4ltr rear brake advice pls

[old No 1]

Changing the discs/pads on the rear of the Griff, and can't seem to get the pistons back in the calipers?
Are they 'screw in' type or just push in jobbies???
Had a G-clamp on them but couldnt get them back and didnt wana push too hard
cheers

[shpub]

They are screw in and you will need a tool from Halfords to do it. Could use pliers but very likely to damage the piston.
Covered in the bible 2nd edition in gory detail.

[starmist]

You can do it without the tool, but it's fiddly, and as Steve says, you could damage the pistons. It involves gripping the exposed edge of the pistons, and truning them whilst applying pressure to the piston face to force it back. Might as well buy the tool for a tenner, as you'll only need it again.

[GreenV8S]

starmist said:

It involves gripping the exposed edge of the pistons, and truning them whilst applying pressure to the piston face to force it back.

NO NO NO you don't want to do that, not ever. The piston face has a shaped surface which enables you to turn and push it at the same time. As others have mentioned, there's a special tool which costs a few quid and makes this trivially easy. But you can do it using fine nosed pliers or any other tool capable of engaging on the piston.

[k77-widow maker]

GreenV8S said:

starmist said: It involves gripping the exposed edge of the pistons, and truning them whilst applying pressure to the piston face to force it back. NO NO NO you don't want to do that, not ever. The piston face has a shaped surface which enables you to turn and push it at the same time. As others have mentioned, there's a special tool which costs a few quid and makes this trivially easy. But you can do it using fine nosed pliers or any other tool capable of engaging on the piston.

And if you use the tool, it's a complete doddle to adjust, it will be the best £20 you will spend on tools.

[old No 1]

cheers guys
Thought as much, cos of the grooves in the piston face.
Had the same on a Audi years ago and spent hours trying to squeeze pistons before i was informed !!!