Removing the OPRV
 

I'm some trouble unbolting the OPRV on my 87 944S. I tried removing the passenger wheel for easier access, but can't seem to break the OPRV loose. Any suggestions?

Thx

Use a 24mm (if i remember it right) with a 1/2" universal drive and extension extending out to clear the front bumper and a cheater bar. No need to remove the wheel.

i'll give that a shot, thanks man! for such a low torque bolt, it's a b*tch to get out. :-)

Pretty sure it's a 17mm. Other than that, just keep trying. The more extensions/swivels you try and use, the let applied torque you will have. Minimize!!

Once removed, change both the outside and inside "O" rings on the one piece OPRV.
999-707-144-40-M100 Oil Pressure Relief Valve O-Ring, Inner or Outer, 2 Per Car, 944 (1987-On), Each $2.50.
PP also sells the crush washer needed to prevent oil drips and future knuckle bleeding and bashing. =====N-043-815-3-M131 Oil Pressure Relief Valve outer Sealing Ring, 944 All, Each
Brand: Fischer & Plath $0.75

GL
John_AZ
1988 924s + 1987 924S

spray some wd40 on it and work it with a wire brush. mine was baked on from the outside and stuck to the block.

I had one so bad I changed the housing because that was easier than getting the OPRV retainer off.