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Brake pad uneven fading

GEBRONI

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I just replaced my stock 4 pot calipers with 6 pots. I noticed in both 4 pot calipers the outboard brake pad is worn significantly more than the inboard brake pad. Anyone else experience this? If not then I am thinking brake master cylinder is the culprit :-(

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Norm Peterson

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Uneven pad wear can't be a master cylinder issue, as only one line supplies each caliper. I doubt anybody would be able to diagnose fade as being either inboard or outboard pad-specific.

It sounds like you have sticking or lazy caliper pistons, which would point to the calipers themselves or possibly the fluid crossover tubes. Fluid enters on the inboard side.


Norm
 
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GEBRONI

GEBRONI

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makes sense thanks; think the 4 pistons on base GT is poor design for the applications... One caliper looks like leaking from the seams and screws... They are two parts bolted together to make the caliper...uch happier with the 6 pots I installed ;-)
 

K4fxd

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There is nothing wrong with the 4 pot calipers. The problem is the rotors, they cool from the wrong side.

I have the 4 pots with 2 piece rotors and enjoy great braking with about a 30 pound weight saving over the 6 pots with stock rotors.

Like Norm said, the uneven wear is pointing to stuck pistons or improper installation of the pads. Did you use lube?
 
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GEBRONI

GEBRONI

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There is nothing wrong with the 4 pot calipers. The problem is the rotors, they cool from the wrong side.

I have the 4 pots with 2 piece rotors and enjoy great braking with about a 30 pound weight saving over the 6 pots with stock rotors.

Like Norm said, the uneven wear is pointing to stuck pistons or improper installation of the pads. Did you use lube?
I replaced them with the 6 pot calipers... One caliper I could see it was leaking from the seem in the middle and bolts as well... My car has 32k miles so never needed any brake maintenance on the 4 pots...
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