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what should the standard oil pressure gauge be reading on an internally standard rb25det r33 s2 when cold and when warm? Asking this because i think my oil pressure sensor is playing up. was at the lights and it just dropped to zero then slowly came up but keeps reading lower than before. what else could be the problem?

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Should be something like this:

During initial start up should read ~6kg/cm^2 when engine is cold.

After it warms up it should be around 2 - 6kg/cm^2, depending on driving load. I found mine idles at 2kg/cm^2 when engine is warm & goes up to 4kg/cm^2 under normal A to B driving.

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Someone else posted this in another thread, good thing to keep saved somewhere.

post-51527-1244723310_thumb.jpg

hhmm... says on that chart that the idle pressure should be 1 kg/cm^2 for a RB25DET.

My car seem to idle at the 2kg/cm^2 mark, the gauge always stay on the line between the 0 & the 4 (see picture), unless that line means 1 & not 2?

%20gauge.JPG needle is at the read arrow mark when car is in idle (warm engine).

The other 2 values given in the table (2000 & 6000rpm) seems consistent with my car.

I'm getting paranoid now, does that mean I have a pressure problem as well? :) Or just inaccurate gauge?

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