Jump to content
SAU Community

Recommended Posts

Hi All,

I thought i would come to the experts. My RB20 is coming along nicely with a APEXI AVC-R boost controller, fuel pump, coil packs, air induction and full exhaust system and I love the results. On the weekend however I put on a new BOV and I noticed my oil pressure idleing is just above the zero and when boosting wont go above 2 (which is a quarter of the maximum 8). Why is this and would it be due to the BOV? Also how can this be tested or fixed.

I appreciate any help as I have not come across this before.

Link to comment
https://www.sau.com.au/forums/topic/139833-oil-pressure-low-on-my-rb20/
Share on other sites

Hi All,

I thought i would come to the experts. My RB20 is coming along nicely with a APEXI AVC-R boost controller, fuel pump, coil packs, air induction and full exhaust system and I love the results. On the weekend however I put on a new BOV and I noticed my oil pressure idleing is just above the zero and when boosting wont go above 2 (which is a quarter of the maximum 8). Why is this and would it be due to the BOV? Also how can this be tested or fixed.

I appreciate any help as I have not come across this before.

the senders normally whack out... but in my case i think my oil pump is screwed because the top end is making horrible noises.

I have an Autometer gauge which has replaced the stock oil pressure warning light sensor. It reads in PSI so i dont know if it will be any help to you but i use a 10-40 Motul oil in my RB20DET which is basically stock, on cold start i get around 60-70psi of oil pressure at idle, after around 5-10mins of driving it will read around 6-15psi of pressure at idle and rise to a max of around 45-50psi at 3000rpm when hot.

stupid question, but will pressure vary b/w oil?

i just changed my oil from a motul 4100 turbolite 10w-40 to motul 8100 xcess 5w-40 and ive noticed a pressure drop once the oil is warm. Previously it would sit close to 4 on the guage and no it doesnt rise above 2 once warm..

should i get a different oil?

engine is an rb20det btw

i got custom gauges put in, and my car on 15-50 mobil one, reads about 70 cold, and about 40 @ 3000rpm, but ideling it sits between 20-15 psi should i be worried can suply photos.

Note: mine did the whole read jsut above zero never gets above 2 thing, so i went out a put customs in

- to answer your comment, get ur mechanic to do an oil pressure test on it, and i would recommend getting aftermarket gauges, and leave the BOV out of it.

55yko

Edited by 55yko

as long as the oil pressure warning light is not illumminated, then all is ok

the stock oil pressure sender is dodgy on all nissan imports and won't give you anything even close to the correct pressure...

i recently installed an aftermarket gauge in my glovebox and find that:

when warm at idle it sits between 1-2bar

when warm and cruising/driving the oil pressure varies with rpm (can't see this on the stock gauge) and sits up around the 3-4bar area

obviously pressures are much higher when the oil is cold

gauge cost me $20 (ebay)

gauge cup $5 (ebay)

sandwich plate $30 (justjap)

not a bad investment and is hidden in the glovebox nicely :(

cheers,

Warren

My stock guage is all over the place.

Some days it reads like it should, others barly above the 0.

Its always been like that though, even with the old motor.

Quite funny actually as I've caught it going from crappy to normal.

Cruising along at 100km/h, oil pressure sitting on around .5 then all of a sudden with a sharp jolt the needly flicks up to just over 4 which is where it sits when the guage is playing nice, sat there for the next few days then decided to go gar gar again.

Wouldn't be too concerned. RB20's are cheap anyway, drive it until she starts making funny noises.

Guilt Toy.... I'd say your lifter problem was likely attributed to poor oil pressure. As I'm sure you already know. :P

Thanks for all your help everyone. I'm just going to drive the bloody thing and have a mind set that the oil pressure gauge is faulty. If it goes boom I will just chuck a RB25 in it anyway as I planned on doing next year anyway.

hi im wondering if anyone could help me on a simalr topic?

i have a problem with my rb26 regarding with the oil pressure, everytime i hit high revs or hit boost the oil pressure goes down to 0 and the warning light will turn on.

if i drive normally without going over 4-5000rpm its ok, the pressure doesnt drop and the warning light does not turn on.

i would appreciate any help thanks.

cheers,

hi im wondering if anyone could help me on a simalr topic?

i have a problem with my rb26 regarding with the oil pressure, everytime i hit high revs or hit boost the oil pressure goes down to 0 and the warning light will turn on.

if i drive normally without going over 4-5000rpm its ok, the pressure doesnt drop and the warning light does not turn on.

i would appreciate any help thanks.

cheers,

Jesus, stop driving it on boost. High revs + no oil pressure = boom, as said above the warning light almost always does work. It could just be low on oil and getting starved under decent Gs (accel, cornering) check the level and if its really low do a change, otherwise it could be the pump itself but definately check it out before you do any more damage. Also there can be problems with excessive oil getting to the head but I don't really know much about this topic. Probably be wise to check the oil and see if theres any bearing matter in it as well (silver sparkles)

Edited by Rolls

will the engine die straight away if your on boost with no oil pressure?

or is it more of a wearing of the engine until it dies?

i think ive been hitting boost with no oil pressure

hopefully its just a tired guage

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • You very likely need to get it on a dyno and tune it. My assumption is, you've got an RB25DET tune in it, which has a different manifold, different injectors, and different cams as a minimum. What O2 sensor are you running?   When you say it runs extremely rich from idle all the way to redline, is this just free revving it you see that?
    • I seem to the be only person that is using a Haltech 2500 on an NA motor, I've installed a Bosch DBW throttle body to the OEM intake manifold and am having problems maintaining AFR even with the wideband o2.  It will run extremely rich at idle and up to redline, but under load it will go extremely lean in the 20s and i'm essentially having to rev it over 4k and feather the clutch to get it up to speed.  I've read a few other threads of about the butterfly, it seems removing the vacuum to it is supposed to have it remain open, i've noticed no difference under 4k with the vacuum line to it plugged.  I'm hoping someone here has had luck using the NA manifold with Haltech, and if they happen to have a tune for it.  
    • I don't know any details, but I really wouldn't be surprised if they do it as a LHD only version, at least initially.
    • Thanks for the replies everyone. Definitely a coolant push. Oil catch can is empty and always has been. As the engine is out now I'll be having a good look over things. I do have some detonation on the piston tops from a trigger issue back about 5 years ago. I felt it and shut off then bought a new ecu and changed the trigger. Never been an issue since. It never hurt the power, its made almost 80hp more since that incident but I will pull the bearing caps to take a look. If the bearings are damaged I will do a bottom end refresh. Head is being re conditioned at the moment and the block will be cleaned and checked to ensure it's flat. I'll go with a kameari gasket and see how it ends up. The other thing I'm not super keen on is the cylinder colours. I suspect this is from the inlet manifold. The plan will be to put it back together, retune and then stick a plazmaman billet inlet on it and retune. I'm happy with the power, if it makes a little more, then great, but I would rather just make everything more efficient at this stage.
    • Maybe they'll look to do a bunch of presales to help inject some cash fast for their financial issues...
×
×
  • Create New...