October 17, 2019, 08:35:41 PM
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Author Topic: Oil light comes on after 100 miles  (Read 5260 times)

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July 06, 2019, 08:35:25 AM
Reply #30
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NoSuperSlabs

Supporting Member
So I would assume that the oil pressure sensor was changed because you measured proper pressure on a master gauge? That proves that when you measured the pressure it was in spec at that moment but might be dropping out of spec after 100 miles. That fact that it is dropping out of spec after 100 miles might be pointing to a bad oil pump that drops the pressure after the period of time that it takes to run 100 miles.
Two Lane Highway
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July 06, 2019, 08:51:54 AM
Reply #31
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Brent526


So I would assume that the oil pressure sensor was changed because you measured proper pressure on a master gauge? That proves that when you measured the pressure it was in spec at that moment but might be dropping out of spec after 100 miles. That fact that it is dropping out of spec after 100 miles might be pointing to a bad oil pump that drops the pressure after the period of time that it takes to run 100 miles.
Any suggestions to pin point the oil pump as source of problem. Heading to idaho in a couple weeks trying to avoid failure bout in the midst of no where



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July 06, 2019, 09:23:36 AM
Reply #32
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HDBitchin

Administrator
Take a peak at the below linked thread...

Lubrication (Oiling) Issues

In general you might consider these as potential causes...

Low Oil Pressure
1. Oil reservoir underfilled.
2. Faulty low oil pressure switch.
3. Oil pump O-ring damaged or missing.
4. Bypass valve stuck in open position.
5. Ball missing or leaking in cam support plate.
6. Worn oil pump gerotor(s).
7. Oil diluted with gasoline.

What is your idle RPMs?

October 12, 2019, 01:50:04 PM
Reply #33
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AbueloBill

Supporting Member
Any suggestions to pin point the oil pump as source of problem. Heading to idaho in a couple weeks trying to avoid failure bout in the midst of no where



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Brent, did you ever get the oil issue resolved, and how did the Idaho trip turn out?  Did you ride this bike?
"No man ever steps in the same river twice,
For it is not the same river and he is not the same man."

--Heraclitus


October 12, 2019, 08:42:52 PM
Reply #34
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Brent526


Brent, did you ever get the oil issue resolved, and how did the Idaho trip turn out?  Did you ride this bike?
No still have the issue. Dealership is unable to locate source of issue. The pressure switch has been replaced. Mechanic said there is nothing wrong with the engine. Next oil change perhaps a straight weight might solve issue.



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October 14, 2019, 08:45:09 PM
Reply #35
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AbueloBill

Supporting Member
Brent, when the dealer said the engine was OK did they check the oil pressure?  Harley has a diagnostic kit for this, 96921-52D plus an adaptor, the dealer should have.  I don't know but suspect it is rather expensive for an individual to purchase if you wanted to do your own checking but there are after market kits on Amazon that seem reasonable.

What about a T- adapter where you could install your own oil pressure gauge?  There seems enough room between the engine and frame for an adapter and the line to bring a gauge out to where you could monitor the pressure.  Wouldn't take much, something from AutoZone should suffice.  By keeping the warning light in the circuit you could check the pressure when the light came on.

Finally, have you inspected the wire from the sensor for wear?  On my Sporty the wire runs against a frame tube before disappearing into a sheath; if yours is the same the insulation may have worn off and the wire is making an intermittent contact.  Would be an easy fix with a piece of tape.
"No man ever steps in the same river twice,
For it is not the same river and he is not the same man."

--Heraclitus

October 14, 2019, 09:14:15 PM
Reply #36
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Brent526


Thank you for the suggestions. I will find a way to moniter the pressure


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October 14, 2019, 09:28:32 PM
Reply #37
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bc45

Global Moderator
No still have the issue. Dealership is unable to locate source of issue. The pressure switch has been replaced. Mechanic said there is nothing wrong with the engine. Next oil change perhaps a straight weight might solve issue.



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@Brent526  I would do as AbueloBill suggested and install a gauge and see what the actual oil pressure is when the light comes on by using a T adapter. I am not sure what a straight weight 30w oil would be any differant the 10W-30 oil as 10w stands for winter so it is 10 weight cold and 30 weight hot so when hot it would be the same as your straight 30 weight hot.
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