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Took it for a drive ,outside temp around 65f. Immediate pressure on starttup, climbs to 42psi within 3 seconds. Climbed a 11 % mountain for about 1 mile, went down and up again. Oil pressure at idle 14psi climbs to 30psi at 1500rpm. Does not go above 40 psi at any rpm once hot. Oil pressure...

Took it for a drive ,outside temp around 65f. Immediate pressure on starttup, climbs to 42psi within 3 seconds. Climbed a 11 % mountain for about 1 mile, went down and up again. Oil pressure at idle 14psi climbs to 30psi at 1500rpm. Does not go above 40 psi at any rpm once hot. Oil pressure...

Kris, I think one should start with a oil pressure gauge to know what is happening. In my case the oil pressure was low and as far as I can tell because of an old oil pressure relief spring. After reading the longest oil pressure thread my recollection is that the cold oil cannot flow fast...

Cold start this morning.. oil pressure gauge starts to move after one second and on 44 psi after 3 seconds . Now it is much warmer, like 62f so this data point does not mean al that much.. I can hear the lifters tick slightly the first second and then become quiet. Not sure if I ever heard...

Cold start this morning.. oil pressure gauge starts to move after one second and on 44 psi after 3 seconds . Now it is much warmer, like 62f so this data point does not mean al that much. Johan

This is a copy of the posts on the oil pressure thread... Well some progress. Made an adjustable shim. Took the circlip and oil relief spring out. Used a threaded rod in a frame home that is nice inline with the oil pressure relief cap to push the whole assembly back in Oil pressure cold low...

As I understand it the oil relief valve is a bypass valve, it dumps high pressure oil back to the inlet so choking it increases pressure and reduces the oil going back to the pump inlet. Thus higher flow thru the bearings. The flow total flow thru the pump might be less because of higher...

Sorry Greg, little late with uploading the pics. The Lowe's part is the exact fit of the bore . It is caught behind the circlip. The 1/4" bolt pushes at the original oil plug and can move it more inwards increasing the spring tension and thus the oil pressure bypass.... The 3/8 threaded rod is...

Well some progress. Made an adjustable shim. Took the circlip and oil relief spring out. Used a threaded rod in a frame home that is nice inline with the oil pressure relief cap to push the whole assembly back in Oil pressure cold low middle.40 psi. Adjusted my shim about a turn..44 psi.

Hi Greg, the only thing that changed was that the second time the wix filter and oil system was full. So the second time with the new wix compares the time / pressure with the old filter. Not sure the 3psi is in the error readout range. The 2 psi drop while revving up is strange. With more...

Another cold start test with the wix low bypass filter. No modification to relief valve yet. Pressure starts to builds up in 1 second and passes 10psi in two seconds. Maxes out at 37 psi at idle cold. Next will be adding the relief valve pressure adjuster to it. Johan

Another cold start test with the wix low bypass filter. No modification to relief valve yet. Pressure starts to builds up in 1 second and passes 10psi in two seconds. Maxes out at 37 psi at idle cold. Next will be adding the relief valve pressure adjuster to it. Johan

Got a new large wix filter and pre filled with rotella 15w40. Cranked without fuses for fuel.and injection for 20 sec, no oil pressure. Then started and ran for 15 sec before oil pressure came up. 3 psi higher then with old filter.. 35 psi instead of 32. When revving up oil pressure drops 2 psi...

Prefilled with rotella 15w40 and installed the larger wix aaaaa filter. Cranked 20 sec with fuses for injection and fuel pump out. Then started and it took another 20 sec before oil pressure was there. The fuel PO pressure went up 2-3 psi at idle cold... From 32 to 35. Same behavior with revving...

On a" oil pressure d1" thread in the tech section Lrdone posted this pic. That explained a lot. So after the relief valve oil still has to go thru the cooler and filter. If the oil is thick that will take some time. Worsened if the oil filter has a bypass valve that has a high setting. I got a...

Oh, and thanks Boxster, that is a better pic but still not relief valve.. Yes I read that thread, good info is hard to come buy. I will try the new filter with the original spring setup and report the difference going from 16 to 8psi filter bypass. Johan

Thanks guys, lrdone, perfect that explains a lot. This morning another cold start. Oil pressure stays 0 on gauge and starts building up after 5 seconds slowly to 28 psi. Revving engine lowers pressure with 1 to 2 psi. I increased pressure on the relief valve and pressure increased to 50 psi at...

Hi Greg, the gear pump is positive displacement, besides internal leaks the volume is linear with rpm. Yes the pressure is high going into the restriction and then low on the other side. If indeed the relief valve is after the oil cooler / filter then it does not surprise me that the gerotor...

Hi discoclay, I am making my gauges to the left of the existing cluster. Like to keep the dash flat for other junk floating around haha. Yeah,I posted the oil pressure on the technical area but not getting anywhere fast. The manual is lousy, and seeing the problems with unresolved low oil...

Ok , thank you both, boxter, that would make sense but I cannot see it in the picture, then in the casting picture it looks like there are oil galleries that connect directly to the output of the pump. So that would indicate the opposite. Lrdone, it makes a big difference.. if you relief the...