Author Topic: Small problem with an "O" ring seal  (Read 284 times)

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Offline Panzer

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Small problem with an "O" ring seal
« on: August 18, 2017, 07:46:29 PM »
How do you keep the oil drain plug "O"ring from squishing out when you tighten the drain plug?
I've tried different size "O" rings to no avail........any suggestions?
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Online tmwmoose

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Re: Small problem with an "O" ring seal
« Reply #1 on: August 18, 2017, 08:13:10 PM »
When the hole is machined and threaded there's a small chamfer at the entrance for the o ring and after some time usually overtightening, the threads pull out a bit and you lose the chamfer. I stayed at a Holiday inn express last night :sheep:

Offline Panzer

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Re: Small problem with an "O" ring seal
« Reply #2 on: August 19, 2017, 05:08:15 AM »
When the hole is machined and threaded there's a small chamfer at the entrance for the o ring and after some time usually overtightening, the threads pull out a bit and you lose the chamfer. I stayed at a Holiday inn express last night :sheep:

Treads are good, never over tightened.
It's just that the "O" ring wants to roll out when I go to tighten the plug.  :scratch:

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Online tmwmoose

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Re: Small problem with an "O" ring seal
« Reply #3 on: August 19, 2017, 06:23:18 AM »
Well what ever the cause then, the fact is that you don't have a recess for the o ring to be captured in so now you have two flat surfaces meeting were is the o ring sits  your o ring has no choice but to be squeezed out

Offline Panzer

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Re: Small problem with an "O" ring seal
« Reply #4 on: August 19, 2017, 01:45:02 PM »
Gotcha......ok.
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Offline FSG

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Re: Small problem with an "O" ring seal
« Reply #5 on: August 19, 2017, 02:17:03 PM »
Crankcase or Primary?

Your Primary uses Plug 60328-98B with O-Ring 11105, if there's no recess in the bottom of the primary for the o-ring then I'd either make one OR ditch the o-ring for a copper washer(s).




Offline Panzer

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Re: Small problem with an "O" ring seal
« Reply #6 on: August 20, 2017, 07:50:07 PM »
Chaincase.............sorry.
Had "O" ring when the bike was new so it has to have a recess.
I've tried a couple of different ones.......nada.  :nix:
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Online tmwmoose

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Re: Small problem with an "O" ring seal
« Reply #7 on: August 20, 2017, 08:59:00 PM »
Try some auto parts joints or better yet McCaster Carr and find a hard nylon washer that fits snug as possible on the plug . If it was me I'd go see my machinist bud and see what he had in a large ass drill bit with a fairly steep angle and cut/refresh the relief turning the bit by hand .Be nice if one of those unibit drills had a size that fit good in the hole with the next step just right for a relief cut, just thinking :scratch:
Just remembered McCaster has washers that have o rings fixed in the id in different sizes HD use to use them on the first EVO wet clutch derby cover screws
« Last Edit: August 20, 2017, 09:05:02 PM by tmwmoose »

Offline cyclobutch

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Re: Small problem with an "O" ring seal
« Reply #8 on: August 22, 2017, 08:04:48 AM »
Switch to a Dowty Washer?

B

Offline Panzer

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Re: Small problem with an "O" ring seal
« Reply #9 on: August 22, 2017, 05:19:53 PM »
Switch to a Dowty Washer?

I call them oil seals.......... :nix:
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