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brake piston rewind tool

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Pastry
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brake piston rewind tool

Post by Pastry » Sat Mar 11, 2017 10:10 pm

I want to change the rear pads on my E89 but because of the electronic handbrake (poxy idea that was) you need a rewind tool for the piston? Has anyone bought a cheap one that worked on their E89 please?
991 Carrera 2S
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Smartbear
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brake piston rewind tool

Post by Smartbear » Sat Mar 11, 2017 10:16 pm

You don't need a tool, the motor part comes off & you can wind the Pistons back manually :thumbsup:
Rob
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Pastry
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brake piston rewind tool

Post by Pastry » Sat Mar 11, 2017 10:23 pm

Smartbear wrote:You don't need a tool, the motor part comes off & you can wind the Pistons back manually :thumbsup:
Rob
Are you sure Mr Bear, after taking the callipers of today Stu was sure you needed the tool?
991 Carrera 2S
Now gone:
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2006 Z4 3.0si sport Titanium Silver
2010 Z4 23i Msport and a 3.0i

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brake piston rewind tool

Post by Smartbear » Sat Mar 11, 2017 10:26 pm

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e89 Sdrive 20i, plenty of mumbo & good economy-the thinking bears z4
e89 Sdrive 30i, this ones busted, pass me another...
e85 3.0si sold

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cj10jeeper
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brake piston rewind tool

Post by cj10jeeper » Sat Mar 11, 2017 10:28 pm

I have this one and used it on countless different brake set ups
Even those that don't need to be rotated, but just compressed are easy with it

http://www.ebay.co.uk/itm/19pc-Brake-Ca ... Swm8VUrv76
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brake piston rewind tool

Post by Smartbear » Sat Mar 11, 2017 10:35 pm

cj10jeeper wrote:I have this one and used it on countless different brake set ups
Even those that don't need to be rotated, but just compressed are easy with it

http://www.ebay.co.uk/itm/19pc-Brake-Ca ... Swm8VUrv76
I believe the e89 rear calliper Pistons need winding in from the back of the calliper after the electric actuator has been removed :?
Rob
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e89 Sdrive 20i, plenty of mumbo & good economy-the thinking bears z4
e89 Sdrive 30i, this ones busted, pass me another...
e85 3.0si sold

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brake piston rewind tool

Post by Pastry » Sat Mar 11, 2017 10:46 pm

Smartbear wrote:
cj10jeeper wrote:I have this one and used it on countless different brake set ups
Even those that don't need to be rotated, but just compressed are easy with it

http://www.ebay.co.uk/itm/19pc-Brake-Ca ... Swm8VUrv76
I believe the e89 rear calliper Pistons need winding in from the back of the calliper after the electric actuator has been removed :?
Rob
Thanks Guys. I'll have a look at the video but either way it is still cost effective for me to change them myself, especially as the callipers are off waiting to be painted :thumbsup:
991 Carrera 2S
Now gone:
2008 Z4MR Midnight Blue Metallic
2006 Z4 3.0si sport Ruby Black
2006 Z4 3.0si sport Titanium Silver
2010 Z4 23i Msport and a 3.0i

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brake piston rewind tool

Post by firebobby » Sun Mar 12, 2017 2:41 pm

I use long nose pliers on the rear calipers on my MR2, just hold them against the piston and push/turn slowly. That's always worked for me.
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brake piston rewind tool

Post by flybobbie » Mon Mar 13, 2017 9:48 am

I wound my brakes from behind after removing ebrake mainly because I usually strip the whole lot clean repaint etc.
Always think there is the danger of tearing the dust seal if rotated from the piston face.

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brake piston rewind tool

Post by benv6 » Mon Mar 13, 2017 11:25 am

I have changed my rear pads few months ago and used that same video, you can use a screwdriver but I have used the tool mentioned in this thread (ebay one) and it makes it a lot easier. the screwdriver option would take you ages to push back the piston.
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brake piston rewind tool

Post by Nictrix » Mon Mar 13, 2017 11:30 am

Just to be completely clear on this for when it comes time to change ours, can you wind the piston in both ways?
Either with the e-brake part attached winding the piston or with it removed and winding from the rear?
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brake piston rewind tool

Post by Smartbear » Mon Mar 13, 2017 11:40 am

Nictrix wrote:Just to be completely clear on this for when it comes time to change ours, can you wind the piston in both ways?
Either with the e-brake part attached winding the piston or with it removed and winding from the rear?
I'd say yes, looks like Pastry has left the actuators attached & wound the Piston in from the front :thumbsup:
Rob
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e89 Sdrive 20i, plenty of mumbo & good economy-the thinking bears z4
e89 Sdrive 30i, this ones busted, pass me another...
e85 3.0si sold

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Pastry
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brake piston rewind tool

Post by Pastry » Mon Mar 13, 2017 12:12 pm

Smartbear wrote:
Nictrix wrote:Just to be completely clear on this for when it comes time to change ours, can you wind the piston in both ways?
Either with the e-brake part attached winding the piston or with it removed and winding from the rear?
I'd say yes, looks like Pastry has left the actuators attached & wound the Piston in from the front :thumbsup:
Rob
I used the method shown in the video using a large flat blade screwdriver. With hindsight I would have bought the tool as it's only a few pounds and would make the job a lot easier with much less chance of damaging something.
991 Carrera 2S
Now gone:
2008 Z4MR Midnight Blue Metallic
2006 Z4 3.0si sport Ruby Black
2006 Z4 3.0si sport Titanium Silver
2010 Z4 23i Msport and a 3.0i

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brake piston rewind tool

Post by cj10jeeper » Mon Mar 13, 2017 12:21 pm

Pastry wrote:
Smartbear wrote:
Nictrix wrote:Just to be completely clear on this for when it comes time to change ours, can you wind the piston in both ways?
Either with the e-brake part attached winding the piston or with it removed and winding from the rear?
I'd say yes, looks like Pastry has left the actuators attached & wound the Piston in from the front :thumbsup:
Rob
I used the method shown in the video using a large flat blade screwdriver. With hindsight I would have bought the tool as it's only a few pounds and would make the job a lot easier with much less chance of damaging something.
For this reason I always buy s tool. Used it in BMW, jeeps & Jags all with different set ups and so much better than messing with screwdrivers and g clamps
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brake piston rewind tool

Post by R.E92 » Mon Mar 20, 2017 2:49 pm

This should be possible with ISTA-D.

I have read somewhere else that there is a software procedure for releasing the ebrake.

EDIT: Found it. It's part of ISTA-D, under Vehicle Management >> Service Functions >> Chassis and suspension >> Parking Brake >> Worshop mode > "ABL - Parking brake: Workshop mode"

I think BMW use a special tool for manually retracting it now but before that tool came along they used the above method.

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