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pilot4fn · 10-30-2020, 10:31 PM

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:

10-30-2020, 10:31 PM	#4
pilot4fn Registered User Join Date: Jul 2019 Location: Finland Posts: 341	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: __________________ Boxster 2.7 2001 Manual