Brake master causing brake drag in an LS?

[mkeith]

I'm working on a 95 LS in which all 4 brakes are dragging. It already has fresh DOT 4 fluid & new flex hoses all around. I'm going to replace the rear calipers as the pistons are difficult to retract even though I have a tool for the job, & I have the bleeder screw loose when retracting them.

However, the fronts are dragging as well, but the pistons on the fronts retract easily.

I know that on the 12V cars, the brake master would almost certainly be the culprit. However, I need to know whether or not the same holds true for the 24V cars. I haven't seen mention of this problem specific to a 24V car, & the 24V has a different brake master. Also, considering the price of a 24V master/booster combo, I want to be darn sure I'm right before I spend the money.

[Alfisto Steve]

Quote:

Originally Posted by mkeith I'm working on a 95 LS in which all 4 brakes are dragging. It already has fresh DOT 4 fluid & new flex hoses all around. I'm going to replace the rear calipers as the pistons are difficult to retract even though I have a tool for the job, & I have the bleeder screw loose when retracting them. However, the fronts are dragging as well, but the pistons on the fronts retract easily. I know that on the 12V cars, the brake master would almost certainly be the culprit. However, I need to know whether or not the same holds true for the 24V cars. I haven't seen mention of this problem specific to a 24V car, & the 24V has a different brake master. Also, considering the price of a 24V master/booster combo, I want to be darn sure I'm right before I spend the money.

[Alfissimo Int.]

Quote:

Originally Posted by Alfisto Steve Wish I could give you some sage advise here. Surely there must be a master or kit available without booster for 24v models but I don't know number(s). My rescue project 93 appears to be close to this state and even 91-93 there is no kit listed for master. Think Alfa lawyers and bean counters got to involved in 164 spare part process.

[treborblack]

Quote:

Originally Posted by Alfissimo Int. Master cylinder. No kits or anything for this, has to replace the whole unit. I am looking into only Brake masters from a aftermarket source in Italy

[elite38868]

You do know that you must rotate the rear caliper and at the same time push the piston in?

Sounds to me like the master cylinder is gone.

[mkeith]

Quote:

Originally Posted by elite38868 You do know that you must rotate the rear caliper and at the same time push the piston in?