170-175 was the compression on b18a/b's?

Maybe my engine is getting in bad shape, even though it doesnt really seem like it, I dont use any oil and i have 3200miles on this oil..

Spark plugs 1-4 diodes ont he plugs all were a tan color, none had oil on the plugs, cept for some reason spark plug from cyl 3 had oil on it..

The engine WAS warm, and i did this myself, maybe the true compression reads out when cranking? but the tester still said 140-145 on all of em... any thoughts??

 

you have to have someone keep the throttle body open while you crank the car..try it again like that ibet your numbers will be up'ed

 

Dohhhh.. thanks man, is 140-145 good for closed t-body??

 

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Look what you should just do is drop an sr-20 motor under your hood and you will like the results of your test.

 

hah too bad im not sure wat an sr20 engine is

 

what the 98nissan sentra se r engine code is...SR20det is the silvia engine from japan is and what most people swap into their 240's

 

they dont have a spec for a closed thottle body compression test.

 

ok did it agin on a semi warm engine, t-body open now, and it read 160 on all cylinders, is this decent?

 

yes thats fine, you really want is consistant compression across all cylinders.