1994-2002 [Subscribe to Daily Digest] |
Brake squeal from SAABs comes for several conditions, some good, some bad.
My 97 SET did not come from factory with wear indicators on pads, but factory replacement pads did have wear indicators. These are metal fingers that contact the disk all the time when pads are near to worn out. They make a very loud squeal that goes away when brakes are applied. Obviously pads should be replaced at this point.
Disk brakes don't require adjustment. The pads are in light but constant contact with the disk and adjust themselves for wear each time brake pedal is pushed. Squeal can be the vibration of the pad resulting from that contact. A sure fix is to "glue" the pad to the brake piston with the proper (ask at parts store) silicone seal. This will damp out the vibration. I've found that it goes away after a few weeks of using new pads. You should bed in your new pads with several very hard stops and then an extended cooldown w/o use of brakes. (interstate at night is a good place for this.)
I've also found that not resurfacing the rotors when changing pads avoids squeal problem. There is no need to turn rotors unless: you have constant pulsation in brake pedal,you have scoring near the depth of 1/16 of an inch. Turning rotors introduces runout and thickness variations if equipment isn't properly used or in good condition.
Saab emergency brakes are frequent cause of squeal. Internal return springs aren't good and adjustment must be tight to get them to give enough holding force. Lubing cable and cleaning and lubing all pivot points helps but requires removal of rear calipers and disks. Pulling and releasing brake handle several times usually cures for week or so.
posted by 208.154.1...
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