"MR2_FTW - Group J's resident Stig" (MR2_FTW)
07/09/2015 at 10:10 • Filed to: DIY, TOYOTA, CRESSIDA, WAGON, BROWN, BRAKES
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"MR2_FTW - Group J's resident Stig" (MR2_FTW)
07/09/2015 at 10:10 • Filed to: DIY, TOYOTA, CRESSIDA, WAGON, BROWN, BRAKES | 7
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The rear brakes on my wagon have been squealing for a while now, and the right rear caliper was leaking fluid from the ebrake crank. Rather than bleeding the whole system twice I took the opportunity to gut the proportioning valve so the rear disc brakes can finally start doing their fair share of work, as the stock part was valved for having the old drums.
After doing this, the rear brakes were INSANELY loud. Like feeling the howling through the pedal, blow out your ear drums because of the resonance loud. I suspect this was due to the pads not bedding in properly from under-use from the prop valve. A new set of better quality pads and lubricated caliper slide pins later, and the car stops perfectly and silently.
The moral of this story: if you convert from rear drums to discs, make sure you adjust the proportioning to compensate, otherwise your fancy new rear brakes aren’t going to be doing much of anything at all.
MonkeePuzzle
> MR2_FTW - Group J's resident Stig
07/09/2015 at 10:49 |
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I gutted a shell to get the parts I wanted to upgrade my car, sent it off to the junkyard not knowing about proportioning valves :S I ran my disc rear brakes with the drum prop valve for longer than I’d like to admit before I was able to get the correct prop valve.
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MR2_FTW - Group J's resident Stig
> MonkeePuzzle
07/09/2015 at 10:53 |
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In a pinch you can just remove the plunger and spring from the stock valve, sending equal pressure everywhere. In my MR2 and the wagon it has worked great with no premature rear end lockup. But then again, both these vehicles have a lot of weight on the rear, I wouldn’t recommend it in a “regular” car.
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MonkeePuzzle
> MR2_FTW - Group J's resident Stig
07/09/2015 at 10:56 |
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yeah, it was a civic. best I could tell the valve/distribution block was not modifyable (thats not a word), but I was substantially more ignorant back then. Braking was... let’s call it interesting.
Street Surgeon
> MR2_FTW - Group J's resident Stig
07/09/2015 at 11:01 |
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Yep, happened to a buddy of mine that converted his 240Z to discs all around and it still stopped like poop. One proportioning valve later and all was well :)