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01-11-2015, 04:05 PM
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Starter Motor
Join Date: Feb 2014
Posts: 2
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Hi Guys,
I own a AU 1 1999 xr8 manual and have used this site to upgrade my front brakes to series 3 which worked out fine. 8 months ago i stopped using the vehicle over winter last Friday i took the old girl in for a warrant and failed with the right front caliper jamming on. I went back home pulled the caliper apart found 1 pot was seized so i replaced the caliper with one that i had pulled apart cleaned up and all parts are easy moving. Fitted back on the car bleed the brakes and you could see the brake pads moving and locking on to the rotor and not releasing. I have checked the line for kinks and the hose for squashed points but all is good and changed the brake fluid. Also went to the extreme of changing the ABS unit thinking maybe a valve was not releasing when your foot was released. I changed brake pads thinking they may have been too big. i have to push the pistons in the caliper back in with a G clamp even with the bleed nipple released. while doing all these changes the passenger side works fine every time. Im thinking its something easy that i have missed, can you guys please give me a new direction to try. I was thinking brake booster and master cylinder but its only 1 caliper playing up not all or fronts or backs. Problem is when i pressurize the brakes the driver front does not release Thanks in Advance |
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01-11-2015, 07:56 PM
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Au Falcon = Mr Reliable
Join Date: Sep 2009
Location: North West Slopes & Plains NSW
Posts: 4,076
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Hi mate & welcome to AFF! Sticky piston perhaps not fully releasing is my guess? Did you use a lube in the reassembly process? Either grab another second hand caliper to test then / or rebuild the ones you've got. Good luck!
cheer's, Maka
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Ford AU Series Magazine Scans Here - www.fordforums.com.au/photos/index.php?cat=2792 Proud owner of a optioned keeper S1 Tickford Falcon AU XR6 VCT - "it's actually a better-balanced car than the XR8, goes almost as hard and uses about two-thirds of the fuel" (Drive.com 2007) |
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01-11-2015, 09:50 PM
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Next upgraded Mk1 Leopard
  
Join Date: Jan 2005
Location: Sydney, in the burbs
Posts: 4,903
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quick trip to a wreckers I reckon
UK
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Plastic Surgery 1 AUII Monsoon Blue How 2's: Change rear view mirror, Install backfire valve, Change foam front seats, Install auto transmission cooler, Replace Trans Shift Globe, Remove front door Trim, Paint AU headlights, install door spears, Premium Rear Parcel Shelf, go here...
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02-11-2015, 12:03 AM
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You can't stop the signal
Join Date: Nov 2005
Location: Behind a computer at work
Posts: 1,624
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Check all four calipers.
If only 1 is doing it, then it points to that caliper. All 4 doing it, then it points to the master cylinder. You haven't changed master or booster?
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09-11-2015, 06:39 PM
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Starter Motor
Join Date: Feb 2014
Posts: 2
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thanks guys for the help and ideas.
I rang the local brake specialists and they told me the pistons are made of a ceramic type and warp over time so i replaced them with steel pistons and problem solved i will be doing the side this week to make them the same |
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1999 AU1 with Au111 brakes
Re: 1999 AU1 with Au111 brakes
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