Caliper rebuild

[mattg]

Hi All

I have bee to good oil and done a search but can't find the best way to get the pistons out of my D2 front calipers. The ruber seals are stuffed so I want to remove the pistons to see if they need replacing befor I order my seal kits. any help appreciated.
Cheers

Matt

[Mick_Marsh]

I've seen this done on rusty pistons and it works a treat.
- screw a grease nipple in the brake inlet of the caliper
- pump in grease from a grease gun
- when one piston starts to move, lock it with G clamp(s)
- when second piston starts to move stop pumping grease
- remove G clamp(s)
- remove second piston
- remove first piston
- remove grease nipple
- give pistons, calipers and pipes/tubes a really good clean to remove all traces of grease.

[bee utey]

Hi All

I have been to good oil and done a search but can't find the best way to get the pistons out of my D2 front calipers. The ruber seals are stuffed so I want to remove the pistons to see if they need replacing befor I order my seal kits. any help appreciated.
Cheers

Matt
Leave them connected, remove the pads, pump the pedal until the pistons move out far enough to see the sides exposed. Compressed air is often good to pop them out unless they are rusted in.

[abaddonxi]

Thanks folks, and into Good Oil.;)

[mattg]

Hi all

Worked it out with Compressed air got the pistons out, they look pretty good.

2 more questions.

what is the best way to clean the calipers, I have trited degreaser and brake parts cleaner. any ideas? ... petrol... Kero?

would the pistons work better If I polished them on the buffer or do they work better with the matt finish?

cheers

Matt.

[bee utey]

Hi all

Worked it out with Compressed air got the pistons out, they look pretty good.

2 more questions.

what is the best way to clean the calipers, I have trited degreaser and brake parts cleaner. any ideas? ... petrol... Kero?

would the pistons work better If I polished them on the buffer or do they work better with the matt finish?

cheers

Matt.
Soap and water, and a stiff brush. Works a treat and then just make sure its perfectly dry before refitting. Leave the matt finish as it allows brake fluid to lube the seals just enough.

[mattg]

Soap and water, and a stiff brush. Works a treat and then just make sure its perfectly dry before refitting. Leave the matt finish as it allows brake fluid to lube the seals just enough.

Thanks

I've given the it a go with the stiff brush and soap just hoping for a more solvent solution. I will be painting them once I get them clean, just need a clean surface to paint.

Cheers

Matt

[mattg]

All Done.

I found the best thing to clean them was McGuires Hot Rims cleaner. worked a treat then wire wheel in the drill.

Ended up going for the 4000 series DBA rotors with Braided lines from ROVA craft and EBC Green Stuff pads and a coat of 3M Caliper Paint. I recon they look the good, hears hoping they stop a good as they look.

Cheers

Matt

[Cannon]

oooh shiny:)

good work. i'll be up for rotors soon so i'm interested in how your set up performs

[mattg]

Not so fast.

Last thing I had to do at 2:30 this morning to get it ready to drive to Coffs today was bleed the brakes. Not a good time of day to discover that I buggered up one of the calipers and refitted the old seal and ripped it on the way in just for kicks. I have now bought another set of seals and will have another go. any tips on getting the Piston back in without catching the seal on the way in?

CHeers

Matt

[long stroke]

Gotta love the last minute rush:D
Once the seals are seated properly, a light smere of rubber greese or brake fluid should allow the piston to slide in easily, make sure when sliding the piston in that it is going in squarly, if it is slightly off it can jag the seal and you will have problams;)

CHEERS TIM.


Not so fast.

Last thing I had to do at 2:30 this morning to get it ready to drive to Coffs today was bleed the brakes. Not a good time of day to discover that I buggered up one of the calipers and refitted the old seal and ripped it on the way in just for kicks. I have now bought another set of seals and will have another go. any tips on getting the Piston back in without catching the seal on the way in?

CHeers

Matt

[mattg]

Well

Next instalment.

I have found out the hard way that the main seal has a tapper so you need to make sure firstly that your seal has the same tapper.

The first problem I had was that my first seal had the Taper but I put it in Upside down I then forced the piston in and ripped the seal. It Leaked...

Secondly I was sold another kit but try as I could T just could not get that piston in. Guess what no taper. I will try and get a Macro photo so you can see the difference.

Once I have worked it all up I will post some Picks.


Cheers

Matt

[mattg]

Hi again.

Found out Brit part seals can have a variance of half a mm. handy. not looking good for brit part again:o

[mattg]

WELL.

after all of that work on the calipers the drivers side has worn its pads to teh disc and the passenger hardly at all.

not happy Jan.

Anyone else had this problem.

before I jump up and down with the guy who got me the rebuild kits can the ABS do this or is it dodgy callipers.

cheers

Matt