Skitzvk Posted July 17, 2018 Share Posted July 17, 2018 hey guys just looking for some ideas here. started my car the other morning. and had no oil pressure so shut it off straight away. tried turning car over with no fuel or cas. and nothing so replaced pump with a rb25 pump new also added a shim to the pump like i did with the 30 pump. and started car and had 100psi on cold start. once car was at temp it was 25 30 psi. but strange on light load 3000rpm oil pressure jumps to 100 psi. engine is a rb26/30 running hpr15 oil . did try thinner grade and same issue. using electric autometer oil pressure gauge does this sound like a dodgy relief vavle spring Link to comment https://www.sau.com.au/forums/topic/474523-high-oil-pressure/ Share on other sites More sharing options...
Looney_Head Posted July 17, 2018 Share Posted July 17, 2018 I too have the same problem with my rb25det pump on my rb25/30. On the dyno I saw 120psi through the run. I am about to pull my pump off to check the relief valve. Let me know if you find a cause for your issue Link to comment https://www.sau.com.au/forums/topic/474523-high-oil-pressure/#findComment-7881196 Share on other sites More sharing options...
Skitzvk Posted July 17, 2018 Author Share Posted July 17, 2018 yer that be awesome man. did you shim the pump Link to comment https://www.sau.com.au/forums/topic/474523-high-oil-pressure/#findComment-7881214 Share on other sites More sharing options...
Looney_Head Posted July 17, 2018 Share Posted July 17, 2018 Nah mine is just a stock brand new rb25det pump Link to comment https://www.sau.com.au/forums/topic/474523-high-oil-pressure/#findComment-7881231 Share on other sites More sharing options...
Skitzvk Posted July 17, 2018 Author Share Posted July 17, 2018 yer strange. exactly what i have. Link to comment https://www.sau.com.au/forums/topic/474523-high-oil-pressure/#findComment-7881233 Share on other sites More sharing options...
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