Brake Piston Wind-Back Tool

MetzgerMeister · 07-09-2010 2:33pm #1

Hi all,

As per the title, anyone know where you can buy this tool?

Stevie Dakota · 07-09-2010 2:37pm

You can use a large G-clamp, placing the clamp against the old pad, not the piston itself.

listermint · 07-09-2010 2:38pm

As above this is just as easy, and you can use it for other work also.

MetzgerMeister · 07-09-2010 2:38pm

Thanks for taht but I've done that before. I want the proper tool for the job

kildare.17hmr · 07-09-2010 2:40pm

any good motor factors or halfords, if not a kit make sure you get both sides as they are differant

MetzgerMeister · 07-09-2010 2:44pm

kildare.17hmr wrote: »

any good motor factors or halfords, if not a kit make sure you get both sides as they are differant

You mean front and back?

kildare.17hmr · 07-09-2010 2:47pm

einheisserschre wrote: »

You mean front and back?

na left and right

mullingar · 07-09-2010 2:49pm

Fleabay:

http://cgi.ebay.ie/BERGEN-LEFT-HAND-BRAKE-CALIPER-PISTON-WIND-BACK-TOOL-/150482638147?pt=UK_Hand_Tools_Equipment&hash=item230976d543#ht_500wt_928

BrianD3 · 07-09-2010 2:50pm

What car is it. Some cars require an anticlockwise rewinder for one side and a clockwise one for the other. You'll also need the right adaptor for the piston face on your car. The rewinders costing around 25-30 euro (available in halfords) have 1 or 2 adaptors included while the kits costing 60-150 quid can have 20 or more adaptors.

kildare.17hmr · 07-09-2010 2:51pm

Depending on your car right might do, some cars have oppisate threads in piston. good to have both tho!

jame5_b · 07-09-2010 2:53pm

Halfords do them . have a look at the link

http://www.halfords.ie/webapp/wcs/stores/servlet/product_storeId_11101_catalogId_15551_productId_214227_langId_-1_categoryId_212616

MetzgerMeister · 07-09-2010 2:53pm

It's a Mazda RX8 and the pistons have "V"s cut out of them so I'm thinking that the tool fits into these cut outs.

These could also be for something to do with alignment and a metal part that comes off the rear pads for the handbrake.

shamwari · 07-09-2010 2:55pm

Stevie Dakota wrote: »

You can use a large G-clamp, placing the clamp against the old pad, not the piston itself.

If its ABS, does it have to be wounds back - no?

I don't often do many brakes nowadays, but I had cause to swap out a caliper on an ABS-braked Mitsubishi a while back. The piston was locked solid in the extended position and wouldn't compress back into the caliper body with a G clamp or a plumbers wrench. I had to borrow a wind-back tool something like this. The two "nipples" on the face of the tool lined up with two dimples in the face of the piston, and back she went when I started winding!

BrianD3 · 07-09-2010 3:05pm

einheisserschre wrote: »

It's a Mazda RX8 and the pistons have "V"s cut out of them so I'm thinking that the tool fits into these cut outs.

Yes, it sounds like the rewinder adaptor fits into those cut outs. I would say it's unlikely that the "standard" adaptors will fit a RX8. You will probably have to buy a separate one or a kit that includes the right one. But if you buy a kit without knowing exactly what's in it, there's no guarantee that you'll get the right one in it. :mad:

This question would probably be better suited to a forum specifically for RX8s.

MetzgerMeister · 07-09-2010 6:07pm

Thank you all for your replies.

I asked in our local Air Impact and they have several different sets for sale.

I'm not going to invest in anything just yet until I can find someone whom has bought one of these sets and ask if I can try it out.

Thanks again,

Dave

GTE · 07-09-2010 8:18pm

Presuming that the G clamp way doesn't do any damage or raise the risk of damage why is this tool needed if you could do it using the G Clamp and the old pad?

mickdw · 07-09-2010 8:25pm

If this car requires the piston being wound back in, dont under any circumstances use a g clamp to force straight back in.

MetzgerMeister · 08-09-2010 9:58am

mickdw wrote: »

If this car requires the piston being wound back in, dont under any circumstances use a g clamp to force straight back in.

Good point! You'll only damage the whole thing. I've also learned that you can use a needlenose pliers to do the job

mickdw · 08-09-2010 11:16am

einheisserschre wrote: »

Good point! You'll only damage the whole thing. I've also learned that you can use a needlenose pliers to do the job

Ive use a pliers too to twist them back. Ive seen some cars too that need twisting with alittle inward pressure applied too. These are a nightmare without proper tools

stevenmu · 08-09-2010 11:20am

I did my 8 recently and *cough*used the tyre iron*cough*, with the cap off the brake fluid reservoir it took very little force, I'm pretty sure though my pistons didn't have the V groove. I think yours is JDM though right, so that could be the difference.

dr.fuzzenstein · 08-09-2010 11:37am

mickdw wrote: »

Ive use a pliers too to twist them back. Ive seen some cars too that need twisting with alittle inward pressure applied too. These are a nightmare without proper tools

On the MX5 the rear brake pistons have to be pushed and turned at the same time and the piston doesn't have a groove, aaargh!
The last time I applied pressure with a clamp while my mate turned the piston with a wrench, it's a 2 man job and at that it's difficult.
Dreading next time already.

Brake Piston Wind-Back Tool

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