Rb26 High Oil Pressure?

[I_heart_rb26:)]

Brought the car last week and changed the oil today, was reading about 2.5kg/cm2 on the aftermarket greedy gauge and pretty much the same on the stock gauge

After changing the oil and overfilling a litre to accommodate for the remote filter kit and oil cooler the oil pressure is now reading 5kg/cm2 at 1500 rpm when at operating temperature 80 degrees, anyone knows what's up or is it nothing much to worry about? Has a tomei pump

[Moodles2]

5kg/cm2 is too high for operating temperature in my opinion unless that's how the pump was configured and something the previous owner did to mask the high oil pressure to make it read 2.5kg/cm2 (running low on oil, oil heavily dilated by fuel etc).

How much came out and how much exactly did you put in?

What oil and weight did the previous owner use, and what oil did you use (maybe too thick)?

What was the old filter, and what is the new filter (might be blocked/faulty)?

[I_heart_rb26:)]

Was a bit low when I dumped it rough guess about 3 litres came out

I put the same oil back in

Running 5-60w penrite

Cars idling at 1500rpm that's why I said its 5kg at 1500 rpm

Tryed a couple of things to bring the idle back down today but also no luck, could it just be tuned to idle at 1500? It's running a motec m800 computer and has a single throttle body instead of the 6 individuals

[I_heart_rb26:)]

Oh and I changed the oil filter r145a

And put in a lil more then 5 litres

Edited May 19, 2012 by I_heart_rb26:)

[Moodles2]

I see 2 problems. 3l might explain why the gauge read 2.5kg/cm2. The other is the oil choice w60 (hot rating) is way too thick for a RB26, w40 is the perfect one (only reason to run a 60 weighted oil in an RB is if the engine tolerances were built for it, or it has massive blowby problems, or perhaps a track-only car)

[I_heart_rb26:)]

Ahhk

Well it has a built motor and just seen everyone was running 10-60w so thought it was ok

It's done 5000k's on this oil

It has 272 degree cams and a t51r turbo so its gunna be revving pretty high

If you still reckon 40w is the go I'll go get some next week and dump what's in it and see how it goes

[Moodles2]

Should really be running whatever the engine builder recommended.

[I_heart_rb26:)]

Awk thanks man

I'll ring the guy who built the car and try get ahold of the engine builder

But running 5 bar at 1500 will it do any damage?

I think I remember seeing it only raising to 8 bar at 9000rpm

Only drivin it once only 500 Metres down the road

Was no metal in the oil I dumped or in the filter but I didn't cut it fully apart

[mico]

8 bar is ok for 9k rpm

[I_heart_rb26:)]

Cheers everyone for the ideas

Problem found

Jiffo inboxed me and guessed what it was straight away

The last oil filter didn't have a anti drain valve in it and the new one does

The inlet and outlet hoses on the remote filter are back to front

[I_heart_rb26:)]

Actually not sure

It only dropped one bar on cold start and didn't seem to want to run so I switched it back just incase

Was doing the same thing after I switched it till I gave it a lil rev when I was starting up

After checking a hosing diagram on the net it seems to be done right, could the tomei pump just be adjusted that high as they have a external regulator on them dont they?

Edited May 20, 2012 by I_heart_rb26:)

[Moodles2]

The anti-drain back valve is just a rubber flap that keeps the oil inside the filter on shutdown so there is oil in the filter on startup. I asked which filter came off as you could have the wrong filter (filter relocation kits sometimes need a different filter) or a faulty filter.

2kg/cm2 would be perfectly normal for a unopened RB26 (with factory oil pump) at idle at operating temperature, because the engine is built and has a higher flowing pump (different oil restrictors too etc), it's hard to say what is safe or not.

[I_heart_rb26:)]

Oil filter relocation and cooler kit is a grex

Are they compatible with just standard filters?