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Rear Brake Piston

stonking

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Hi All. I am changing the rear disc pads on my 58 plate saloon but the piston does not slide back in and there does not seem to be a way to wind it back in. Should it just push back because that is what I seem to remember. Oh, it is the offside if that makes any difference.

Thanks.
 

stellamon

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I used a g-clamp to push the piston in on mine, with the top off the brake fluid reservoir
 

stonking

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Hmmm, I seem to remember that is how I have done it in the past but it is not moving this time. I might open the bleed nipple a bit and see if it wants to come right.
 

stellamon

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Does the caliper have the handbrake fitted? Is it hollow or solid with slots in for winding?
 

Salim

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Just pushes back. May be seizing.
If it won't budge you can put a block in between that will allow the piston to come out a smidge (not enough to fall out) and gently pump the pedal to free the piston.

Look behind the boot to see if the pistons rusted. It may be time for a rebuild or new caliper
 

stellamon

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I agree with Salim, could be seized, common fault on these apparently. I used the brake pedal to force the piston out when I serviced the caliper on mine.
 

shadow2kn

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there's another way that part of being lazy I usually use on my 7th gen fronts, coz they're push back ones as well, and that is I put a spanner flat across the piston and then use the wind back tool without the winding bit at the end... and that works a treat..
 

stonking

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Thanks for all the advice. The car has done 230k so I guess another caliper for £40 would be a good investment really. Plus it is not a big job.
 
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