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Old 09-30-2012, 10:41 PM
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Yorgi Yorgi is offline
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Location: Toronto
 
Join Date: Mar 2005
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Mein Auto: '04 M3 / '06 650i Cab
Quote:
Originally Posted by ansetou View Post
Hi there,
I need help!
How come I can't push the piston back, still see metal. I used a lever on the c ring and it doesn't seem to be moving a bit.
Thanks.
I agree with itscoo2pyopants, you should NOT push directly on the piston with the c-clamp. If you already have the caliper off the carrier (ie Image #18 in the DIY) then leave the old pad in the piston and tighten the clamp on the middle of the pad (see Image #20).

If you push on one side of the pad, or even worse push directly on the piston, the piston will rotate in the cup and jam. You can also scratch the face of the piston if you push directly on it which can lead to brake squeal.

If you are having trouble pushing in the piston even with a pad in place you can open up the brake fluid reservoir cap which will reduce the pressure required to push in the pad.
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