Oil pressure bouncing around?
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Road Captain
Joined: May 2012
Posts: 603
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From: Ct
Oil pressure bouncing around?
My oil pressure is bouncing around. Used to be normal 32ish until hot. now it idles around 20-25 but will jump up to around 40-45 then drop back down with no load, it is not dropping to 0 and no lights are coming on. Just started lastweek. It's going in for cams and hydraulic cam plate and oil pump next week, but would like to ride this weekend. Any ideas?
Thanks
Thanks
Thread Starter
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Road Captain
Joined: May 2012
Posts: 603
Likes: 8
From: Ct
It never happen to my bike until last week. Trying to figure out what caused it to change?
Outstanding HDF Member
Joined: Jan 2014
Posts: 2,482
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From: Minnesota
My guess if either a faulty guage sending unit or a sticky bypass valve in the pump. I don't think the extra pressure will hurt anything but you could call your mechanic for advice.
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Road Warrior
Joined: Aug 2014
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From: Vancouver, WA
Why the need for such high oil pressure on these motors? They use roller bearings and not your typical main or rod bearings so high oil pressure isn't needed to fill bearing clearances and with too high of oil pressure, you'll fill the top of the motor too quickly. Just curious.
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Why the need for such high oil pressure on these motors? They use roller bearings and not your typical main or rod bearings so high oil pressure isn't needed to fill bearing clearances and with too high of oil pressure, you'll fill the top of the motor too quickly. Just curious.
You also want good pressure for the jets to spray oil on the bottom of the pistons for cooling.
I imagine it would take 900 pounds (made up) of pressure to fill the top of the motor considering only ounces only make it up there under normal operation. Literally dripping out.
Road Warrior
Joined: Aug 2014
Posts: 1,937
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From: Vancouver, WA
Rods on piston side, lifters, rocker arms, cam to cam plate, crank on cam plate, etc are not roller bearings.
You also want good pressure for the jets to spray oil on the bottom of the pistons for cooling.
I imagine it would take 900 pounds (made up) of pressure to fill the top of the motor considering only ounces only make it up there under normal operation. Literally dripping out.
You also want good pressure for the jets to spray oil on the bottom of the pistons for cooling.
I imagine it would take 900 pounds (made up) of pressure to fill the top of the motor considering only ounces only make it up there under normal operation. Literally dripping out.