Stuck alu in ti

[KeepItSteel]

Clamp the seat post nice and tight in a big old vice. (with the frame upside down).

Now you have the whole frame to use as leverage to twist the bugger off.
You may need to drill a hole in the seatpost and thread a bar through it in order to stop it spinning in the vice.

Rock it from side to side at first.

Give everything a good soak in WD40 beforehand...updside down ideally so it gets a chance to get work the bottom of the seat post.

Applying heat to the seat tube area could also help break the seal.
Sounds like no copper grease was used when the post when in.

 

[FMJ]

If it's a bonded in or press fit sleeve, the only way to remove it without risking damaging the seat tube is to bore/ream it out.

 

[Andy R]

Clamp the seat post nice and tight in a big old vice. (with the frame upside down).

It's just a shim, not a seatpost - and it's probably bonded in.

 

[KeepItSteel]

Clamp the seat post nice and tight in a big old vice. (with the frame upside down).

It's just a shim, not a seatpost - and it's probably bonded in.

OHH! I see , mis-read the original post.

DONT TRY AND REMOVE YOUR BONDED IN SHIM!

are you nuts?

 

[Dr.Robotnik]

Leave well alone, you are making trouble for yourself.

This is a very common place for Titanium frames to crack.

If it really won't work....

Ream GENTLY to 27.2mm, this is the best you should do.

 

[Enid_Puceflange]

Fromwhat I remember ............

When Aluminium and titanium are in raw contact with each other they "weld" themselves together , they sorta bond to each other

I remember the hassle I had with my old Syncros Ti bb & Alu cranks :roll:

Copius amounts of copper grease several times a month

Gc

 

[Huntso]

So its the alu sleeve that should be there ironically to stop the seatpost bonding with the ti
Got one on my Merlin, why would you want it out anyway