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Oil pressure

Started by plumberglen, May 12, 2022, 05:34:14 PM

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plumberglen

How much oil pressure  at idle ?
hey

kd

May 12, 2022, 06:36:13 PM #1 Last Edit: May 12, 2022, 07:21:23 PM by kd
Quote from: plumberglen on May 12, 2022, 05:34:14 PMHow much oil pressure  at idle ?

Can you help with model, any mods, at what engine and ambient temperature, oil weight, and rpm?
KD

plumberglen

2012. 103. 66 degrees Fahrenheit. Fresh rebuild
hey

kd

Hot about 20# should be average at 1050 rpm.  Warm, 30 - 35# and Cold could spike to 40 - 50# at start-up.  These would be average and dependent on oil weight (which you didn't say) and pump alignment after rebuild / pump wear.  A little less IMO is not a concern.   Running at highway rpm 30+ hot is average.  Again, depending on the oil weight and actual engine temp.
KD

plumberglen

Ok ,start bike cold ,pressure jumps up to 36 -38 psi ,let it warm up ,take for a scoot pressure holds about 32 for a while, then gradually starts to dropdown to 15 or less, then very low on gauge. Engine was just rebuilt, new oil pump, lifters
What do yo think, Sending unit ? gauge? other possibilities?? 
hey

Coyote

Really depends on which oil pump. Stock one drops really low at idle. But if the oil light isn't coming on, I'd not worry about it.

plumberglen

 :up: Thats what im thinking, Thanks
hey

JW113

Mine do the same thing. In fact, on a hot summer day after a ride and the oil is really hot, the oil light will flash at idle, but goes out with just a wee bit of throttle. Perfectly normal.

-JW
2004 FLHRS   1977 FLH Shovelhead  1992 FLSTC
1945 Indian Chief   1978 XL Bobber

FXDBI

Did you check the piston oilers when you rebuilt it?    Bob