rear brake problem
#1
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rear brake problem
Today I replaced my front(4piston) and rear(single) pads. The rear brakes dont seem like they're working right though. With the car on jacks, foot on the brakes, the rear wheels turn easily.
Both pistons retracted fine, when I put the new pads in.
Could I need a piston rebuild kit for both calipers or could it be something else?
I bled the system with no problems and the pads are hawk hps.
Any input? thx.
Both pistons retracted fine, when I put the new pads in.
Could I need a piston rebuild kit for both calipers or could it be something else?
I bled the system with no problems and the pads are hawk hps.
Any input? thx.
#2
How about a little more information? Is the 4-piston system a retrofit or an original configuration? If a retrofit, did you also replace the rear calipers with the ones that match the front 4-piston calipers? When you rotated the rear caliper pistons back into the bores did you align the "V-shaped" notches on the pistons as instructed in the manual before installing the new pads.?
Almost sounds like a master cylinder, proportioning valve or brake line obstruction problem. But if you got a good flow of fluid when you bled the rear brakes that seems unlikely. Have you messed with the master cylinder or proportioning valves at all?
Almost sounds like a master cylinder, proportioning valve or brake line obstruction problem. But if you got a good flow of fluid when you bled the rear brakes that seems unlikely. Have you messed with the master cylinder or proportioning valves at all?
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Originally Posted by juice22
Today I replaced my front(4piston) and rear(single) pads. The rear brakes dont seem like they're working right though. With the car on jacks, foot on the brakes, the rear wheels turn easily.
Both pistons retracted fine, when I put the new pads in.
Could I need a piston rebuild kit for both calipers or could it be something else?
I bled the system with no problems and the pads are hawk hps.
Any input? thx.
Both pistons retracted fine, when I put the new pads in.
Could I need a piston rebuild kit for both calipers or could it be something else?
I bled the system with no problems and the pads are hawk hps.
Any input? thx.
#6
Originally Posted by Houpty GT
When the car is up on a lift or jacks the rear suspension is all the extended and the proportioning valve is going to react differently.
How would the proportioning valve know when the suspension is extended or compressed?
#7
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You did make sure the pads were seated first right? It takes a couple pumps to get it all tight again. Other than that if you need a rebuilt caliper it'll be leaking fluid. If there's fluid where it's not supposed to be then rebuild, if not the problem is likely elsewhere.
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#8
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I bled the rears again friday night. I opened the lower bleeding screws this time, everything is good now. I never took the calipers off though, the FSM states you only need to bleed the lower valves if you disassemble the caliper.
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