knuckle47
Advanced Contributor
"I realize as an engine ages w
"I realize as an engine ages with use, things happen. What might I begin to consider as reasons for the lower oil pressure. These are C454 1992. 720 hours ....starboard side is a rock steady 45 at any rpm.
Starting and initial pressure is 45 on the gauge (25 yrs old) but reasonably confirmed and has a new sender also. I know about using a mechanical test but I am still believing there is a drop whether it is exact or not ...it is still a drop.
After about 45 minutes at 2000-3000 she may drop to 25-30as it heats up. If running under 2000 after warm up, it may recover to 40. It appears the higher RPM run time 30 minutes or more will see the drop. I don't think it is the oil.. Straight 40W Pennzoil. What might be the 5 top causes considering the recovery in pressure again at lower RPM? Again...Thanks"
"I realize as an engine ages with use, things happen. What might I begin to consider as reasons for the lower oil pressure. These are C454 1992. 720 hours ....starboard side is a rock steady 45 at any rpm.
Starting and initial pressure is 45 on the gauge (25 yrs old) but reasonably confirmed and has a new sender also. I know about using a mechanical test but I am still believing there is a drop whether it is exact or not ...it is still a drop.
After about 45 minutes at 2000-3000 she may drop to 25-30as it heats up. If running under 2000 after warm up, it may recover to 40. It appears the higher RPM run time 30 minutes or more will see the drop. I don't think it is the oil.. Straight 40W Pennzoil. What might be the 5 top causes considering the recovery in pressure again at lower RPM? Again...Thanks"