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My cm2250 has 519047 miles/10693 hrs on it.
Would it be advisable to shim the oil pump?
Current oil psi at operating temp is 35.
40 when cold at idle.

35 psi at operating temperature at idle is very good pressure.

(07-11-2016 )Wiseman Wrote: [ -> ]35 psi at operating temperature at idle is very good pressure.

Sorry, the 35 psi is while I'm going down the road.

Then you need to bump it up . Read Hammerhead's post and few other's related .