I have taken apart the front calipers as only one piston was working properly after sitting for 12 years, but I have one which will not budge. I have soaked it in hot water and tried using my airbrush compressor which freed the other three no problem ( quite spectacular when the first piston shot out of the sink) do you think I just don't have enough pressure to free it, or is there anything else to try?

Any help appreciated

Ali

Make a adaptor, fit a grease nipple..........messy, but functions.

Don't know if would be able to make something like that

Did mention a adapter, since remember doing this on different old cars and used grease nipples that I got laying around.

But a bit search, grease nipples which fits the threads where the tube connects is available (M10x1,0).

Use some teflon tape around the threads, and be sure to clean away all grease afterwards.

Grease nipples.

I'll look in to that, thanks.

managed to get it free with a bigger compressor!

Bigger = better. Well done mate, now you will have to buy yourself a bigger compressor in case it happens again. That's always my excuse to go shopping
RT