I figured that your idea of using the car to push out the pistons was a good one. However if you have a leaking piston and have lost fluid apparently it doesn't. I tried. Hooked the calipers up to the car again, pumped the brakes, all that happend was brake fluid squirted out of the piston. Neither side's pistons popped out.MetaPhysicalPajamas - 5/4/2005 7:14 PM
Air hose may blow the pistons out. While they are hooked up to the car the brake pedal will blow the pistons out.
That is not always true. If brake fluid doesn't push the pistons out, the only thing it tells you for sure, is the cylinder is not completely sealed. I just rebuilt both front and read Teves calipers on my 1981 240D. It is actually very easy to do. There will be some minor oxidization, just make sure there is no pitting or scoring. The inner seals will probably be in good shape but worn down. The heat shields and dust covers will probably be shot. I used a buffing wheel for my power drill to clean the pistons and cylindars. Don't forget to lube everything with brake fluid before reassembly. Also, I let all of the parts soak in a dish of brake cleaner for about 45 minutes. I went from one working caliper in the front, to 4 completely working calipers. My car stops on a dime now. When you put the pistons back in, they will be very hard to push down. I used a c-clamp to slowly push them down.I know this thread is 5 years old. I just pulled my pistons out. I'd think that if you can't slide them out, your calipers/pistons are beyond repair (probably with corrosion or pitting) and buying a rebuilt caliper is probably smarter.
Also, if the brake fluid doesn't push the pistons out, why would air from a pump?
I rebuilt the calipers on my coupe 15 years ago. Never again. Unless you've got moths in your wallet or too much time on your hands, I strongly recommend simply buying rebuilt calipers. The take-offs will be required as core.
ATE = teves. If my memory is correct ATE is short for "Alfred Teves Enterprises" I am not sure what the 22 is for, mine say 60.Hey there MerzDiesler:
Thanks for the info. I'm trying to make sure I buy the right rebuild kit, and I'm pretty sure I have a TEVES with the (scriptlike) "Ate" written on it, and a big "22".
I got rebuilt front calipers from AutohausAZ for $70 each a couple weeks ago. Bendix, and very nice. Will cost a bit in shipping to send the cores backj, but the shipping to me was free. Given that the rebuild kits were $35ea, this seemed like a no-brainer to me. My time is worth much more than the difference in price.I am suprised to hear you had a hard time with your calipers. They must have been in pretty rough shape. I was able to do each caliper in about and hour (4 hours total). Paying ~$20 per rebuild kit is much better than ~$200+ per caliper.
My calipers are ATE, I have never seen them that cheap. If I found quality rebuilt ATE calipers for that price, I might have reconsidered my position.I got rebuilt front calipers from AutohausAZ for $70 each a couple weeks ago. Bendix, and very nice. Will cost a bit in shipping to send the cores backj, but the shipping to me was free. Given that the rebuild kits were $35ea, this seemed like a no-brainer to me. My time is worth much more than the difference in price.
My calipers looked like they had been on the bottom of the ocean. Completely siezed on all four pistons.
They musta seen ya comin' cuz mine didn't run anywhere close to that. Kinda sad too, see'n as how you live so close to AutoHausAZ. Like I said, it's been 15 years. But I think remanufactured calipers from NAPA were somewhere in the neighborhood of $50/$40 front/rear, as opposed to rebuild kits around maybe $12-$15. I changed the master cylinder, and all the flex lines while I was at it. That brake job is still on the car today.Paying ~$20 per rebuild kit is much better than ~$200+ per caliper.