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Tom Richards
Goo Roo
nsw
V8

Posts: 1990
Reg: 08-2005

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Friday, November 07, 2014 - 06:23 pm, by:  Tom Richards (Tomr) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

my front brakes are "dragging" after use. I had a spare pr of pads and have fitted them and then bled all 4 wheels. Fronts are still dragging, Mainly LHS.

It is like the piston is jamming and not retracting fully. Apart from the piston actually jamming, can anything else cause this problem?

How do you remove the pistons?
Robert Day
DieHard
Victoria
V8 & 1J VVTI

Posts: 840
Reg: 01-2007

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Friday, November 07, 2014 - 07:09 pm, by:  Robert Day (Lexsmaz) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I would say more than likely its the calliper slides which are jammed / gummed up and are causing the dragging ..

When you put in the new pads did the calliper pistons push back in fairly easily especially the LHS side as you said that's the one dragging & if so again it points to the slide pins ..
Tom Richards
Goo Roo
nsw
V8

Posts: 1991
Reg: 08-2005

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Friday, November 07, 2014 - 10:51 pm, by:  Tom Richards (Tomr) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

doing some research, i have come across "residual pressure valve" as a possible culprit.

Any thoughts on this? Where is it located?
Scott Vim
Goo Roo
Vic
Soarer (1uz) Chaser (1jz)

Posts: 1169
Reg: 12-2010

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Friday, November 07, 2014 - 11:10 pm, by:  Scott Vim (1uz1jz) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Tom I had this exact same issue. The mechanic at the time told me he would send off the caliper for rebuild. $350+ and car off the road for whatever amount of time. I just bought front and rear TT brakes for about $150 for both and never looked back. Gained braking power as well.
Scott Vim
Goo Roo
Vic
Soarer (1uz) Chaser (1jz)

Posts: 1170
Reg: 12-2010

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Friday, November 07, 2014 - 11:24 pm, by:  Scott Vim (1uz1jz) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

It was my name passenger side too. Drivers side was fine. Not worth spending any money on them.
Nathan Sheehan
TryHard
Victoria
Soarer TT Manual

Posts: 347
Reg: 12-2005

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Saturday, November 08, 2014 - 07:17 am, by:  Nathan Sheehan (Soarermad1) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

spare pads are new or secondhand?
Tom Richards
Goo Roo
nsw
V8

Posts: 1992
Reg: 08-2005

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Saturday, November 08, 2014 - 09:06 am, by:  Tom Richards (Tomr) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

spare pads were off my sons car. the drag now is just a slight noise, but it doesnt stop the car rolling. I will let them "bed" in a couple of days and see how they go.

i checked the slides and they were ok.
Tom Richards
Goo Roo
nsw
V8

Posts: 1993
Reg: 08-2005

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Saturday, November 08, 2014 - 10:43 am, by:  Tom Richards (Tomr) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

found the noise. 1 of the backing plates had fallen off the inside pad when i removed it and lodged between the rotor and the "guard". When i put the new pads on i looked for the 2nd plate, couldnt see it on the ground and assumed it only had the 1 fitted. No noises and appears normal now. A closer inspection of the removed pads has shown a crack between the actual pad and the metal bracket. (IE the bonding of the pad was breaking)

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