Rb25det Oil Pressure

[mr-r33]

hi guys just went for a good drive and as you start to come on boost the oil pressure gose up to 8 on the guage...what is the go with that...thats with the engine sitting on cold..i dont have the VVT connected yet and it pops out the dip stick but yet the engine has no blow by????

[mr-r33]

oops for got to say the oil i'm running is castrol EDGE sport 5W-30

[DVS JEZ]

ok so whats the problem? is it that the dip stick pops out, or the oil pressure gauge goes up when the revs increase? (which is normal)

[The Dan]

Oil pressure is supposed to go up when revs increase. That's what engines do.

If it doesn't have excessive blowby then buy a new dipstick. If it pops that out, then you either have an incorrectly plumbed catch can, a blockage in the factory breather system or cam cover or you do have excessive blowby and just don't know it

[paulr33]

are you sure going to 8kgcm2 on a rb25 is normal?

i dont think ive ever seen 8gkcm2 oil pressure

does the idiot light come on too?

[mr-r33]

are you sure going to 8kgcm2 on a rb25 is normal?

i dont think ive ever seen 8gkcm2 oil pressure

does the idiot light come on too?

nope no idiot light

when hot it sits just under the frist line when driving gose up past 4 and some times gets up to 8

[paulos]

Werid mine cold starts at 6 then aftr 10 mins and some heavy foot it goes to 3 yet my temp never goes past 1/3 of the way up

[paulr33]

check your oil level and look for oil leaks

something is missing, it should never hit 8gkcm2

[The Dan]

check your oil level and look for oil leaks

something is missing, it should never hit 8gkcm2

8kg-cm2 is only 113psi.

If you are revving the engine when it's cold......this is normal.

Also, if he had an oil leak from somewhere, oil pressure is likely to drop.....not go up

[paulr33]

no i mean, less oil in the engine = higher pressure

ie i wouldnt expect a normal rb25 to hit 8gkcm2 under normal warm conditions

stone cold it might get near or just on, but when warm it shouldnt

[The Dan]

no i mean, less oil in the engine = higher pressure

ie i wouldnt expect a normal rb25 to hit 8gkcm2 under normal warm conditions

stone cold it might get near or just on, but when warm it shouldnt

yeah but he said his engine was cold

[paulr33]

ah yeah if he is saying cold then that is less worse, but even still 8kgcm2 i would tag as very high and i would check oil level

[mr-r33]

check your oil level and look for oil leaks

something is missing, it should never hit 8gkcm2

if i get what your saying it is like this low oil in engine can cores high oil oil pressure???

Edited August 8, 2010 by mr-r33

[JonnoHR31]

standard gauge isnt all that accurate but even if it is 8kg isnt that high. myne sits on 6-7 at cold idle, hits 8 (end of the gauge) with anything more than 1500rpm when stone cold, even with 5w-30

[snozzle]

an old r33 gtst of mine went up to about 7kg on a cold start and if i revved it to around 4000rpm within the first few minutes of driving it would also hit 8kg. Nothing wrong with that. My GTR gets about 7 wen cold but doesnt really hit 8 i dont think, ive never really revved it passed 4k when cold. It then stabilises down to 4 in most gears while driving by the time i get to my destination and idles on 2.5-3

in regard to blowing out the dip stick, the info on how to find and/or fix the problem is in post 4 of this thread.