Just Finished 996 cluster into 986

[pilot4fn]

I swapped the OPRV (piston and spring + washer) to an updated version and after the change the cold start rattle disappeared as well as the engine seems more responsive from low revs.
This OPVR (Oil Oressure Relief Valve) should improve the low rpm oil pressure. The piston is a bit different shape adn also the spring is slightly longer.
I purchased these updated parts directly from local Porsche Center:
Piston 997.107.125.01
Spring 996.107.127.53
Gasket 996.107.123.50

Here's the old:


Here's the new:

[flmont]

Where is this OPRV located Thanks Frank

[obthomas]

front of the engine right at the bottom of the oil pump.

[pilot4fn]

Originally Posted by flmont

Where is this OPRV located Thanks Frank

[flmont]

Thanks pilot and obthomas,..I would not have known its located there.I have the parts and will do that ASAP..Thanks !!

[Seadweller]

Originally Posted by pilot4fn

I swapped the OPRV (piston and spring + washer) to an updated version and after the change the cold start rattle disappeared as well as the engine seems more responsive from low revs.

Just to be clear, updating this part stopped your cold start rattle? I'd be thrilled to death if it would work for me.

[pilot4fn]

Originally Posted by Seadweller

Just to be clear, updating this part stopped your cold start rattle? I'd be thrilled to death if it would work for me.

Yes, the cold start rattle is now gone after the OPRV update :dance:

[Vza]

Hi,Is this the cold start rattle many boxster owners complain about? Happens briefly at startup then immediately goes away. I have it as well. The oprv upgrade will solve it? V