Start Up Rattle - Part Upgrade to Eliminate

[lkchris]

Originally Posted by Oldcarguy

I think you’re talking about the oil pressure relief valve with the updated bevel and spring. There is no additional spring that holds pressure on the tensioners. No guarantee that this will cure the startup valve train chain rattle. Just Google ‘986 oil pressure relief valve’ for more info.

He could be.

Many don't know that at your Porsche dealer you can purchase either just a filter element or a complete assembly consisting of the plastic container with (obviously) a new relief valve plus of course the filter element. Not a bad thing to do periodically.

[ike84]

Originally Posted by lkchris

He could be.



Many don't know that at your Porsche dealer you can purchase either just a filter element or a complete assembly consisting of the plastic container with (obviously) a new relief valve plus of course the filter element. Not a bad thing to do periodically.

Chris, the oil pressure relief valve is different from the filter bypass spring in the filter housing which you're talking about. Look at a diagram of the oil flow for 986 and you will see the relief valve at the level of the pump. It's a cap over spring assembly that Porsche updated, and the newer part helps improve oil flow during cold startups with high oil pressure (that's my understanding of it at least). Ttgator did a good video of the swap with part numbers (adds 5 min to your next oil change)

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[Seadweller]

Originally Posted by ike84

Ttgator did a good video of the swap with part numbers (adds 5 min to your next oil change)

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I can't locate this video, so would you be kind enough to provide a link?

[ike84]

Originally Posted by Seadweller

I can't locate this video, so would you be kind enough to provide a link?

I can't seem to find it either but here are the part numbers. Ignore the TB housing.

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