Stuck caliper piston

[rupertfinch]

Hello. I’m attempting my first (and possible last) refurb of some spare calipers on my Subaru Legacy. They are twin pots and using a borrowed compress I managed to remove one piston on each caliper - did all the wood trick but only one shifting. Now that they’ve been removed obviously the compressor is fairly useless - one seal blew.

So any tips or tricks for removing them. They are off the car.

 

[FM155]

Use a G-clamp or similar to hold the removed piston in and crank up the pressure..

 

[Eager]

We bit of heat maybe ? I know that’s how I helped the pistons out on some 200sx callipers.

 

[Nicky]

Easiest option might be to install them again, even just by connecting up the brake line, and pressing the pedal to squeeze them out.

 

[Apis]

The brake line on the car will give you way more pressure than an airline.

 

[Antoin]

If the piston is out slightly then press it back in with a c clamp or even a vice if you can get at it. That might break any corrosion seal and then try the airline again. With a bit of wood in the caliper to stop it exploding out if it frees itself.

 

[stevieturbo]

Always get the stuck ones out first !

 

[rupertfinch]

Brilliant folks - thanks to all. These were a spare set I’d picked up with the intention of a quick refurb then swap as originals were sticking. First go at it, so plenty to learn/learnt. Appreciated.