Quick Sumping/Migration question
Thread Starter
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Tourer
Joined: Aug 2012
Posts: 330
Likes: 16
From: Colorado
Quick Sumping/Migration question
Just wanted to ask for clarification on the Sumping and Migration issues.
From what I am seeing, these are 2 separate issues correct?
1. Transmission oil migration into Primary
2. Some sort of oil pump/oil flow issue where the engine oil is getting pumped into the Primary
Is this correct?
From what I am seeing, these are 2 separate issues correct?
1. Transmission oil migration into Primary
2. Some sort of oil pump/oil flow issue where the engine oil is getting pumped into the Primary
Is this correct?
Seasoned HDF Member
Joined: Apr 2015
Posts: 6,863
Likes: 3,727
From: St. Charles, MO
Just wanted to ask for clarification on the Sumping and Migration issues.
From what I am seeing, these are 2 separate issues correct?
1. Transmission oil migration into Primary
2. Some sort of oil pump/oil flow issue where the engine oil is getting pumped into the Primary
Is this correct?
From what I am seeing, these are 2 separate issues correct?
1. Transmission oil migration into Primary
2. Some sort of oil pump/oil flow issue where the engine oil is getting pumped into the Primary
Is this correct?
Grand HDF Member
Joined: Jun 2010
Posts: 4,584
Likes: 918
From: coast to coast
Sumping is where residual oil in the case is overwhelming the sump/scavenger/pump system and filling the crankcase thereby interacting with the crank/flywheel/counterbalancer causing heat, foaming, and eventual catastrophic failure.
Last edited by Thingfish; Dec 6, 2017 at 02:50 PM.
Thread Starter
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Tourer
Joined: Aug 2012
Posts: 330
Likes: 16
From: Colorado
I just pulled 16oz out of my primary and I am pretty sure it did NOT come from the transmission. I have been keeping tabs on the transmission level, I did add about 3 oz over 4k miles.
Trying to figure out how an extra 16oz made it into the Primary. Would that be the oil pump issue then?
Trying to figure out how an extra 16oz made it into the Primary. Would that be the oil pump issue then?
Grand HDF Member
Joined: Nov 2013
Posts: 3,807
Likes: 1,488
From: SW Washington State
I just pulled 16oz out of my primary and I am pretty sure it did NOT come from the transmission. I have been keeping tabs on the transmission level, I did add about 3 oz over 4k miles.
Trying to figure out how an extra 16oz made it into the Primary. Would that be the oil pump issue then?
Trying to figure out how an extra 16oz made it into the Primary. Would that be the oil pump issue then?
Grand HDF Member
Joined: Jun 2007
Posts: 4,598
Likes: 421
From: Lansing mi
I just pulled 16oz out of my primary and I am pretty sure it did NOT come from the transmission. I have been keeping tabs on the transmission level, I did add about 3 oz over 4k miles.
Trying to figure out how an extra 16oz made it into the Primary. Would that be the oil pump issue then?
Trying to figure out how an extra 16oz made it into the Primary. Would that be the oil pump issue then?
Thread Starter
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Tourer
Joined: Aug 2012
Posts: 330
Likes: 16
From: Colorado
So crank seal is the possible culprit? According to a TSB I had read, it cited oil pump.
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Seasoned HDF Member
Joined: May 2012
Posts: 32,934
Likes: 36,027
From: Carlsbad, CA
If it came from the motor, you should see 16 oz. low on the dip stick. Same as if it came from the tranny.
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Grand HDF Member
Joined: Nov 2013
Posts: 3,807
Likes: 1,488
From: SW Washington State
Yes, if eng oil is in the primary, the crank seal is most likely the cause. Some have been found to be torn during installation at the factory.
Thread Starter
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Tourer
Joined: Aug 2012
Posts: 330
Likes: 16
From: Colorado
Per their conversation with HD corp, they had originally thought there was a crank seal issue but they said that had fixed absolutely nothing and have since stopped that recommendation. Now researching other possible causes.