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Low oil pressure after warm up

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rmcomprandy
airford1
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Low oil pressure after warm up Empty Low oil pressure after warm up

Post  airford1 March 21st 2020, 2:06 pm

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
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Post  rmcomprandy March 21st 2020, 3:17 pm

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.

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Post  airford1 March 21st 2020, 8:15 pm

Kind of my thought Thanks randy.
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Post  Frank Merkl March 21st 2020, 11:25 pm

pressures sound good to me ! send it!
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Post  Mark O'Neal March 22nd 2020, 3:13 pm

Might be cam bearing clearance, but certainly not something to worry about.

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Post  gt350hr March 23rd 2020, 2:04 pm

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.

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Post  airford1 March 23rd 2020, 3:44 pm

thanks guys
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Post  away April 10th 2020, 10:02 pm

Lifters in backwards. Tie bars to the inside!
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Post  airford1 April 13th 2020, 10:10 am

away wrote:Lifters in backwards.  Tie bars to the inside!
Funny guy, that has to be it.
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