quote:Originally posted by lastpushbutton:
Welcome Pete. I sent a customers calipers to John Hayworth racing brakes in Charlotte Nc he said they were frozen up and used a high pressure co2 bottle to push out the pistons. Just an idea if shop air is not enough. Be careful. Bill 1362
Hi Bill,
Thanks for the advise. Fortunately I got lucky and didn't have to resort to high pressure bottle. After breaking the calipers apart and soaking the area with LPS-2, I got a rather large C-clamp and wood shims in position and depressed the pistons about 1/4 inch into the bore. Worked them back out slowly with a miniature 90 degree crowbar under the piston lip. Wiggled them out the rest of the way with channel locks with the jaws covered with tape. Worked like a champ with little or no damage to the piston lips or caliper. Minor pitting in the bores in a non-critical area, and pistons cleaned up nicely with scotch bright pad. Will do some micro polishing of the pistons before re-assembly.
I got to admit, a small part of me was hoping they were beyond salvage so I would have an excuse to buy new Wilwood's and discs all around. But the greater part of me (the cheap part) was happy to just need new seals.
Pete C.