frozen caliper pistons, how do I get them out??? Options

[skline]

Alrighty, I am rebuilding 4 911 m calipers, for vented rotors. On some, the piston will not push itself out with air pressure, they are stuck.... Help! I need to do this myself and I am cheap lol. Heat maybe?

BTW this is DRIFTERJAY...not scott...

[Eric_Shea]

You have a very late rear caliper. 75 or 76. I hate those clips. Looks like you've got it tackled but for future referrence, I use a pick and a small blade screwdriver. I use the pick to pull up the corner and slide the screwdriver under the clip and pop it out.

Does the handbrake arm come out? Yes. You will have to destroy the 25mm welch plug to do it though. We don't mess with those unless there's an obvious problem. Repair kits for that section alone are $49.00 from your favorite Ferrari vendor (read: more than a decent core is worth).

If you're insistent then here's what I do: Take a dremel with a carbide cutoff wheel and etch a notch "just" through the surface of the welch plug. The end of the arms is on the other side so... just enough to cut through. Get a large screwdriver and peel the welch plug out. Take the small clip off the end of the arm and the arm and rubber seal will slide right out. You may be able to reuse the seal if it's not in bad shape but... if it's not in bad shape, what the hell are you doing all this for? (IMG:style_emoticons/default/w00t.gif)

Seriously... you may be able to reuse it if you find a 25mm welch plug. PB Blaster touts itself as a seal restorer. It's actually a seal sweller. A small bit of PB plaster on a cloth to clean off the seal should make it work but, make sure you get it in the groove and put back together asap.

This is good info for those having a small adjuster o-ring leak. A little PB blaster on that area may swell the seal just enough to fix the problem. Any fix like that should be viewed as temporary but...