Low oil pressure after warm up
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rmcomprandy
airford1
6 posters
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Low oil pressure after warm up
I just had my 460 freshened up. New rings and bearing micro polish the crank. Well its 65 psi at cold start and stays that high till after I make a pass then at idle the pressure drops to 25psi. Using 20/50 Valvoline zr1. Before the freshening it wouldn't drop below 40 psi. Should I be concerned? It goes back up to 60psi as soon as I bring the rpm up above 900
airford1- Posts : 192
Join date : 2009-10-15
Re: Low oil pressure after warm up
airford1 wrote:I just had my 460 freshened up. New rings and bearing micro polish the crank. Well its 65 psi at cold start and stays that high till after I make a pass then at idle the pressure drops to 25psi. Using 20/50 Valvoline zr1. Before the freshening it wouldn't drop below 40 psi. Should I be concerned? It goes back up to 60psi as soon as I bring the rpm up above 900
The engine clearances or oil pump probably have something different than before the "freshen-up".
I don't see any problem with 25 pounds oil pressure at idle.
Re: Low oil pressure after warm up
Kind of my thought Thanks randy.
airford1- Posts : 192
Join date : 2009-10-15
Re: Low oil pressure after warm up
pressures sound good to me ! send it!
Frank
Frank
Frank Merkl- Posts : 1524
Join date : 2008-12-17
Age : 68
Location : Brooks ,Alberta ,Canada
Re: Low oil pressure after warm up
Might be cam bearing clearance, but certainly not something to worry about.
Mark O'Neal- Posts : 286
Join date : 2009-08-12
Re: Low oil pressure after warm up
As long as the pressure goes up at RPM you are good . No "reason" to have 40 or more at idle. 25 is fine as others have already said.
gt350hr- Posts : 662
Join date : 2014-08-20
Location : Anaheim , CA
Re: Low oil pressure after warm up
Lifters in backwards. Tie bars to the inside!
away- Posts : 266
Join date : 2009-10-08
Age : 46
Location : Harrodsburg KY
Re: Low oil pressure after warm up
Funny guy, that has to be it.away wrote:Lifters in backwards. Tie bars to the inside!
airford1- Posts : 192
Join date : 2009-10-15
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