Delco-Moraine PowerMaster-3 ABS brake system maintenance
ABS system on Esprits has a bad rap, but do you remember when did you service it last time?
Brake fluid is hygroscopic and absorbs moisture from the air, even if not used. Anything higher than 2% water content asks for a change. 4% is not acceptable in our cars.
You should make it a habit to purge at least the pump and reservoir annually. Full bleeding job is recommended, if you want to have a well functioning system.
First, install Speed Bleeders at all 4 calipers. They make bleeding brakes one person job! http://speedbleeder.com/
Lift the rear and take the wheels off.
Siphon off old fluid from the reservoir and re-fill with Pentosin Super Dot 4
fresh fluid. Replace the cover tightly. Do NOT touch the brake pedal at this time.
Install a piece of translucent PVC hose over the Speed Bleeder nipple at the right rear caliper and keep the other end inside a small transparent
container to catch dirty fluid.
Turn on the ignition key and listen to the pump pressurizing the system. When it stops, turn off the ignition key.
! DO NOT touch the brake pedal, yet!
Get out of the car and open the Speed Bleeder valve by 1/2-3/4 turn.
Depress brake pedal 3 times all the way to the floor. White "milky" fluid will drain into container. That is your ABS pump fluid with suspended water droplets. Repeat until clean fluid starts coming out of the bleeder. Close tight the Speed bleeder.
Switch your attention to the left rear caliper and follow the same procedure.
WARNING: You can depress the pedal only 5-6 times without running out of fluid, so don't forget to replenish it periodically.
Add fluid to the reservoir and continue bleeding the front.
Repeat this procedure every 12-15 months.
Large 5 liter container of Pentosin Super Dot 4 at Advanced Auto Parts, Part # 1204204