Help! Frozen Stem in Fork

Larry Desay said:

Anybody, I installed an aluminum stem in a carbon
fork/steel steerer tube and it's in tight. No way do I
want to twist the stem from the fork. I cut the stem from
the quill to remove the fork from the frame. There is
about 3/4 inch of the quill extended from the fork.

Quoted message said:

After reading some methods from Jobst Brandt I feel this
may necessitate the skill of a good frame builder.

Quoted message said:

Any Suggestions

draco.acs.uci.edu8e.11.htmlOpen ↗

Jobst Brandt [email hidden]

It's amazing to me that no one has come up with a boot
or adequate seal to keep sweat from getting down into
this joint.

--
Mike DeMicco <[email hidden]> (Remove the
REMOVE_THIS from my email address to reply.)

Mike DeMicco said:

It's amazing to me that no one has come up with a boot
or adequate seal to keep sweat from getting down into
this joint.

Rather, it's not widely sought for and adequately
implemented. A mylar shim would just do the trick.

Sergio Pisa

Mike DeMicco said:

It's amazing to me that no one has come up with a boot
or adequate seal to keep sweat from getting down into
this joint.

For years Campagnolo and Shimano, as have others, offer
their threaded headsets with a seal in the lock nut. In
spite of this, they suck sweat into the interface because
the stem wobbles from side to side, something most seals do
not handle well.

The problem should vanish as bicycles in general switch to
threadless headsets where the stem is securely attached and
is not prone to corrosion in a fretting gap. This is the
main improvement this design has brought with it. The
threadlessness is immaterial and an unfortunate naming
appendage. It is the first bar stem since the days of yore
when Cinelli track forks had an expander at the bottom of
the stem and a clamp at the top.

Jobst Brandt [email hidden]

Mike DeMicco said:

It's amazing to me that no one has come up with a boot
or adequate seal to keep sweat from getting down into
this joint.

If you fitted the stem with a liberal amount of anti-seize
you could then seal round the top with clear silicone. It's
not so strong that it would stop you getting the stem out
again, and hopefully the need to regularly remove and
regrease it would be eliminated as there would be no
sweat/rain getting down there.