Strange Directional Caliper Rebuild
 

Does anyone sell a rebuild kit that gets away from the square O-rings for these? Any other recommendations would be helpful. I did a search and read about using scotch brite on the pistons. Someone mentioned a lube as well. Any help or recommendations would be appreciated.

Thanks
Sean

Re: Strange Directional Caliper Rebuild
 

I have several sets and rebuild them regularly I take them apart clean them well with brake clean, I use steel wool to clean the pistons and the cylinders, the square O rings are all I am aware of and you want to reassemble with sil glide they sell it a NAPA

Re: Strange Directional Caliper Rebuild
 

What's the reason for the rebuild? Do they start sticking or leaking? I've put them on my car about 8 years ago and haven't touched them.

Re: Strange Directional Caliper Rebuild
 

Thanks Marco,

I have not had any problems with them. Just trying to free up the brakes. I have installed springs in-between the pads to help reduce drag. Its my understanding that on Wilwood calipers that others have replaced the square O-rings with a traditional one and that helps the piston retract. I have had these for 7 years or so. I have seen other stockers with the wheels off the ground and the wind alone rotates the front wheels. Mine takes effort to move them.

Thanks for the help.

Sean

Re: Strange Directional Caliper Rebuild
 

The idea behind a square o-ring is that it will rock slightly when pressure is applied and rock back when released , thereby slightly retracting the piston.
If you are experiancing excessive drag ,I'd be looking at caliper squareness, or excessive residual pressure caused by the brake pedal /master cyl clearance or the master cyl itself.
Calipers not being parallel to the rotor is a common problem ,especially on rear housings.
Even when using a good narrowing fixture ,I've seen housing ends measure .015-.020" out of square at the housing which is .060" or more at the end of the rotor.

Re: Strange Directional Caliper Rebuild
 

Tom,
I will re-evaluate how square I have the calipers. I have removed the factory proportioning valve and installed an aftermarket one. I have new flex brake lines.

Thank You
Sean