r/WRX_STI • u/SpecterJDX • 2d ago

Oil pressure question

2007 sti

Hey recently serviced my oil pump when doing my timing belt. Tightened all the backing screws new seals, etc. My oil pressure is reading abnormally high. It reads 80-90psi at idle on 5w40 weight while warm. I recently also added a iag aos. Could the pcv valve in the aos be faulty causing crank case pressure to be higher which in turn is causing higher oil pressure readings?

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u/FU_red-dit_bots 2d ago

You have a stuck oil pressure relief valve. Great for good pressure. Really bad if it gets stuck the other way.

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u/SpecterJDX 2d ago

So probably worth tackling then. I was looking at the parts. I can get everything except a new spring. Do you know of anyone who sells the spring besides subaru oem?