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  #1  
Old 24th August 2021
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Gulf Coaster Gulf Coaster is offline
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Default Oil tank vent passing too much oil

Folks- I have built a 2003 Sportster into a hardtail chopper. I'm using an oil tank from TC Bros and it is just puking oil from the vent hose. It is a three quart tank with less than two quarts of oil in it, but when I ride, enough oil exits the vent tube that it is all over my tire, the frame, my back and so forth. When I park it, oil puddles below the vent tube. I would appreciate any advice on how to handle this situation. Thanks!!!
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Old 24th August 2021
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Need more info.
Is this the oil tank vent, tranny vent or the crankcase vent off the heads?
Some folks get these confused.
edit:
I'm asking to make sure we're on the same page.
The oil tank vent should not be puking anything you can see happening as it should be plumbed to the gearcase.


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Last edited by Hippysmack; 24th August 2021 at 05:49..
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  #3  
Old 24th August 2021
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That's a great drawing! The vent hose I mean is the one that runs from the oil tank and goes, in your drawing, to the gearcase. In the shop manual, it looks as though the oil tank vent hose just goes behind the case cover and ends. All other lines show a definite connection, but that one just looks like it is open. Consequently, mine isn't hooked to anything. So, somewhere on the side of the gearcase, behind the cover is a connection with out a line on it. I'll pull that off today and look for it. Many thanks for your help!
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Old 24th August 2021
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Quote:
Originally Posted by Gulf Coaster View Post
That's a great drawing! The vent hose I mean is the one that runs from the oil tank and goes, in your drawing, to the gearcase. In the shop manual, it looks as though the oil tank vent hose just goes behind the case cover and ends. All other lines show a definite connection, but that one just looks like it is open. Consequently, mine isn't hooked to anything. So, somewhere on the side of the gearcase, behind the cover is a connection with out a line on it. I'll pull that off today and look for it. Many thanks for your help!

There is a transmission vent hose not connected to anything that will puke oil if there is too much transmission fluid..



now you may find that you're oil is leaking into the trans case via the mainshaft seal (ask me how i know) and if that' the case you'll have more transmission oil *(Primary) Then you should.
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Old 24th August 2021
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jpeg of tank would help
that line if it is what i am thinking of needs to go to the case to equalize bag and engine. if it is just left open, it will puke oil.
another issue is that the standing tube has a hole in it allowing oil to enter at the bottom. that tube must not be covered with oil.
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Old 24th August 2021
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I'd love to provide a jpg, but I don't seem to be able to upload any images. Although the oil tank is horizontal, rather than the triangular stock tank, the line connections seem to be the same; a feed at the bottom, a return at the top, and a vent at the top. My issue now seems to be identified as the vent line is just hanging down. I just need to identify where it is supposed to go on the side of the engine, and that seems as though it will solve the problem. If anyone has a picture of that area on the bike, that would be a huge help. I'm about to go pull the pipes off and remove the cover to see if I can figure it out..
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On the right side in this pic, you can see a hose connected to a 90 degree fitting in the back of the cam cover.
That's where the vent from the oil tank connects.
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Old 24th August 2021
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Yep. That's it! Thank you, I really appreciate that. I just wish I had known where it was before I took the cam cover off. I could have gotten to it by just removing the sprocket cover, I think. So it goes. Learned something, today!
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Well,,,,, you didn't wait....

It's just another bonding moment anyway.
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Also you can check the Sportsterpedia for information.
More is being added daily on different subjects.
There are tons of things there already, those pics are linked from there.
http://www.sportsterpedia.com/doku.php
Click on Ironhead or Evolution from the main tech page and it'll take you to sub menus.
For instance:
Oil tank, Lines and Routing
http://www.sportsterpedia.com/doku.p...talk:evo:oil04
Engine Oil Routes
http://www.sportsterpedia.com/doku.p...talk:evo:oil02
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