sumping
Tourer
Joined: May 2010
Posts: 450
Likes: 2
You might want to look into this a bit more, but from what I understand, you do not want to remove that "plug" from the engine case. It is not meant to be a drain plug. It is a locator hole used when machining the cases. That is my understanding, and I have been wrong before.
HDF Community Team
Joined: Jun 2006
Posts: 12,774
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From: san antonio
How hot is hot?
The crank case drain plug can be removed without issues if done carefully. Checking for sumping should be done right after a ride while the cases are still hot. The problem usually occurs when tightening; it is a tapered pipe plug and can crack the case if over tightened. Once removed, a little anti sieze will make subsequent removals much easier.
7oz is a little more than I like to see come out of a crankcase; 4-6 is more like it but not enough to indicated sumping. But if the plug is not removed right after a ride and the bike is a softail, oil can drain from the oil tank into the crankcase.
The crank case drain plug can be removed without issues if done carefully. Checking for sumping should be done right after a ride while the cases are still hot. The problem usually occurs when tightening; it is a tapered pipe plug and can crack the case if over tightened. Once removed, a little anti sieze will make subsequent removals much easier.
7oz is a little more than I like to see come out of a crankcase; 4-6 is more like it but not enough to indicated sumping. But if the plug is not removed right after a ride and the bike is a softail, oil can drain from the oil tank into the crankcase.
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Road Warrior
Joined: Jan 2008
Posts: 1,446
Likes: 8
From: greenwood, mo
I checked it right after ride let it drain until it quit dripping got 7 oz my oil level never changes dont know how hot its running head temp gauge stays almost pegged when it i80 deg out no power loss may just need oil cooler with the 107 kit
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Joined: Dec 2007
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Sean,
Sumping occurs usually when the blind oil pump O ring, has been torn, misaligned, or otherwise installed incorrectly.
When this happens, the crankcase is overfilled with oil, from not being scavanged back to the oil tank, and the crank-postion sensor machined flywheel half(left side),slapping all that oil, does not allow the engine to spool off without a struggle.
Horsepower will nose dive by 25-30 hp loss.
That is usually 16 oz, or more, that'll create that, but once you crest 8 oz, signs of this start to creep in.
Scott
Sumping occurs usually when the blind oil pump O ring, has been torn, misaligned, or otherwise installed incorrectly.
When this happens, the crankcase is overfilled with oil, from not being scavanged back to the oil tank, and the crank-postion sensor machined flywheel half(left side),slapping all that oil, does not allow the engine to spool off without a struggle.
Horsepower will nose dive by 25-30 hp loss.
That is usually 16 oz, or more, that'll create that, but once you crest 8 oz, signs of this start to creep in.
Scott
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