A little off subject but I'll ask anyway. Need to change the disc pads on a Cavalier. Read somewhere that simply pushing the calipers back with a c-clamp is not recommended on the ABS system. What do I need to do to get the calipers back far enough to load the new pads?
EDIT
Believe that I need to open the bleeders instead of pushing the fluid back into the system. Sound correct?

John, ideally you should open the bleeder and then push the piston back so all the crap that accumulates in the caliper doesn't get forced back through the lines and the ABS system (I have never done it that in the thousands of ABS brakes I have done), thats the "
right"way anyways. Remember tho bleed the brakes afterward.

Thanks, thought I remembered something about an extra step. Makes some sense but I wouldn't think the volume of the fluid that's pushed back would reach up to the master/module. I guess since it's my car and I don't want to chance screwing up the other components, I'll bleed the fluid into my bleeder jar. Fluid is cheap and have other cars to drive if it takes a bit longer to do.

...but I wouldn't think the volume of the fluid that's pushed back would reach up to the master/module....
I dunno John, if you compare the area of the caliper piston versus the area of the brake line you might see things backing up a lot further than you thought.

If I randomly use a 1" caliper piston and a 1/8" ID brake line I get about a 64:1 ratio. So 1/16" on the caliper would give 4" of fluid movement. Not to the master yet, but your piston is probably bigger and your line may be smaller. If the piston size is increased to 1.25" it jumps to 100:1.

Isn't hydraulic leverage fun? :)

I dunno John, if you compare the area of the caliper piston versus the area of the brake line you might see things backing up a lot further than you thought.

If I randomly use a 1" caliper piston and a 1/8" ID brake line I get about a 64:1 ratio. So 1/16" on the caliper would give 4" of fluid movement. Not to the master yet, but your piston is probably bigger and your line may be smaller. If the piston size is increased to 1.25" it jumps to 100:1.

Isn't hydraulic leverage fun? :)
Yeah, it's kinda neat to play with though I call it hydraulic multiplication. I've tried to explain to a friend of mine that my log splitter takes 24 oz of oil in the engine but need 5 gallons of hydraulic oil to run the ram. I've given up.
BTW
Thanks all. Finished the fronts last night. I'll nose around later to see what the rears look like. In the meantime the car is back on the road.