Hello all! I'm Matt. I'm a Florida teen about to graduate high school and head off to aviation school in New York, where i plan on living. I regret the lack of introduction but I'm busy and in need of help.
I drive a 1990 Buick Riviera and I love this car... most days.
I've been working on cars since I was little and I would rate myself as an above-average mechanic. I have the occasional absent-mindedness bug that gets me into mechanical binds every now and then, but I'm generally able to think my way out of any situation and keep my old tank of a car on the road.
Anyway, my issue is with the rear brakes. This car was equipped with GM's earlier rear disc brake setups. Normally, they're lovely. But to work on their a pain. I feel that it's a rather awkward setup with the inbuilt parking brake and all. Drums for parking and discs for service braking is a much more intelligent setup.
I'm having trouble getting a good, solid adjustment on these brakes. I replaced these rear calipers forever ago. Unfortuantely, Cardone saw fit to NOT include the special adjusting instructions (and warning of the the fairly catastrophic consequences of improper adjustment) and never having dealt with this kind of rear braking system before I was unaware that they needed to be specially adjusted.
Now they're giving me trouble in the form of extra pedal travel. I managed to get one brake adjusted so that the parking brake level is only about 1/8th inch from the stop when the pads are tight. But the other is much worse. The lever rotates over half an inch from the stop before the brakes get tight. But the nut that the lever attaches to is only a hexagon nut, and the next position back is too far back and the lever won't even reach the stop. Cardone's ProTech bulletin had some information, but I think it was written by a drunk, it suggested using a screwdriver between the pad and the rotor to pry the piston back into the bore and then rotate the screw so that the lever adjusts correctly. But it said rotate it backwards... which tends to result in brake fluid leak if not careful... not liking this method. Meanwhile, carquest had a fairly well written bulletin that stated the brakes will correctly adjust if I pull the lever forward and then allow it to snap back a few times.
I'm going to continue repairs tomorrow as I have to work tonight. I'm really not so crazy about shoving a screwdriver between my pads and rotor as I prefer my pads and rotors "gouge free"
So what about the Carquest method. Will it work? Is there another method?
Any and all input is appreciated!