r0nd3L

Is there a good How-To on rebuilding calipers? My 05-06 GTO calipers that I bought for my 2004 GTO need to be rebuilt and I haven't found anything useful. Also, would you guys know if C5 or C5 caliper rebuild kits would work on GTO PBR calipers?

Bimota Guy

I use the factory rebuild kit, so you can just order for your car at a dealer. Rather simple job. Compressed air is very helpful. Drain the fluid. Put a small block of wood at the outer edge of the caliper and a small amount of compressed air at the brake line connection will pop the pistons. Upon reassembly, I seem to recall the dust boot/seal was the biggest PITA as it needs to stretch quite a bit to get it on the piston. Grease those slide pins well.

jaa1992

Popular Mechanics recently had an article about rebuilding calipers.
I didn't find anything new in it, but if you have never done it its a good read thru so you know what is involved.

0Randy@DRM

I did a few videos because I get asked all the time. Because we sell the SS pistons for the PBR calipers. Buy GM rebuild kits, I ordered in some from a aftermarket company. One of the seals had a rip in it out of the box. So I throw those away and will never try them again.

BrianCunningham

ghoffman

I use those bamboo kabob skewers to dig out the seals. They are cheap and won't scratch the aluminum caliper bores.

r0nd3L

Thanks a bunch, really helpful videos.

Now I just need to figure out if Corvette rebuild kit will work for GTO calipers.

0Randy@DRM

Do they have rebuild kits for the GTO?

Randy

froggy47

Do you need to hone out the cylinder, like a block on an engine?

Or if it's scored, just toss it?

Sidney004

If there is any scoring, it is probably corrosive pitting; just toss it. Always inspect the bleeder seats, corrosion can eat away the seats.

r0nd3L

Thanks a bunch guys, that video helped a ton! I took them apart while waiting for the rebuild kit to come in and found a small nick on one of the pistons. My buddy said it should be fine, what do you guys think?

Sidney004

I think it is fine; that nick is nowhere near the sealing surface. Make sure there are no burrs on the nick that might damage the seal as you push the piston in; otherwise deburr it.

0Randy@DRM

Two swips with a small file, press light. And a quick wet wipe with some 600 grit or worn out scotch bright grey and you are done.

Randy

r0nd3L

Awesome, thanks guys!!!

Rebuild kit is coming in next week so should be able to assemble them. I practiced a bit using old boots and it seems really simple

Just need to order some brake lines and a set of track pads and I should be ready for my first ever track day

0Randy@DRM

Wait a minute. Just because it's super late friday night, doesn't mean I should quit selling. Check out our options for brake lines and race pads. By the way, you should throw those pistons away!!!

Randy

varkwso

thats the spirit!

nice videos..

r0nd3L

I would buy lines and pads from you, but do you have them for GTO?

0Randy@DRM

Prices will be in your pm box Monday AM.

Randy

r0nd3L

Awesome, will be waiting

I have another noob question.

I took off caliper pins and I tried putting them back on and I can't seem to get them aligned right. If I just put on them on the caliper, tighten them down, then try to slide the bracket on, it seems pins are misaligned and bracket doesn't slide smoothly. If I loosen two pin nuts slightly then I can get the bracket to slide smooth but as soon as I tighten them down again the bracket doesn't slide smooth

avizandum

What's the best grease for the pins?