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Old 02-06-2018, 04:54 PM   #21
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Put in the updated spring and piston .Put a mechanical gauge on it today 10 psi when motor is hot with 5w-40 oil. What would be the thickest oil I could run .Live in the south west.
Sounds a little low to me but isn't the pressure switch set at 7 psi?
If it were me, I would try a heavier oil, Mobil 1 5W50 or 15W50. 5W50 is Porsche approved in our cars. You'll most likely get a couple (2-3 psi) more at hot idle. How about the oil filter? What is your setup? Stock or aftermarket?

Walmart has Mobil 1 15W50 on special for $27 for 5 quarts.

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Old 02-07-2018, 06:23 AM   #22
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I have no idea what the sending unit is set at . Its one for a 996 has the warning light and pressure gauge. The electric gauge is not connected yet . For an air cleaner I'm using a cold air kit, Borla exhaust.Thank you all, you guys have been a great help . I have had the car for a little over a year so I think my biggest problem is I probably used oil that is to light from the start . I had no idea what was used in the car. Started with 0w-40...then 5w-40....Now was thinking 15w-50......What would you all think about a 60 weight oil ..?
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Old 02-07-2018, 08:30 AM   #23
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I have no idea what the sending unit is set at . Its one for a 996 has the warning light and pressure gauge. The electric gauge is not connected yet . For an air cleaner I'm using a cold air kit, Borla exhaust.Thank you all, you guys have been a great help . I have had the car for a little over a year so I think my biggest problem is I probably used oil that is to light from the start . I had no idea what was used in the car. Started with 0w-40...then 5w-40....Now was thinking 15w-50......What would you all think about a 60 weight oil ..?
I think that if you need anything more than a quality 5W-40, something is wrong with your engine.
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Old 02-07-2018, 10:38 AM   #24
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I think that if you need anything more than a quality 5W-40, something is wrong with your engine.
JFP, are you refering to exesive bearing clearance or a worn oil pump?
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Old 02-07-2018, 12:48 PM   #25
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It could be either. What is lacking here is proper "hands on" system diagnostics. If the OP has not done the oil pump piston and spring update, which was introduced specifically to address this issue, he needs to do so. If that doesn't raise the oil pressure, he needs to pull the oil pump cassette and examine the gears for pitting or excessive wear. If there is nothing wrong in the pump, the engine has become "loose", and is leaking the oil pressure internally, which requires a rebuild/replacement. But the ONLY way to know what is going on is to start looking........
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Old 02-07-2018, 02:34 PM   #26
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If the OP has not done the oil pump piston and spring update, which was introduced specifically to address this issue, he needs to do so.
I am sorry for hijacking this tread, but does the piston and spring update applies to the 3.4 987 as well..? Thanks!
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Old 02-07-2018, 03:03 PM   #27
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I am sorry for hijacking this tread, but does the piston and spring update applies to the 3.4 987 as well..? Thanks!
You would have to check that with a good part department; at some point, the retrofit parts became the parts in the car from the factory, but that would require checking the VIN number to be sure.
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Old 02-07-2018, 03:34 PM   #28
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You would have to check that with a good part department; at some point, the retrofit parts became the parts in the car from the factory, but that would require checking the VIN number to be sure.
Thank you JFP!

I will ask Luke at Sunset
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Old 02-08-2018, 05:27 AM   #29
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JFP Can the oil pump be removed with the motor in the car ? I did do the oil pump bypass with updated spring and plunger .Thanks for your help sir..!
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Old 02-08-2018, 09:06 AM   #30
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JFP Can the oil pump be removed with the motor in the car ? I did do the oil pump bypass with updated spring and plunger .Thanks for your help sir..!
Yes, and as the cassette shares the metal gasket with the water pump, it is a good time to replace the water pump and the oil pump drive shaft which is an investment cast piece of crap that is known to snap. LN has a chrome moly replacement for about $20.
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Old 10-31-2018, 11:48 PM   #31
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About to replace the valve/spring on mine. After installing is it recommended to "prime" the engine before starting to build oil pressure? Or is it ok to start immediately after install?

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