Lebro Posted May 15, 2021 Report Share Posted May 15, 2021 May be worth trying a different gauge (you could attach it where your rocker feed went) that tickover figure is just too high to believe. If it were just the pressure relief valve setting, then at higher revs the gauge would be off the scale. Bob. Quote Link to post Share on other sites
Willie Posted May 15, 2021 Author Report Share Posted May 15, 2021 I'll be struggling with that, Bob. The gauge hasn't just started giving high readings, it has always been on the high side. Perhaps the next step [after checking compression on Monday] will be to see if it happens again, given that the difference now is the removed top end extra lubrication. Willie Quote Link to post Share on other sites
Willie Posted May 17, 2021 Author Report Share Posted May 17, 2021 Update: tests gave following results in psi {cylinders 1-4) 156, 152, 152, 148 Willie Quote Link to post Share on other sites
Lebro Posted May 17, 2021 Report Share Posted May 17, 2021 Looks ok, all within 5.5%. Bob. Quote Link to post Share on other sites
Ralph Whitaker Posted May 20, 2021 Report Share Posted May 20, 2021 On 5/15/2021 at 12:02 PM, Willie said: Update....oil feed to rockers now removed. Engine from start up hit 60 psi at 850 rpm with choke. When temperature was in the 70 degree zone, 60 psi at tickover, rose to 70 psi at 2000 rpm! That's the target! See shot taken earlier. Do I need to adjust anything? As a matter of interest, does anyone know the AF spanner size for the PRV adjuster locknut? Looks to be just under 1" AF. Willie My 3a shows pressures similar to these on start up and running using Millers Golden Film 20/50. Can leave it running for ages on tickover untill the electric fan kicks in (so engine coolant up to temp), and still shows 70 on oil gauge. But take it for a good run to get the oil really hot and then it will drop to 30/40 at tick over. Point I am making is the oil may not be up to temp even if the coolant is. Ralph Quote Link to post Share on other sites
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