What is the oil pressure cold? What is it hot? Does it go higher if you give it throttle? Do you know what the oil pressure spec is for the bypass valve? Is it a dump to sump or dump to pump bypass valve? I know my DURAMAX will hit 75-80 when cold at an idle with 5W40 oil in it. Some small diesel engines will run some pretty high oil pressure in them at an idle when cold as well. The 5.9L CUMMINS in 98 when they went to the 24 valve engine went ot a dump to pump bypass valve, and these engines would hold 110 pounds of oil pressure cold, but only 40 or so hot. The previous gen of engine with a dump to sump bypass valve would peg out around 85-90 cold though, and run about 40 hot.
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2011 SUNDANCE B20CCR SKIFF, 2011 YAMAHA 90HP 4 STROKE, 2011 KARAVAN SINGLE AXLE ALUMINUM TRAILER, LOWRANCE ELITE-7 HDI, MINN KOTA RIPTIDE TROLLING MOTOR
2000CC HYDRA-SPORT 225+HP EVINRUDE SOLD 
AND THE PINK JEEP!!!! R.I.P.
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