Leak from Chaincase Drain Plug
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Leak from Chaincase Drain Plug
The last time I had my 07 Street Bob serviced at the dealer, I soon noticed a small leak from the chaincase drain plug. I tightened it slightly, and it stopped the leak for a while.
I recently serviced the bike myself, bought a new 0-ring and applied teflon tape. It's now leaking again.
Any ideas? Silicone? Two o-rings? Make a rubber gasket?
I recently serviced the bike myself, bought a new 0-ring and applied teflon tape. It's now leaking again.
Any ideas? Silicone? Two o-rings? Make a rubber gasket?
Tourer
Joined: Jan 2010
Posts: 304
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From: Woodburn, OR. USA
teflon tape AND an o-ring together and still leaking.... hmmmmm.
I assume you are tightening it to the correct torque spec, over tigtening an o-ring is just as bad as being too loose. If either is not the case I would be looking at ALL the threads (the plug and the hole) for defects, and also look for any cracks or flaws in the casting of the primary cover, particularly around the drain hole that could spread open when torque pressures are applied.
Good luck and hope that helps!
I assume you are tightening it to the correct torque spec, over tigtening an o-ring is just as bad as being too loose. If either is not the case I would be looking at ALL the threads (the plug and the hole) for defects, and also look for any cracks or flaws in the casting of the primary cover, particularly around the drain hole that could spread open when torque pressures are applied.
Good luck and hope that helps!
Last edited by Stomper-63; Mar 19, 2011 at 03:18 PM.
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Joined: Mar 2007
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teflon tape AND an o-ring together and still leaking.... hmmmmm.
I assume you are tightening it to the correct torque spec, over tigtening an o-ring is just as bad as being too loose. If either is not the case I would be looking at ALL the threads (the plug and the hole) for defects, and also look for any cracks or flaws in the casting of the primary cover, particularly around the drain hole that could spread open when torque pressures are applied.
Good luck and hope that helps!
I assume you are tightening it to the correct torque spec, over tigtening an o-ring is just as bad as being too loose. If either is not the case I would be looking at ALL the threads (the plug and the hole) for defects, and also look for any cracks or flaws in the casting of the primary cover, particularly around the drain hole that could spread open when torque pressures are applied.
Good luck and hope that helps!
Tourer
Joined: Jan 2010
Posts: 304
Likes: 1
From: Woodburn, OR. USA
So it was leaking at the correct torque and had to over-torque it, or do you mean you had to retighten it to the proper torque when it started leaking? Another thought... does the plug feel sloppy when screwing it into the hole? You may have an out of spec plug or bad tapping in the hole.
Just trying to shake the tree and see if an epiphany arises....
Just trying to shake the tree and see if an epiphany arises....
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So it was leaking at the correct torque and had to over-torque it, or do you mean you had to retighten it to the proper torque when it started leaking? Another thought... does the plug feel sloppy when screwing it into the hole? You may have an out of spec plug or bad tapping in the hole.
Just trying to shake the tree and see if an epiphany arises....
Just trying to shake the tree and see if an epiphany arises....
The plug didn't feel sloppy, but it doesn't seem to tighten up much before bottoming out. Maybe I should try a new plug and o-ring. I certainly hope and pray it isn't the hole.
Tourer
Joined: Jan 2010
Posts: 304
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From: Woodburn, OR. USA
Being a machinist you could possibly turn a new plug for yourself and put a slight taper on the threads so it will seal up a bit better instead of soley relying on the o-ring... as a last ditch hail-mary.
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Yep. This has crossed my mind, and it should work. I was looking for less labor intensive options first. lol.
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Joined: Jun 2010
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From: WI
Are you sure it's leaking from the drain hole????? I ask because I had a sporty that was leaking from the "drain hole" - until I replaced the crankcase gasket. It's just the way the oil leaked and gravity made it flow towards the drain hole.
Like another poster said, just shaking the tree....
Like another poster said, just shaking the tree....
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Are you sure it's leaking from the drain hole????? I ask because I had a sporty that was leaking from the "drain hole" - until I replaced the crankcase gasket. It's just the way the oil leaked and gravity made it flow towards the drain hole.
Like another poster said, just shaking the tree....
Like another poster said, just shaking the tree....