in process of changing rear pads. help!

[brad1]

hi there
my car is currently on axle stands and im in the process of changing the rear pads. the caliper is off and the pads are out. i just cant compress the piston back in. handbrake is off and brake fluid bottle is undone
any help asap
cheers

 

[dj-hectic]

i got caught out with this on my golf last year,i think the pistons need to twisted round to compress them,cant remember what way

 

[brad1]

stick something in the groove and turn ??

 

[dj-hectic]

yeah thats the one,i used a bit of steel plate.

 

[brad1]

mine is really stiff and dont want to budge

 

[BCM]

Theres a special tool to do it!
You can do it without but its a pain in the ass!
You need to push it in and turn it at the same time!

 

[brad1]

but to compress it in, which was must you turn it
cheers

 

[mrcoyote]

Get a caliper windback tool. From memory they're cheap enough...

 

[UncleFester]

about 15 quid from a motorfactor

 

[brad1]

shop names?

 

[UncleFester]

I'd have thought halfrauds would do one - i know Motorserv in Milton Keynes do - it's a generic tool AFAIK

 

[BCM]

Should be less than 20quid from Halfrauds!
Just buy it, saves you a bit of cash in the future!

 

[Timmbo71]

Sounds like how the rover 600 abd 800s operate. Stupid idea if you ask me! And always stiff! Good luck mate

 

[brad1]

whats the exact name of it from halfords, cheers

 

[Timmbo71]

A caliper wind back tool... do u have the type with a cross pattern?

 

[Nutkin]

http://cgi.ebay.co.uk/New-Draper-Br...ryZ30917QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

you need exact words for halfords as most of them are thick as poop.

 

[brad1]

if you can help me. my piston has the two triangle shape grooves either side

 

[BCM]

sure its got 2 lugs and 35mm end!

 

[brad1]

cheers for all you help guys, went to halfords and got one cost me 18.99
so just bought it
will now do tommorow

 

[Muttley]

Generally, rear disk brake calipers contain separate mechanisms for footbrake and handbrake. The handbrake mechanism is mechanical and self-adjusts as the pads wear by the piston climbing up a screwed rod. When you come to fit new pads, the pistons have to be screwed back down those rods. That's why you can't just press the pistons back in, like you can with the front caliper.

It's not the only way of making a rear disk brake/handbrake combination, but it is common.