Oil Pressure

[SilverECR33]

Just noticed,

My rb25det oil pressure dropped, from the *4 Mark, down to the first line,

normally always sitted at the 4 mark, now its sitting at the first line *unmarked line*,

No oil leaks, I could find, some slight oil residue comming from rocker covers.

Oil level is fine, But have noticed turbo making slight werring or whining noice when boosting hard now.

Thinking that My oil pump could be showing its age..

anyone agreee? disagree?.

[SECURITY]

firstly i'd get that seepage out of the rocker covers fixed.

and its more than likely to be your turbo rather than your oil pump. a blown oil seal in your turbo will cause the lower oil pressure.

check for oil in your intercooler piping at the lowest point then report back.

[RPR33]

mine has always sat on the unmarked line on idle and goes to 4 when drivin is that norm?

[SECURITY]

on idle, 2bar of oil pressure is fine.

4bar when cruising is normal.

6bar + on high rpm is normal.

[SilverECR33]

firstly i'd get that seepage out of the rocker covers fixed.

and its more than likely to be your turbo rather than your oil pump. a blown oil seal in your turbo will cause the lower oil pressure.

check for oil in your intercooler piping at the lowest point then report back.

Pulled off front pipe (lowest pipe) , found small trace of oil residue, when i whipe my finger on bottom of the inside of the pipe,

I would assume this is normal?

[SECURITY]

more oil would be found on outlet side of the intercooler.

[SilverECR33]

OK, puleld off other pipe, No oil residue, on inside of pipe, or Very very little, also stick my infgers into intercooler, couldnt feel any oil.

[SilverECR33]

so i guess thats not it then? i mean wouldnt i see sum smoke also?

anyone got any idea?, or suggestions why it would loose pressure?

[SECURITY]

turbo oil seal could be at early stages, you might be using a thinner oil, you might even be mistaken that the car even has low oil pressure.

where does it sit on idle, cruising and high rpm?

[SilverECR33]

same pressure cruising or at idle. or not much change noticable.

oi is nulon high tech fast flowing 10-40w, for import turbos etc.

been using same oil since i got it.

havnt checked with full throttle yet.

Edited December 15, 2006 by silverbulletR33

[SECURITY]

same pressure cruising or at idle. or not much change noticable.

oi is nulon high tech fast flowing 10-40w, for import turbos etc.

been using same oil since i got it.

havnt checked with full throttle yet.

im asking for the actual pressures.

[SilverECR33]

OK cruising at 110, and giving it a bit, went just over the *4 mark.

thought it Might possibiliy have something to do with the viscosity of the oil, so i did a oil and filter change, and now back to normal.

now sitting on 4-6

So, Nulon Hi-Tech, fast flowing stuff, which is 10-40w, after 3900kms looses some viscosity which make the drop in oil pressure.

maybe ill try new oil next time.

theres gotta be something wrong for it to loose its viscosity only after that muc kms? or is this the norm?

[Links]

Or the oil sender is faulty... which is a common issue in the R33's..

But could also be the hot temperature with thin oil..

[tek_01]

should it be sitting at the 4 mark when it idling? isnt that a bit high?

my oil pressure are like security mentioned in the earlier posts, sometimes at idle its at about 1 bar tho which could be a bit low

[MANWHORE]

Sounds like the oil sender/guage is faulty.

Best bet would be to use a second guage to confirm that to make sure that it's not a major issue.

I don't think it's the oil pump, because if the oil pump was going, the oil pressure would be low, not high.

on idle, it should be around 2. If it's up at 4, that's reading twice as much, so i'd think it's the guage/sender

[MANWHORE]

I don't think there's anything wrong with the oil. For the pressure to double, that would have to be pretty majorly wrong.

That nulon oil is good stuff.

It could be anything mate. tempamental sensor? Or guage a bit lazy for a moment.

Just see if it happens again with this lot of oil.