Oil Pressure On Rb25det

[J-train]

I was wondering if anyone knew what pressure in PSI the oil system should be sitting at on an RB25det motor.

I have an Rb25det in an R32 and I just installed a oil cooler and an oil pressure guage. Obviously the oil cooler lines and cooler itself should sit at the same value as the oil in the sump.

On start up my oil pressure reaches 80PSI then works its way down to about 45PSI, it might just be the oil pressure going through the lines on start up and I am just worrying about nothing.

Thank you guys in advance,

Jarrod

[R338OY]

Do you mean 80psi cold start?

The oil needs more pressure on cold-starting to get it through the motor/sump/lines. When it's warmed up it'll flow easier, needing lower pressure to move it around.

Sounds fine to me unless someone else has another opinion.

[Aif]

my dash gauge is at 6 on cold idle and goes down to 4 on warm idle. it usually sits around 4 most of the time.

AiF

[nuclear_skyline]

the oil at start up will be cold, therefore thicker, meaning there is higher oil pressure. Once warm, it thins a litttle bit making it have less pressure...

[J-train]

Thanks guys. I had a good think about it today and that was the conclusion I came up with also.