818 engine smoke

[JJFlanagan]

2.0 JDM WRX engine smokes when pushed hard but fine if driven normally. Turbo has no play, compression good and vacuum good.Any ideas on what would cause this?

[Bara83]

I know Im way late for this, but blow by and PCV system also could be a cause. Normally we start with compression test, than install a catch can.

Bara

[grayghost]

I know Im way late for this, but blow by and PCV system also could be a cause. Normally we start with compression test, than install a catch can.

Bara

the subi motor has oil RETURN air vents around the motor. this will always cause some smoking.

[wallace18]

Take off oil filler cap with engine running and see if smoke comes from there. Compression test dry then with a squirt of oil in cylinder will tell the tale most times.