shall I rebuid or get new caliper pix

nono54 · nono54's Garage

hi there
so I finally got the calipers out, cleaned them but looking at them I wonder if I should get new ones

Is the inside should look like this
the piston look fine to me
look at those pics
and give me your advice please

AB

DarinB · 03-29-2009, 12:26 PM

I would clean it up and rebuild it. If your not getting any brake fluid seepage, then your fine. It's only about $15 for the seals, so why not give it a try?
Darin

Flieger · Flieger's Garage

They look great to me. I have seen photos of much worse.

cgarr · cgarr's Garage

Are those steel or alum pistons?

nono54 · nono54's Garage

they seem to be steel
AB

Rouxzy · 03-29-2009, 05:15 PM

At this very moment I'm rebuilding mine. I'm using a dry green scotch brite and it is shining everything up. I wish mine looked as good as yours before I started. I'm glad I decided to rebuild when doing a brake job because it looked as though the fronts weren't working as good as the backs. In fact one of my front pistons was a bit&* to get out. But after some time with the scotch brite it looks pretty good.
Tom

vash · vash's Garage

those look great! rebuild away.

djpateman · 03-29-2009, 05:46 PM

That looks better than average in my experience. I hope that is not a dimple on the piston, but even so it looks small enough that is should not be a problem; no more than half the width of the O-ring seal in my estimation. The green scotch brite pads are very good for cleaning brake parts. Use a Q-tip in the O-ring seal groove to get out all the crap. Scrub the bore outside of the O-ring seal groove as best you can; this is where most build-up occurs that interferes with piston action. Rinse well with alcohol, and blow it clean with compressed air. I always use brake assembly lube when rebuilding, but I am not sure where you can get that stuff these days.

ruf-porsche · ruf-porsche's Garage

Rebuilt my calipers last summer, but I went with stainless steel pistons.

Nine9six · Nine9six's Garage

Quote:

Originally Posted by cgarr

Are those steel or alum pistons?

If the weight in your hand is unsure, a magnet will tell for sure.

nono54 · nono54's Garage

thanks every one
AB

defcon65 · 04-01-2009, 08:09 AM

Just rebuild them; the kits are cheap and available here. You will need silicon brake assembly grease, a compressed air source, 400 grit silicon carbide paper, brake cleaner spray and a selection of C-clamps and small chunks of hard wood to seat the dustboot retainers. I found it to be an easy and satisfying DIY project. I also put speed-bleeders on it for simplified bleeding. If they're really filthy you can soak them in kerosene for a couple days to loosen the crud.

Jared at Pelican Parts · 04-01-2009, 10:19 AM

Look fine to me. Just new seals and you're good to go.

berettafan · 04-01-2009, 11:09 AM

wow i wish mine looked that good.

tomphot · 04-01-2009, 12:14 PM

Both of my front dustboots were in shreds - as a result, the part of the cylinder on the outside of the O ring seal had gunk on them as well as the pistons. After working on the pistons, they look as good as new - the cylinders look great on the inside of the O ring but a bit stained on the outside.
They seem to work a lot better now than before the rebuild.