The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 47-55.1 Cadillac El Dorado/Seville rear calipers with parking break leaking

**mr48chev** · 12-06-2020, 06:08 PM

Looking at this kit for the 79 Seville Caliper it looks like that button is a cover for the the hole part of the park brake assembly goes though. My guess is that one or more of the small O rings you see are inside that piston and are supposed to seal against the leak you are getting.

You can probably find the kits in several brands at parts houses but I have never had one of those apart and do not have any knowledge of the what's where's and how's of doing it even with all the brakes I worked on in my life.

A search doesn't bring up any specific instructions on working on that model of caliper. They may be in the factory service manual but finding one at the local Cadillac dealer that is that old may be a challenge unless they have them on the computer and can bring up the pages and print them out for you.

12-06-2020, 06:08 PM	#2
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 16,395	Re: Cadillac El Dorado/Seville rear calipers with parking break leaking Looking at this kit for the 79 Seville Caliper it looks like that button is a cover for the the hole part of the park brake assembly goes though. My guess is that one or more of the small O rings you see are inside that piston and are supposed to seal against the leak you are getting. You can probably find the kits in several brands at parts houses but I have never had one of those apart and do not have any knowledge of the what's where's and how's of doing it even with all the brakes I worked on in my life. A search doesn't bring up any specific instructions on working on that model of caliper. They may be in the factory service manual but finding one at the local Cadillac dealer that is that old may be a challenge unless they have them on the computer and can bring up the pages and print them out for you. __________________ Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.