Odd Oil Pressure Symptom

DrBacon · 06-22-2022, 03:59 PM

As previously mentioned, I'd guess the oil pump pressure relief valve is sticky and stuck open. Shims won't do anything to fix this other than just making it harder to open that valve in the first place. Replace the relief valve, it should be accessible if I recall right with only the oil pan removed.

THE BULL · 06-24-2022, 08:30 AM

Quote:

Originally Posted by DrBacon

As previously mentioned, I'd guess the oil pump pressure relief valve is sticky and stuck open. Shims won't do anything to fix this other than just making it harder to open that valve in the first place. Replace the relief valve, it should be accessible if I recall right with only the oil pan removed.

Yes and no, the added volume and pressure this pump puts out might be triggering the relief too early causing a massive dump of pressure making it seem like it's sticking which is why a shim would work. It would compensate this force by compressing the spring a bit more.

Rojoryu · 06-26-2022, 03:17 PM

I ended up getting a 2015 motor with 39k miles on it from an Infinity. I am having a shop install a full boundary pump assembly with +2 shims as well as remove the old motor and install the new one (hand surgery has me out of the garage for a while). Once it's all said and done I will do a new pump on the old engine and keep it as a spare. Question, the Infinity has the stock oil cooler so is that just extra cooling power coupled with my 34 row?

06-22-2022, 03:59 PM	#1 (permalink)
DrBacon Enthusiast Member Join Date: Nov 2016 Location: Washington Posts: 286 Drives: 2014 Nismo Rep Power: 27365	As previously mentioned, I'd guess the oil pump pressure relief valve is sticky and stuck open. Shims won't do anything to fix this other than just making it harder to open that valve in the first place. Replace the relief valve, it should be accessible if I recall right with only the oil pan removed. Rojoryu likes this.

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06-26-2022, 03:17 PM	#3 (permalink)
Rojoryu Base Member Join Date: Sep 2021 Location: Charlotte Posts: 48 Drives: 2011 370z Base/Sport Rep Power: 16	I ended up getting a 2015 motor with 39k miles on it from an Infinity. I am having a shop install a full boundary pump assembly with +2 shims as well as remove the old motor and install the new one (hand surgery has me out of the garage for a while). Once it's all said and done I will do a new pump on the old engine and keep it as a spare. Question, the Infinity has the stock oil cooler so is that just extra cooling power coupled with my 34 row?