Oil pump shim

[redbeard]

I'm still not convinced that the new super duper up graded oil bypass valve is doing it's job.

When I replaced the bypass valve on my 2250 with the new "super cure all bypass valve" the o-rings were very loose in the bore. I called and talked to numerous techs and they all told me that that was they way they fit.

Seems to me that if the oil slides past the valve, how can it regulate it?

I'm running a bypass filter, and doing oil changes at 14,000 miles with the mandated motor.

Oil pressure has been an issue since the day I got it and fluctuates greatly between fresh and at changing.

43psi with 8 dimes in pump and fresh oil, and starts creeping down to 35 at oil change running down the road at 1400rpm.

New filter and oil pops right back.

Changed rod bearings at time of pump mod just because wanted cheap peace of mind, 225,000 miles on engine and they looked pretty good. Engine sounds good and tight