Sportster drain plug
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Stage IV
Joined: Jun 2011
Posts: 4
Likes: 0
From: Australia
Sportster drain plug
Hey guys, I am brand new to the forum. I have an 88 Sporty and the manual shows the engine oil drain at the bottom of the oil tank. The oil tank is higher than the crank, so how do you drain all of the oil out of the motor? The manual says nothing about a bottom of the crank oil drain. Can anybody help?
Cruiser
Joined: Mar 2009
Posts: 167
Likes: 3
From: Cornelius OR
If you read the manual it says to run and warm the motor before changing oil.
This will return all but the smallest amount to the tank.
Don't worry about that little bit of oil.
Oil temperature is more important, put a cooler on it. And don't use environmentally friendly (low emissions) oil in it.
This will return all but the smallest amount to the tank.
Don't worry about that little bit of oil.
Oil temperature is more important, put a cooler on it. And don't use environmentally friendly (low emissions) oil in it.
Pure fight/dispute napalm.....
Last edited by cvaria; Apr 4, 2016 at 08:38 AM.
Thread Starter
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Stage IV
Joined: Jun 2011
Posts: 4
Likes: 0
From: Australia
Thanks guys, but i still have a problem. This is my project bike and it isn't running at the moment. My first step was to recon the carburettor, then check for spark and other electricals, now i want to drain all the old oil and give it a fresh drink before i try to start it. I have taken the oil filter hose off the bottom of the oil pump, but that does not look like the lowest point of the crankcase. What do you think, would that be as much oil as it is going to give up?
Seasoned HDF Member
Joined: Feb 2007
Posts: 5,067
Likes: 394
From: Edmonton Alberta Canada
http://roguechopper.com/
These guys have a total change system but I think your overthinking this, the small amount of oil left after a traditional change is a non-issue.
These guys have a total change system but I think your overthinking this, the small amount of oil left after a traditional change is a non-issue.
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Extreme HDF Member
Joined: Dec 2007
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From: Illinois
OP maybe you don't understand "dry sump" . Unlike a car motor the H-D motor pumps the oil from the bottom of the engine to the oil tank under the seat. Why? There is not enough room in the bottom of the crankcase for all the oil.
However, if the check valve is stuck much of it may have drained back. That is called "sumping". It might be best to jump ahead of yourself a few steps and run the engine to warm up the oil and insure all is in the oil tank before changing. The low point in the Sportster for oil is the bottom of the oil tank and not the engine case.
However, if the check valve is stuck much of it may have drained back. That is called "sumping". It might be best to jump ahead of yourself a few steps and run the engine to warm up the oil and insure all is in the oil tank before changing. The low point in the Sportster for oil is the bottom of the oil tank and not the engine case.
Last edited by lh4x4; Apr 4, 2016 at 07:14 PM.
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Stage IV
Joined: Jun 2011
Posts: 4
Likes: 0
From: Australia
Sumping
Hey lh4x4,
I think you may be onto something when you mentioned that the oil could drain back into the motor. My other problem is that all of the oil in the tank drained into the motor and leaked out in places. When i turned the motor over (without spark) it squirted out of the carbie breather. This is the other reason why i do not want to try to start the motor yet.
Where is the "check valve" that you mentioned?
Ric
I think you may be onto something when you mentioned that the oil could drain back into the motor. My other problem is that all of the oil in the tank drained into the motor and leaked out in places. When i turned the motor over (without spark) it squirted out of the carbie breather. This is the other reason why i do not want to try to start the motor yet.
Where is the "check valve" that you mentioned?
Ric
Last edited by Ric Jelfs; Apr 5, 2016 at 08:14 PM.
