Twin Cam Motors Twin Cam 1998 thru 2017

Primary oil after 24h

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Old 03-23-2022, 03:09 PM
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Default Primary oil after 24h

Hi,

I did some oil changes yesterday after installing a new pulley. After a test ride today I noticed that it was leaking oil from my shift lever and I suspect that I might have forgotten the gasket inside the primary. So I just drained the brand new oil from the primary and to my surprise it’s almost black?! This can’t be normal? What can be the cause of this in that case?





Thanks!
 
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Old 03-23-2022, 03:13 PM
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The chain and all the other parts inside, including the inside walls are coated in the old oil. It doesn't take much black oil to make clean oil turn black.
 
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Old 03-23-2022, 04:47 PM
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Alright, thanks for the quick reply!
 
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Old 03-23-2022, 05:27 PM
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Normal ride on
 
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Old 03-23-2022, 05:33 PM
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My oil in the primary has never looked like that with 50K.

Have you been running a non detergent gear oil like Formula + for non filtered gear boxes and switch to a high detergent motor oil?


I usually change all 3 ever 5k however. Been in primary twice and walls are filmed in black.

As long as you're getting 14.2 or so volts DC at around 2000 rpm, alternator is good and your good
 

Last edited by Jackie Paper; 03-23-2022 at 05:37 PM.
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Old 03-24-2022, 08:10 AM
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Originally Posted by steveknobz
... I noticed that it was leaking oil from my shift lever and I suspect that I might have forgotten the gasket inside the primary. ...

Check on #23



 
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Old 03-24-2022, 08:17 AM
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Your wife is gonna kill you when she finds out you used her baking pan like this!
 
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Old 03-24-2022, 07:26 PM
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If your oil keeps turning black, the clutch is slipping.. You may not be able to feel it as it only slips on the power stroke.
 
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Old 03-31-2022, 05:23 AM
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Clutch slipping is my thought also.
 
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