opening a GM caliper

[IOPort51]

this is a GM Cadillac Eldorado rear disk brake caliper. does anyone know of a way to open it about .075". I don't want to turn the rotors. This is for the rear wheel disk project on the Dana 44 .

 

[Purple77CJ7]

On a lot of those calipers you have to have a special tool to turn the piston in. Check your local auto parts store. They should have some thing. Maybe KD brand.

 

[Purple77CJ7]

Disc Brake Piston Tool- KD Tools-Tools-Mechanics & Auto Tools-Automotive Specialty Tools This will work for you.

CTA Tools 1462 Rear Disc Brake Piston Wind-Back Tool Kit, 18-Piece--Appliances-Air Purifiers & Dehumidifiers-Humidifiers. I use this.

 

[Old Dog]

.075 isn't much, could you just machine that much off the side away from the piston?

 

[Old Dog]

IO what rotors are you using? How do they mount?

 

[IOPort51]

OK I got it.

this is a problem because none of us has ever worked on a disk brakes with an E-brake!! The e-brake ratchets out as you use up the puck.

they sent them to me just a tad bit too close so I had to remove the e-brake arm and wind it back and compress the piston with a clamp.

anyway the calipers are from an 85 Eldorado and I am betting the rotors are as well but they have been redrilled for a 5 on 5.5 or they were made from blank castings.

these are from the streetrod manufacturing co. and hopefully they are in business as long as I need rotors. I plan on taking good care of these.

 

[Purple77CJ7]

Use caution with this style of caliper. Using a clamp to compress the piston can damage the internals. You have to thread in the piston. I learned that the hard way.