Quote:
Originally Posted by 2002_thundercloud
Two years ago I did a tundra 231 rotor and caliper upgrade and used good stuff. I have fully bled the system at least three times and still, to get good pedal feel, have to give the pedal a light pre-pump before the pedal feels "just right". I don't buy into the caliper fluid volume difference argument I read somewhere because the piston diameter between the 4Runner and tundra calipers is the same and the diameter of the pistons and their travel during brake application is what accounts for fluid volume, right?.... Think about it for a second...The caliper switch should have no impact on pedal travel.
I believe some air has made its way up to a coupler between the MC and calipers and will not flush out down to the calipers using the old fashioned pedal bleed method OR some air has made its way up to the ABS VSC solenoid area and again, the old fashioned pedal bleed method can't remove it.
Now that you have read that, let me reiterate....VERY Consistently, a light quick primer pump of the pedal produces a PERFECT feeling brake pedal. Without that little primer, the pedal is awkward with very little feedback, as if the rears are working harder than the front.
I asked my local Toyota dealer to bleed them per the TSM and the service manager said they "don't do that" and offered no other help.
So the question: can the clever garage mechanic perform a similar bleed procedure where the ABS / VSC solenoids are activated so that air is pushed to and out of the caliper without expensive Toyota tools?
Thanks,
Todd
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adjust the rear brakes properly.
if you have air in the system, it will never pump up solid. it might bring the pedal up higher, but the pedal will still be spongy.
what you are describing, sounds like rear drum brakes being out of adjustment.
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1985 pickup
: EFI 331/4r70W-Dana 300-42 TSL SXII's/raceline beadlocks-30spl longs-5.29's-spools-sky Hi steer-OBA/4g tank-10.5k RR winch-dual blue tops-200 amp alt-flatbed.
1985 4runner sr5
: 22RE/5spd-6" pro-comp suspension-37 BFG at's-5.29 gears-Badlands Basher bumper-8.5k RR winch.
2006 4runner v8 limited
: stock.
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