crank case breather
Road Master
Joined: May 2007
Posts: 953
Likes: 8
From: Central Oregon
I suspect a leaking ball check valve in the pump. it permits the oil to drain into the crankcase when parked. Then upon start-up, you have a wet sumping condition that causes the oil to go overboard through the crankcase breather.
Harley manual states in trouble-shooting area:
"Excess Oil out of Crankcase Breather when starting Engine
1. Oil pump Check Ball Stuck open.
2. Poor seal between feed and return gears in pump."
I've run into this problem several times. Most often it is contamination in the oil system that causes the ball check valve to stick. Once, I had a bad gasket in the oil pump that was allowing leakage between the two sides.
Good luck.
Harley manual states in trouble-shooting area:
"Excess Oil out of Crankcase Breather when starting Engine
1. Oil pump Check Ball Stuck open.
2. Poor seal between feed and return gears in pump."
I've run into this problem several times. Most often it is contamination in the oil system that causes the ball check valve to stick. Once, I had a bad gasket in the oil pump that was allowing leakage between the two sides.
Good luck.
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