Factory Compression sr20det S14A Kouki

[koukis14a]

Going to perform a compression test in the next few days on a S14 Series 2.

1) What is the factory compression for the engine, so i can compare the results?

2) When performing the compression test, is it better to do it Cold or Hot?

Thanks in advance!

[wawazat8402]

Yes, a compression test should be done once the engine is warm. I believe general consensus is 150psi ballpark with a nice tight grouping between the cylinders. Normally one of the cylinders returning a number outside of the group is cause for more concern than all of the numbers being consistently lower. Within reason of course.

Also, if the numbers are a bit low, you can add a tablespoon of oil to each cylinder and retest to see if the rings are the cause for lower compression.

[koukis14a]

Thanks,

When buying a car, apart from the compression test, how else can i make sure that the engine has been cared for previously?

[jr_ss]

Pull the VC and look for staining... Staining usually means old changes were few and far between.

[koukis14a]

VC = Valve cover?

[wawazat8402]

Yep, check the plugs while theyre out for the compression test. Also remember to pull the fuel pump fuse before cranking for the test and hold the throttle wide open.