Pressure in crankcase.
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Stage I
Joined: Aug 2006
Posts: 1
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From: Norway
Pressure in crankcase.
Hallo there,
A Question that has been asked a lot is problem with oil coming out of the oil tube behind the engine.
I wonder how big the normal pressure in the crankcase is?
I tried to adjust the timing with a Stobe-lamp , but the motor spit a lot of oil out the inspection hole.
What is the normal pressure in there??????
Regards
Pinex (N)
A Question that has been asked a lot is problem with oil coming out of the oil tube behind the engine.
I wonder how big the normal pressure in the crankcase is?
I tried to adjust the timing with a Stobe-lamp , but the motor spit a lot of oil out the inspection hole.
What is the normal pressure in there??????
Regards
Pinex (N)
Outstanding HDF Member
Joined: Jul 2006
Posts: 2,303
Likes: 4
From:
RE: Pressure in crankcase.
Shovels will somewhat spit oil at breather hose,More so if stroked.If this happens only after sitting then check ball at pump is letting oil from tank sneak by and once started that oil has to go somewhere.S&S makes a new style breather for modified shovels-Open primarys,chain oiler disconnected-which works better than stock breather.About 90 bucks,reed style breather.
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Joined: May 2006
Posts: 50
Likes: 0
From: Delaware
RE: Pressure in crankcase.
Sumping is what I believe it's called.
I had the same problem with the same explanation, some kinda ball check valve in the oil pump allowing oil to seep into the crankcase. But my problem just went away. I'm a fair weather rider so I'm always careful to put something under the breather for the first start of the season, but this year I had nothin.
And if the crankcase works the way I understand it to, there really is no "pressure", it just needs to breathe to compensate for the pistons going up and down inside the cylinders.
I had the same problem with the same explanation, some kinda ball check valve in the oil pump allowing oil to seep into the crankcase. But my problem just went away. I'm a fair weather rider so I'm always careful to put something under the breather for the first start of the season, but this year I had nothin.
And if the crankcase works the way I understand it to, there really is no "pressure", it just needs to breathe to compensate for the pistons going up and down inside the cylinders.
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