MR2 Rear Brake Rotors/Pads
Just some quick notes and pictures on removing the rear brake rotors
and pads on a 1991 MR2 Turbo. Start off by raising the rear of
the car, and removing the rear wheels.
Remove the caliper bolt, and the two bolts holding the 'rotor bracket' in
place. Rotor bracket:
caliper can be help up with a string.
The rear rotor can now be removed. It's best to use a 10mm bolt to
pull the rotor off (ie it's not necessary to beat on the rotor with a hammer). Such
a bolt is common on the MR2. The bolt holes are located in two places on
the rotor, but only one is necessary to use.
One of the rotors had some bad scratching from a strangely worn pad.
New rotor installed (so clean!).
The piston now has to be twisted back in to install new pads. For some
reason, on my MR2, this is somewhat difficult. In the past, I've been able
to do it with needle nose pliers, but this time it seemed even more tight. I
found a nice tool at the local auto parts store (Fairfax Auto Parts) that made
the job much easier.
Using this tool, the piston can be pushed back in. I found it easiest
with the caliper put back on (ie not tied up). The piston can be seen in
the following picture.
I use some molybdenum grease on the shims and slots on the brake pad.
The brakes can then be bled starting from the furthest caliper from the master
cylinder (passenger side rear). I use a tube, a cup full of fluid, and
the 'wife brake pump'. With the bleed valve closed, I ask the 'wife brake
pump' to pump the brake a few times. Then with her holding some pressure
on the pedal, I open the bleed valve. It's best not to have the brake pedal
go all the way to the floor - so before that happens I close the bleed valve. I
do this about 10-15 times per wheel.