On 18/03/2014 19:22, Roger Mills wrote:
On 18/03/2014 16:24, Broadback wrote:
I have several radiators where the bleed valves are jammed (corrosion?).
I had to take one to a metal worker where he sealed off the old valve
and installed a new one, rather a PITA. Any ideas that I could try to
free them? With the original problem I tried to force it and b*ggered it
up.

Is the bleed screw itself part of a larger assembly which screws into
the end of the radiator, or does it screw into a small hole tapped
directly into the radiator?

If the former, you can easily replace the whole assembly. If the latter,
it's more difficult!
Thanks for all the tips. It is a fairly old ( circus 2000)so the valve
screws directly into the radiator, also there is only 2 entry/exit
points at the bottom of the radiator, so it looks as though I will have
try the heat method.