EJ25 engine questions

[Scott01GT]

I am no way an expert on motors my father owns a garage but lives 3 hours away so were trying to figure out whats wrong with my car i need a couple questions answered, i got spoken too about making useless topics haha but i just need to figure this out Huffer.

I drive a 01 legacy gy i need to know whats the normal oil pressue, and normal cylinder compression on these motors.

[TheAngryPidgeon]

I purchased an imported JDM EJ25 DOHC for my '98 BD, which was tested prior to installation.

The results I was given were:

Compression: 180, across the board.

Oil Pressure: 80.

Hope that is helpful.

[Huffer]

If your dad owns a garage he should have access to Alldata or a repair manual system that should clearly detail the specs for cylinder compression and oil pressure...

I myself don't know the answers to this.

[decke48]

14psi @ idle. 40psi @5xxx rpm at operating temps, is what alldata said IIRC. compression should be higher then 125psi on the cylinder. compression should be roughly the same for all cylinders

[99gtlimited]

^^+1 on that

125 is still pretty low though unless the motor is really cold. a warm engine should be around 150-160 psi for each cylinder.

[KAG]

a warm engine should be around 150-160 psi for each cylinder.
Yep. My BE was an even 160 across all cylinders when I did a compression test a few months ago.

[impreza_GC8]

Seems like my NA EJ25 runs around 40 operating. My turbo'ed EJ25 runs more I think, and it seems to fluctuate a lot more.

[Scott01GT]

thanks guys appreciate it