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Well I knew my rear calipers were not providing much in the way of braking by looking at the size of the clean swept area of rotors. They looked orig with 160k miles so I decided to replace them. Got the rebuilts from eeuro (Nugeon brand purch 1.5 yrs ago and Nastra brand purch last month). They both looked good and had functioning allen head retraction devices.
Installation
After soaking where brake hose screws to caliper body liberally w/PB blaster it unscrewed ok - but required rotating the unbolted caliper so as not to overly stress the brake hose. Was worried about this and had new hoses at the ready - although the other end looked dangerously difficult to mess with.
Bleeding Tale of Woe
Then tried pressure bleeding calipers with MotiveBleeder at 20 psi and removed a few bubbles of air then just brake fluid. Result was poor pedal with it going slowly almost to floor, much lower than normal. Tried again without pressure and using old style pedal and bleedscrew coordination, same result. Then tried again with pressure and also switching on car and bypassing relay with jumper activating abs/booster pump for bout 20 sec while bleeding - same result. Then took it (drivable if careful) to a saab mechanic (BostnVolvo/CharlesRiverSaab) and he said need a new mastercylinder (est provided was MC part cost non-oem $600 and $400 to install) :-(. It seemed to make sense for an 18 year old car so I got an oem ATE replacemt from eeuro ($200!) and installed it - very straightforward install after battery tray removal. Note that it did not involve dealing with any other brake system component, just the 3 bolts holding the MC, the 2 hydraul lines, and 2 reservoir nipples. Result was same poor pedal with travel slowly to floor!! See next post for more.......
DanaH
97 9000CS, 5 spd, 160k miles
posted by 50.133.177...
, Tue, 1 Sep 2015 12:19:35
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