Rb25det oil pressure boffins

Discuss the RB20, RB25 and RB26 series engines.
Snoozer97
Posts: 1
Joined: Sun Aug 27, 2023 4:19 am
Car: 1991 Nissan 200SX RB25DET neo

Post

Hi people

I’ve got an rb25det neo. Oil pump has been reconditioned. I’m getting consistent oil pressure, however, it’s quite low. At 80•c at idle it’s about 0.8bar and highest it ever gets at 7k rpm is at 3.2bar. 15w50 fully synthetic.

I have an aftermarket sensor that is running to the maxxecu.

My question is, is my sensor in the correct place? It doubles up at a temp sensor. If I wanted to check it with a mechanical gauge, where would I plug it in?
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macgiver
Posts: 1625
Joined: Wed Jul 04, 2007 10:21 am

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Looks like a remote filter setup ? In any event the bottom pic w/blue plastic crimp looks like an OEM idiot lite pressure ' tap ' there it's PROBABLY = output of oil pump.

The top pic w/blue FITTING adapter pointing to 2-o'clock ......is POSSIBLY an AFTER the filter pressure , like so as to clearly see any differences , a clogged / restricted filter - you do the math (subtract the difference ,ya?). And IF it's that top pic w/low readings , may be something " restricting " ...?
And so you MAY want to temporarily tap that lower idiot light galley with a mechanical gauge , note pressures .And then decide to try to remove / eliminate the installed filter - write down ALL pressures , notes and observations and you may be ON TO IT ?
p.s. YES that's in my opinion DANGEROUSLY LOW pressure WHERE your CURRENTLY READING - sensor 'setup ' , again, STILL possibly reading wrong too ? :yesnod .....So tapping a mechanical gauge to the top pic blue fitting area you may VERIFY the sensors readings ,also is there a check-ball bypass? ..workong?...WRITE ALL THIS SZHITT DOWN ! :lolling:


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