2006-06-14 14:38:58 · 6 answers · asked by larry s 1 in Cars & Transportation ➔ Maintenance & Repairs
'Williams H' is right ! ! ! DO NOT ATTEMPT TO FORCE, PUSH, PRY OR OTHERWISE SHOVE THE PISTON BACK INTO THE CALIPER. The newer GM type rear calipers HAVE to be turned or screwed back into the caliper. There are specialty tools available from the dealer as well as any auto parts store for this specific task. However I have always been successful simply and CAREFULLY using a pair of curved 'needle-nose' pliers. You should notice two cut-outs in the piston... these are there for the specialty tool to fit into allowing you to easily twist the piston back into the caliper. As the post earlier mentioned, you WILL need to either remove the cap from your mastercylinder or at least loosen up the 'bleeder' screw on the top of the caliper to allow somewhere for your brake fluid to go to as you force it back out of the caliper as the pistons moves back into the caliper housing.
Sidenote - be VERY carefull not to damage, score, or even scratch the outer diameter surface of the piston, as this would likely lead to a brake fluid leak between the piston and the caliper's piston seal.
Good luck to you.
2006-06-14 20:36:28 · answer #1 · answered by L A 3 · 0⤊ 0⤋
The best way is to use a tool specially made for this. If you are careful, you can squeeze the piston back by gripping the caliper and piston together with a large pair of channel-lock pliers. You have to be careful not to damage the neoprene seals.
2006-06-14 14:46:01 · answer #2 · answered by expatmt 5 · 0⤊ 0⤋
not exactly the safest way but i always pry it in with a flat heat screwdriver between the old pad and the rotor. if that doesnt work i squeeze it with large chan-el-lock pliers. c-clamp works well but is a little slower. also make sure to correct the brake fluid level after you are done since it will rise alot with the piston retracted
2006-06-14 15:04:38 · answer #3 · answered by 70xbody 2 · 0⤊ 0⤋
You can use a very large C clamp or use the jack handle to force it back in using a pry motion. Do not hit it with a hammer and before you start loosen the top of the master cylinder. don't forget to bleed the brakes afterward.
2006-06-14 14:43:28 · answer #4 · answered by smgray99 7 · 0⤊ 0⤋
On the rear you will need to buy a special tool because the piston turns in, it just doesn't push in like the front ones.
2006-06-14 15:05:55 · answer #5 · answered by mister ss 7 · 0⤊ 0⤋
the best way to do it is with a large c-clamp just tighten it slowly and easily if you use anything else besides a clamp you risk breaking it, bending it or messing up the seals
2006-06-14 14:49:29 · answer #6 · answered by johndeerecrazy22 1 · 0⤊ 0⤋