Hi, Alan -
I don't know about the chemistry, but the diff and gearbox drain plugs are,
I believe, a pipe thread. That may make a difference. I still use the
PTFE/Teflon tape on those, too, and haven't had a problem with leaks or
weeping -- at least to where it's a problem. As long as it doesn't leave
spots on the floor, I don't worry about it.
Steve Byers
HBJ8L/36666
BJ8 Registry
Havelock, NC
-----Original Message-----
From: healeys-bounces+sbyers=ec.rr.com@autox.team.net
[mailto:healeys-bounces+sbyers=ec.rr.com@autox.team.net]On Behalf Of
Alan
Sent: Sunday, September 02, 2007 11:10 AM
To: Healeys@autox.team.net
Subject: Re: [Healeys] fuel line
Guys.
The chemists among you may be able to comment on my observations. In an
attempt to deal with the last few niggly oil leaks on my BJ8 I used PTFE (is
that what you call Teflon?) tape on the threads of the diff plugs and
gearbox drain plugs. It appeared to work for a while but then mysteriously
the slight weeps down the threads returned.
On investigation it appeared that the tape was dissolving in the mineral
oil. Does that sound feasible?
Hylomar did the trick instead.
Regards..........
_______________________________________________
(______________ Alan Bromfield _______________)
(______ \____1957-BN4 ___/ _______)
(_________________________)
http://www.nfahc.co.uk
http://www.healey-weekend.com
-----Original Message-----
Healeyguy@aol.com
Sent: Sunday, September 02, 2007 7:04 PM
To: Healeys@autox.team.net
Subject: Re: [Healeys] fuel line
I guess that easiest way to look at the tape, no-tape issue is if the tube
joint has a flared connection (including compression fitting) or not. There
is
no reason to use tape on a flared fitting as the fluid seal is at the flare
not the threads. Actually having to much tape on the threads of a flared
fitting may keep the fitting from exerting adequate pressure on the back
side of
the flare. Sloppy home made flares also cause a bunch of problems.
Aloha
Perry
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