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Old 03-11-2019, 05:03 PM   #4
jaykay
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Join Date: Sep 2009
Location: toronto
Posts: 2,668
There is a 997 oil pump pressure regulator upgrade that can be done. IIRC it regulates oil pressure on start up. Just search on here and you should find it....I can pull out if you don’t

It maybe that your plunger is sticking if the pressure is over spec. I have yet to change mine so this is all parroted info. It may fix your issue though
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