oil pressure too low

Discuss the RB20, RB25 and RB26 series engines.
s14_sport
Posts: 1852
Joined: Mon Nov 14, 2005 2:01 pm

Post

Searched around and found this:

RB25DET is 1.0 at idle, 3.5@2000RPM and 5.6@6000RPM

I just changed to fresh 20w50 Castrol over the weekend
When the motor is at norm. operating temp

I'm at .75 bar or 11psi at 750rpms
2.2bar or 31psi at 2000rpms
5bar or 73psi at 5000rpms

I didnt rev to 6000rpms just yet because I didn't fully break in my new clutch yet.

My problem is that as the oil gets older I will see the pressure get slowly lower.
At idle before this recent oil change my idle oil pressure was getting near .6 bar.

I have a new oil pump ready to do the change.
Just wanted to double check that this is too low...


gawdzilla
Posts: 2028
Joined: Sat Sep 18, 2004 11:51 am
Car: none

Post

those numbers are low if you were running something closer to what the FSM recommends, which is 7.5w30. they are super low especially since you're running 20w50. could just be your gauge. how confident are you in it's accuracy?

s14_sport
Posts: 1852
Joined: Mon Nov 14, 2005 2:01 pm

Post

gawdzilla wrote:those numbers are low if you were running something closer to what the FSM recommends, which is 7.5w30. they are super low especially since you're running 20w50. could just be your gauge. how confident are you in it's accuracy?
I was running 10w40 amsoil before this and I was getting very similar readings. I changed to 20w50 to see if it increased any and it is still about the same.

I have Defi BF oil pressure sensor installed in my Greddy oil filter sandwich plate and I feel the gauge is pretty accurate.


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