Oil Pressure

[HazzardMadWolf]

I am having an issue with oil pressure. It's a 460 and at start up it runs about 60lbs no matter the rpm. After reaching operating tempature it drops to about 25 lbs. at 2000 rpm and 12.5lbs at idle. I was thinking it was oil pump but i don't want to just start throwing parts at it. Any thought?

Thanks

 

[blacksnapon]

Remember, cold oil is "thick". When hot, the oil thins out, and the viscosity is different. High mileage engines will have more clearance in the bearings causing a loss of pressure when hot. Because the pressure is 60 cold would tell me that the pump is capable of developing that pressure. My guess is that you have a lot of miles on the motor.

 

[HazzardMadWolf]

I am running a 20w 50 oil with Lucas oil stabilizer. It has developed a tap in the top end that comes and goes. So you are thinking rebuild? I was hoping for something cheaper.