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au11 new pads over heat brakes 

 

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 Post subject: au11 new pads over heat brakes
Posted: Wed Aug 01, 2012 6:01 pm 
Oompa Loompa
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Age: 31

Posts: 46

Joined: 31st Jul 2012

Ride: ford au11

Location: bairnsdale
VIC, Australia

hey,
My au11 sr is having probs when i replace the brake pads. I get preped remove my cap for brake resivor and place a flat block of wood on the brake pistons, use a g clamp to push them back, fit new pads. But every time i have done so 3 times now the brakes seem to stick or not release and over heat. I bought 2 dif pad brands, bendix n some cheap s**t n makes no difference. I bleed my brakes properly, and even checked the rotor diameters and its all flush. I Regreased my calliper slides and it helped till i drove about 10 kms then My ABS light on dash lit up and i stopped, sure enough my brakes were red hot.

Any help plz?
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 Post subject: Re: au11 new pads over heat brakes
Posted: Wed Aug 01, 2012 9:22 pm 
Getting Side Ways
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Ride: EF-XR8chaser

Location: wollongong
NSW, Australia

metal-mania wrote:
hey,
My au11 sr is having probs when i replace the brake pads. I get preped remove my cap for brake resivor and place a flat block of wood on the brake pistons, use a g clamp to push them back, fit new pads. But every time i have done so 3 times now the brakes seem to stick or not release and over heat. I bought 2 dif pad brands, bendix n some cheap s**t n makes no difference. I bleed my brakes properly, and even checked the rotor diameters and its all flush. I Regreased my calliper slides and it helped till i drove about 10 kms then My ABS light on dash lit up and i stopped, sure enough my brakes were red hot.

Any help plz?

how tight was the g clamp pushing the pistons back?pistons may be stuck and not springing back when the pressure is released.

 

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 Post subject: Re: au11 new pads over heat brakes
Posted: Thu Aug 02, 2012 5:47 pm 
Getting Side Ways
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The pistons are tight. need a rebuild.

 

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 Post subject: Re: au11 new pads over heat brakes
Posted: Fri Aug 03, 2012 1:47 am 
Getting Side Ways
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Age: 49

Posts: 6467

Joined: 18th Dec 2006

Ride: 93 ED sedan

Power: 161 rwkw

Location: Rockhampton
QLD, Australia

AU2's have Phenolic caliper pistons...you'll need a rebuild by the sounds of it.

 

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 Post subject: Re: au11 new pads over heat brakes
Posted: Fri Aug 03, 2012 7:52 am 
Getting Side Ways
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Ride: EF XR6 Wagon, AU2 XR6 VCT

Power: 148 rwkw

Location: Auckland
New Zealand

Piston seized in the caliper for sure. Had the same once on my EF.

 

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 Post subject: Re: au11 new pads over heat brakes
Posted: Fri Aug 03, 2012 4:39 pm 
Oompa Loompa
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Age: 31

Posts: 46

Joined: 31st Jul 2012

Ride: ford au11

Location: bairnsdale
VIC, Australia

the pistons went in smooth. It just seem that once i put the pads in, i pump the brake they just stay on. I have to keep putting my old pads back on. They work fine with the old pads.
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 Post subject: Re: au11 new pads over heat brakes
Posted: Fri Aug 03, 2012 7:47 pm 
Getting Side Ways
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Age: 49

Posts: 6467

Joined: 18th Dec 2006

Ride: 93 ED sedan

Power: 161 rwkw

Location: Rockhampton
QLD, Australia

Crud builds up behind the pistons in the caliper, hence why I change the brake fluid the way I do.
I use a vacuum brake bleeder......suck out the old fluid from the reservoir, clean out the crud there if possible and refill with new fluid, clamp off the brake hose, remove and clear the bleeder nipple, put Antisieze compound on the thread of the bleeder nipple, refit, and put the vacuum bleeder on the nipple, crack the bleeder open anmd suck out the fliud till clean stuff comes through.
Then reclamp the hose, and help the piston/s go back in, then undo the clamp till clear again.
Do this on all 4 calipers.
Remember to keep an eye on the reservoir fluid level.
Fit new pads if required, check the caliper slides are free.
then pump out the pads with engine running, BUT, only pump it anout 1/4 to 1/3 the pedal travel.....
DO NOT PUMP IT TO THE FLOOR.
A brake master cylinder really only wears the first 1/4 to 1/3 of the cylinder.....pumping it past this point can be detremental to the master cylinder.

 

 

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 Post subject: Re: au11 new pads over heat brakes
Posted: Sun Aug 05, 2012 5:31 pm 
Oompa Loompa
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Age: 31

Posts: 46

Joined: 31st Jul 2012

Ride: ford au11

Location: bairnsdale
VIC, Australia

thanks heaps for the tips and the pics mate. ill give it a go, will keep posted.
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 Post subject: Re: au11 new pads over heat brakes
Posted: Thu Aug 09, 2012 3:19 pm 
Oompa Loompa
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Age: 31

Posts: 46

Joined: 31st Jul 2012

Ride: ford au11

Location: bairnsdale
VIC, Australia

It tried as stated above, there was minimal sludge build up. There was a difference but the brakes still stick on after a short drive. I thought maybe uneven wear on the rotors but they are flush and smooth.
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