Crankcase vent hole sludge
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Cruiser
Joined: Jan 2010
Posts: 135
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From: NW FL
Crankcase vent hole sludge
Decided to re-tighten my crankcase vent banjo bolts that lead to a drain hose setup. When I pulled the front cylinder bolt, there was a LOT of water/oil sludge in both the bolt and the head hole. The rear hole was fine, and I drained a little oil from the engine and no sludge in there.
What could have caused the sludge in that part of the engine and how concerned should I be?
What could have caused the sludge in that part of the engine and how concerned should I be?
Ultimate HDF Member
Joined: May 2006
Posts: 6,590
Likes: 444
From: Ohio
Was the bike warmed up first? You may have just had that from condensation. Go for a good ride and try again.
Club Member
Joined: Jun 2007
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From: Bedford UK
In addition to comments above it is also a by-product of additives in the oil you are using. You may find a change to a different brand will either make it worst, or improve it! I had problems many years ago with a popular brand of oil on one of my bikes and a change of brand solved it completely.
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Cruiser
Joined: Jan 2010
Posts: 135
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From: NW FL
Well, 650 miles complete over two days. Haven't pulled the vent bolt yet to look, but I did have a lot of oil leak out after the final 200 miles. They were pretty fast and a lot of wide open throttle during that last part. I think maybe the.vent bolt on my front cylinder is the culprit in the leak, but exactly how much oil should be coming out of there? I'll post pics in a few, but this seemed like a lot more oil than what I have heard described here. Looking around the bike, that bolt seems to be where most of the oil is pooling, but I'm going to go over it real well and see if it is coming out of anywhere else.
does anyone know off hand how much oil is coming out of the crank vent at around 3k to 4k for extended periods?
does anyone know off hand how much oil is coming out of the crank vent at around 3k to 4k for extended periods?
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Road Master
Joined: Oct 2011
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From: Carlsbad Springs Ontario
sludge
Decided to re-tighten my crankcase vent banjo bolts that lead to a drain hose setup. When I pulled the front cylinder bolt, there was a LOT of water/oil sludge in both the bolt and the head hole. The rear hole was fine, and I drained a little oil from the engine and no sludge in there.
What could have caused the sludge in that part of the engine and how concerned should I be?
What could have caused the sludge in that part of the engine and how concerned should I be?
They are usually a simple hose and gear clamps as there is very little pressure involved.? I have learned that the Harley motor has a very complicated oiling system but this being said , the crankcase breather hose should either be routed back to the intake or simply dump out to the ground .? Are you sure you are dealing with the correct hoses ?
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