Compressing Rear allroad Brake Pistons
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Audiworld Junior Member
Joined: Aug 2007
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Compressing Rear allroad Brake Pistons
I have the calipers off - rotors turned - new ceramic pads and the tool to turn the piston. I have turned and turned (even using a power drill adapter) and the piston does not seem to compress.
Do I need to release some fluid pressure or something? Assistance greatly appreciated....
Do I need to release some fluid pressure or something? Assistance greatly appreciated....
AudiWorld Super User
Joined: Apr 2003
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From: Full-time Utah skier now
You need to push in while turning clockwise. In the bench I used to use a big C-clamp to apply pressure. If you have the proper tool, it applies the pressure. Helps to open the bleeder screw. Pix is of the type of piston rewind tool I use now.
AudiWorld Member
Joined: Aug 2004
Posts: 447
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From: Kansas City
MINI Coopers work the same way, and I have the same Harbor Freight tool as posted above ($20 on sale and worth every penny) and while it's a bit fiddly to use, it does the job perfectly.
Go get one....
Go get one....
AudiWorld Senior Member
Joined: Nov 2003
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Can't you just press the piston straight in using a c-clamp and block of wood?
From reading this, I get the impression the piston has a seal that twists like a jiffy pop popcorn as it expands.
Pardon my ignorance, just that I've never seen a piston that didn't push straight into the caliper.
From reading this, I get the impression the piston has a seal that twists like a jiffy pop popcorn as it expands.
Pardon my ignorance, just that I've never seen a piston that didn't push straight into the caliper.
AudiWorld Member
Joined: Aug 2004
Posts: 447
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From: Kansas City
Part no 15 is a screw that the piston rides on, it controls the em brake. Each time you pull the e-brake, if there's enough wear in the pad this screw ratchets out a bit. When you put new pads in you have to thread the piston back down this screw to it's starting place.
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Audiworld Junior Member
Joined: Aug 2007
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Got it done. Had one piston sticking - took a C clamp to it and when the clamp applied pressure, the piston turned.
Had to buy a piece of crap multi tool that goes on the end of a socket wrench as all the parts stores brake piston kits were out.
Will hit Harbor Freight when I get back to Vegas. Thanks for all the advice.
Had to buy a piece of crap multi tool that goes on the end of a socket wrench as all the parts stores brake piston kits were out.
Will hit Harbor Freight when I get back to Vegas. Thanks for all the advice.
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