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M8 cooler and filter flow

Started by JSD, February 09, 2022, 08:21:34 PM

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JSD

Got told the oil flows via cooler then the filter ifso on cold starts and cold weather the 5 micron oil filter may be in bypass as oil is thicker. 

Ohio HD

If your talking about the factory oil cooled bikes. No the oil doesn't go from the oil cooler to the oil filter. It goes from the oil cooler to the cylinder heads.

Deye76

My experience when a filter is bypassed even for a short period the oil turns very dark, quickly.
East Tenn.<br /> 2020 Lowrider S Touring, 2014 CVO RK,  1992 FXRP

hrdtail78

From pump to filter then throughout engine.  Couple of thing to keep in mind.  We have multi viscosity oil and the pressure of bypass is pressure deferential seen by bypass spring and not indicated oil pressure.
Semper Fi

JSD

Thanks for clearing up the flow path much appreciated 

Ohio HD


JSD


Dan89flstc

Oil coming out of the pump takes 2 paths (oil cooled engine):

To the oil cooler:
Oil goes through the oil cooler, then on to the cooling manifold and then the cooling passageways in the cylinder heads, then back to the oil pan.

To the oil filter:
Oil goes through the filter, then comes back into the cam support plate where it is routed to the lifters, crank, piston oil jets etc.

 
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A&P Mechanic

JSD


Admiral Akbar

Quote from: Deye76 on February 11, 2022, 06:35:25 AMMy experience when a filter is bypassed even for a short period the oil turns very dark, quickly.

How do you tell that it's the bypass that is causing the black oil?

Dan89flstc

Quote from: Deye76 on February 11, 2022, 06:35:25 AMMy experience when a filter is bypassed even for a short period the oil turns very dark, quickly.
How do you know what caused the oil to turn black, and how did you determine how long the filters were in bypass mode?

I`m not buyin it.
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A&P Mechanic

Deye76

May 11, 2022, 04:20:43 PM #11 Last Edit: May 11, 2022, 05:27:05 PM by Deye76
Dan, it was a Evo on a friends bike, and once the oil lines were routed correctly, the oil stayed clean. Thought the M8 would be the same, not selling anything.
East Tenn.<br /> 2020 Lowrider S Touring, 2014 CVO RK,  1992 FXRP