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#876726 04/04/22 10:25 pm
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Anyone have a problem with the fork oil seeping past the threads of the chrome seal holders. 67 Spitfire.

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Plumbers Teflon sealing tape might help.

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Yes. Service manual specifies "#5 cotton twine" in the groove at the bottom of the threads. One time I asked for "#5 cotton twine" in a hardware store, and the clerk looked at me like I was from another planet. So I try to find a good stiff twine that looks to be of an appropriate gauge, and I prefer the woven to the twisted sort. I also dip the twine in melted wax, and smear some silicone over all when done. Teflon tape on the threads also helps. Basically, do everything you can to keep them from leaking. Mine still leak ever so slightly, especially when hunkered down on its springs on a trailer.

There is also an O-ring that can take the place of the twine, but of course the forks must be disassembled to install that.


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Take some teflon tape and twist it into a string. dig out what is left of the twine and replace with the teflon string. I would ( and did) get some teflon tread sealing paste and put that on the threads as well ..... had no leaks!

Teflon tape, rather than paste, might help on the threads but the threads are a bit fine for it in my view. If you can, get the paste that is approved for Gasoline etc. but honestly I personally doubt there is much, if any, difference. We are not taking about high pressure here!

If all else fails, just remember that all oil leaks eventually stop.

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When building a set of forks, I have always used an O-ring instead of the twine. But to fix in place, a waxed twin is likely gonna be a decent solution.


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Thanks for the advice friends. When I assembled the forks I never thought that a leak could occur there. At first I thought that the fork oil was leaking around the bolt at the bottom that holds the dampener. So I will dissemble and take appropriate measures. Thanks.

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Originally Posted by Dave Martin
Take some teflon tape and twist it into a string. dig out what is left of the twine and replace with the teflon string. I would ( and did) get some teflon tread sealing paste and put that on the threads as well ..... had no leaks!

Teflon tape, rather than paste, might help on the threads but the threads are a bit fine for it in my view. If you can, get the paste that is approved for Gasoline etc. but honestly I personally doubt there is much, if any, difference. We are not taking about high pressure here!

If all else fails, just remember that all oil leaks eventually stop.

FWIW, "pipe dope" is the paste form of Teflon tape. Find in plumbing supplies.


Mark Z

'65(lower)/'66(upper, wheels, front end, controls)/'67(seat, exhaust, fuel tank, headlamp)/'70(frame) A65 Bitsa.

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