We didn't used to use any sealant on the brake ring gaskets of a J type and
I can't recall any problems from this area. However oil can come down the
two top studs that clamp the front and back casings together, originally
these have a special copper washer under the nut, special in that the OD is
small so it sits in a recess in the rear case. A more recent modification is
a plastic type of washer, we also used some blue Hylomar on the studs to
help stop leaking. The other common leak point is the joint between the
solenoid and the hydraulic housing, DPOs attemps to remove solenoids without
the special spanner often resulted in burrs (and the leak only happens in
overdrive), a file and a new washer (a curious metric size from memory,
fitted to some sump plugs) usually cures the fault.
John Kipping
----- Original Message -----
From: "Brad Kahler" <brad.kahler@141.com>
To: "John Kipping" <johnkipping@inet.net.nz>
Cc: <fot@autox.team.net>
Sent: Tuesday, September 16, 2003 3:59 AM
Subject: Re: OD gasket sealant
> John,
>
> The 1500 gearbox that is connected to this J-type OD definitely has a
breather on it. We have a 1/4" breather line ran from the top of the
gearbox to a catch tank.
>
> I believe the shop in Nebraska who rebuilt the gearbox for me years ago
didn't use the right sealant for the job. We're going to go through it
again using better sealant, safety wire on all the bolts, etc. Even though
its a Triumph we'd like to hold the leaks to a minimum!
>
> Brad
>
>
> ---------- Original Message ----------------------------------
> From: "John Kipping" <johnkipping@inet.net.nz>
> Date: Sun, 14 Sep 2003 12:51:36 +1200
>
> >Note that a J type overdrive (unlike a D or A type) doesn't have a
breather,
> >and it essential that a breather is open elsewhere on the gearbox. If the
> >breather is blanked off on the gearbox top (as for example on a GT6
> >overdrive box) and a J type put on the back the result is leakage - been
> >there, done that.
> >John Kipping
> >----- Original Message -----
> >From: "Brad Kahler" <brad.kahler@141.com>
> >To: <fot@autox.team.net>
> >Sent: Wednesday, September 03, 2003 9:49 AM
> >Subject: OD gasket sealant
> >
> >
> >> Amici,
> >>
> >> The J-type overdrive in Susan's spitfire has been fighting a losing
battle
> >with oil seepage through the gasket joints.
> >>
> >> This overdrive was rebuilt a couple of years ago and has been in use
for
> >about one race season. The overdrive itself works fine, but enough oil
> >seeps out and then leaks onto the exhaust pipe to cause smoke too flow
from
> >under the car. Enough so that she has been black flagged once it.
> >>
> >> I retightened all of the joints and that helped to a certain extent but
> >the real solution would be to dismantle and reseal all of the joints.
> >>
> >> So my question is, what type of gasket sealant should be used on these
> >joints? I'm not sure what was used orginally but it looks like the
> >non-hardening type of permatex.
> >>
> >> Any help in this area would be greatly appreciated!
> >>
> >> Brad
> >> 1957 TR3 vintage racer
|