Jump to content
SAU Community

Recommended Posts

hi,

for the past 6 weeks or so, i've had unusually high oil pressure (8+ on the gauge when cold, 4-5 when idle, back up just under 8 when stomping it). i'm also going through oil reeeaal quick. what i'm thinking is that something is causing excessive oil pressure, and the relief valve is bleeding it off (and subsequently losing oil) as a result.

i was using castrol magnatec and then formula R 10W60. Formula R 5W40 is my next oil I plan to use, but not if I've got pressure/bleed problems....

does the oil pressure relief valve bleed oil off at high pressures? and what can cause excessively high oil pressures?

also, where IS the relief valve and where does it bleed to?

Link to comment
https://www.sau.com.au/forums/topic/27933-high-oil-pressure-losing-oil/
Share on other sites

Guest RedLineGTR

Changing to Different oils isnt to good. I used Castrol 10-60w and my oil pressure was way high..too high for my me so i changed it asap. I have used different oils and had different results with each. A good overall synthetic oil is Shell Helix Ultra 5-40w it is priced for what it is as compaired to Major Brands like Mobile 1 etc. I am currently using Shell Helix Ultra and my "general" engine temps seem to be at a good temp. I am going to be switching to Motul 8100 5w-40w at my next oil change i know from facts/specs that it is the best synthetic quality in that catagory/quality and at the price of $55 bucks its not to steep either. With both of these oils i have had "handbook" spec oil pressures which i am happy with.

In general the only two oils that i would recommend are those 2 mentioned that dont go over $60 bucks like Mobil 1 which is overpriced for what it is.

The relief vavle is located near the oil pump. NOt sure exactly in the RB (I do in teh SR). I dont think changing oils will help. Maybe you've got a munged oil filter. Change that first... and dont put the revs too high so u dont strain the pump and stuff.

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

    • Yup. You can get creative and make a sort of "bracket" with cable ties. Put 2 around the sender with a third passing underneath them strapped down against the sender. Then that third one is able to be passed through some hole at right angles to the orientation of the sender. Or some variation on the theme. Yes.... ummm, with caveats? I mean, the sender is BSP and you would likely have AN stuff on the hose, so yes, there would be the adapter you mention. But the block end will either be 1/8 NPT if that thread is still OK in there, or you can drill and tap it out to 1/4 BSP or NPT and use appropriate adapter there. As it stands, your mention of 1/8 BSPT male seems... wrong for the 1/8 NPT female it has to go into. The hose will be better, because even with the bush, the mass of the sender will be "hanging" off a hard threaded connection and will add some stress/strain to that. It might fail in the future. The hose eliminates almost all such risk - but adds in several more threaded connections to leak from! It really should be tapered, but it looks very long in that photo with no taper visible. If you have it in hand you should be able to see if it tapered or not. There technically is no possibility of a mechanical seal with a parallel male in a parallel female, so it is hard to believe that it is parallel male, but weirder things have happened. Maybe it's meant to seat on some surface when screwed in on the original installation? Anyway, at that thread size, parallel in parallel, with tape and goop, will seal just fine.
    • How do you propose I cable tie this: To something securely? Is it really just a case of finding a couple of holes and ziptying it there so it never goes flying or starts dangling around, more or less? Then run a 1/8 BSP Female to [hose adapter of choice?/AN?] and then the opposing fitting at the bush-into-oil-block end? being the hose-into-realistically likely a 1/8 BSPT male) Is this going to provide any real benefit over using a stainless/steel 1/4 to 1/8 BSPT reducing bush? I am making the assumption the OEM sender is BSPT not BSPP/BSP
    • I fashioned a ramp out of a couple of pieces of 140x35 lumber, to get the bumper up slightly, and then one of these is what I use
    • I wouldn't worry about dissimilar metal corrosion, should you just buy/make a steel replacement. There will be thread tape and sealant compound between the metals. The few little spots where they touch each other will be deep inside the joint, unable to get wet. And the alloy block is much much larger than a small steel fitting, so there is plenty of "sacrificial" capacity there. Any bush you put in there will be dissimilar anyway. Either steel or brass. Maybe stainless. All of them are different to the other parts in the chain. But what I said above still applies.
    • You are all good then, I didn't realise the port was in a part you can (have!) remove. Just pull the broken part out, clean it and the threads should be fine. Yes, the whole point about remote mounting is it takes almost all of the vibration out via the flexible hose. You just need a convenient chassis point and a cable tie or 3.
×
×
  • Create New...