Anyone Rebuilt their Wilwood Calipers??

[Clois Harlan]

How do you get the square cut seals out of the piston bores? How many o-rings should you have for each set of calipers?

Clois

[Buzzmobile]

what are you up too now? If you need help, let me know...I can break anything. Thanks so much for the help, very nice of you to come over and get the baby back in the cradle. Harbor freight run today to get some jack stands so I can jack the back and the front up, maybe sides as well. I want to get it all up and off the ground to do all the "underside" work without the constant moving of the stands front to back. Hell, maybe I just want to buy more tools/toys!

have a good one

Buzz

Buzz

[rdorman]

I have always used a pick to get them out. I don't recall the seals on the wilwood but generally they only go in one way, make sure they go back in right!

For those of you with wilwoods, rebuild them no fewer then every time they need new pads. No dust seals and all.

[D-CEL]

Clois,

All of the Wilwoods have 1 square seal per piston. I also use a small pointed pick to get them out. With regards to the o-rings on the internal fluid cross-over calipers only, you will have a seal at each joint. If you have one spacer (between the body-halves) you will have 2 o-rings. if you have two spacers you will have three o-rings.

Jason

[Clois Harlan]

Thanks Jason and Rick,

I finally got in touch with Wilwood and they confirmed what both of you said. So, tonight I should finish my brake calipers. I have also decided to replace my front brake lines and front braided hoses. Tomorrow is susposed to be in the 80's so if I get everything finished I should be waking up my neighbors about 6:00 am tomorrow for the ride to work.

Clois

[Clois Harlan]

Just a quick follow up to this thread. Last night I pulled the calipers off again and replaced the pass thru o-rings and the piston square cut o-rings and it was very simple. Here is the procedure I used (someone correct me if I have done anything wrong) after disconnecting the brake line to the caliper and removing the brake pads:

1. Removed the safety wire and removed the 9/16" bolts that mount the calipers to the brackets.

2. Place a 1" piece of wood between the pistons and took my air gun and forced the pistons out of their bores (They only came out about half way).

3. Removed the four Allen Head bolts that joins the two halfs of the calipers and the spacer(s).

4. After seperating the two halfs and spacers of the calipers I then took a pair of pliers to pull each piston the rest of the way out using a twisting motion and being careful not to mark or scratch the pistons.

5. I then removed all four bleed screws on the two halfs of the calipers.

6. Using a can of brake cleaner I cleaned all the parts and wiped with a blue paper shop towel and then cleaned again with the brake cleaner being sure to get into each hole and opening with the pressurized spray. Then I blew each piece dry with the air hose and set aside on a clean shop towel.

7. Remove and replace the passage butyl o-rings (one located in the outside of the caliper and the other is located on the opposite side of the spacer. Next take a pick and remove the 1 3/4" square cut o-rings from the piston bores if the didn't come out during the first cleaning.

8. Using the brake cleaner again clean the piston bores and air dry.

9. Install the NEW square cut o-rings back in the bores. Then place the caliper halfs on a flat sturdy surface. I then took each clean piston and poured a little brake fluid over the piston and installed each back in their bores. I used a FLAT block of wood to force them in once I determined each was going in straight.

10. Re-assemble the caliper halfs and spacers back together and your done. Be sure to safety wire your mounting bolts once you bolt your calipers back on their brackets. Re-bleed your system and your done.

This is a very easy job and I found lots of brake dust in my caliper reserviors, so I believe this is a good practice to do each year or when you change pads.

Clois