TOOL HELP: NEED a Caliper piston retraction tool
 

does any one know if a tool exists that will retract the 2 (inner & outer) brake caliper pistons on a 911 caliper...??

My situation is such that I cannot remove the caliper from the car unless I ruin either the steel and/or the rubber fluid hose as they are seized in place. (((( I DO NOT WANT TO RUIN THE LINES )))))

I also have the brake rotors on the car & no brake pads on the car as I had to chisel the brake pads out of the car to enable me to roll the car...

ALL of the tools on pelican are for when the caliper is off the car or won't help me from what I can see...

Thx.. Bob

I've got one of these and find it really useful for the type of thing you describe, not much help it being an English website but you may find these over your side of the pond. Clarke CHT268 Disc Brake Piston Spreader - Machine Mart

Good luck

Ian

Bob,

They're available on Ebay,i was going to eventually get one myself ...

Cheers !
Phil

any auto parts store sells them for $10 or so.

Thx guys...I'll check w/ a visit to the local parts stores but on the phone they said they did not have what i was explaining, but, I probably did not explain it very well...

I went online to ebay & found a zdmac tool that will do it perfectly...

Thx again guys...

Bob

Bob,

That is the name of the company on Ebay that sells quite a few Porsche tools ... i purchased
the valve adjust feeler gauge and some spare blades from them ...

Cheers !
Phil

try a tool truck. should be generic.

I can even find them in my tool box.....most corner AP stores have them.

You might want to consider replacing the lines....never know what the insides are like. BTW, when was the last time you changed the fluid?

http://www.audiworld.com/tech/pics/w...erSpreader.jpg

Kragen/ O' Reilly has them, as does Pep Boys. I'll post a pic later.

My understanding is to depress the pedal about 2 inches then open the bleeder valve when you retract as not to damage the MC, apparently the pistons exert allot of pressure and allows the caliper debris to flow out the valve as it is retracted

That's a good tip, Draco. To use this tool, you have to remove the caliper mounting bolts and the pad retaining pins. Insert the tool through the hole where the caliper retaining spring goes, and turn the screw to spread the pads. Do not use the tool directly on the brake pistons.http://forums.pelicanparts.com/uploa...1325566206.jpg

if the lines are stuck, the rubber ones may be bad, inspect them for cracks.

if it is a dual piston caliper, place a pad on one side and have somone slowly press the brake to break the piston lose, then do the other piston.

i have a large set of channel lock pliers i bought from sears that i use to push the pistons back in.

thx guys for all of your help posts...I rec'd the zdmac tool today & it worked perfectly...my main issue here was that I could not remove the calipers from the car due to corrosion & the lines pretty corroded also, thus I needed something that I could insert into the caliper while it is on the car & insert the tool into the area where the 2 brake pads go...1 paddle of the tool on 1 side of the rotor & the other on the other side of the rotor...
The lg machine screw holding the paddles onto the tool you turn & it spreads the paddles applying pressure to the caliper pistons - pushing them back into the caliper...
I hope this explains it well enough as my camera is dead & I have not figured out how to work the new one yet...!!!
Thx again all...Bob

t

I will second the recommendation to check the lines etc. IF things were so bad that you had to chisel the pads out, then it is likely that the calipers need to be rebuilt, and given the amount of corosion you seem to have, you should remove and replace all the hardware. Get some PB Blaster, Kroil etc whatever your favorite penetrating oil is and soak the hw liberaly with it. you probably want to flush out the brake fluid, and your bleeders are probably frozen in place so you have a bit of a chore ahead.. something this gunked up is likely to be a safety issue. Brake lines, bleeders etc are cheap compared to your life.

10-4 Bullethole...I just want to be able to drive it up & down the driveway for now...slowly...It will probably need replacement of calipers, pads, rotors & lines when I get to it...just want to be able to see how she runs...

Thx again guys...

c-clamp