new pads/rotors, now car pulls left under braking Options

[mightyohm]

1972 car with S (aluminum) front calipers on 911T struts.

Installed new pads and rotors on the front to solve a steering vibration under hard braking (warped rotors). Had to remove the calipers to do this since the hard lines don't just unclip from the struts on this car.

Now when I stomp on the brakes, the car pulls left, enough that I need to correct for it or I make an unintended lane change. Most obvious on the highway, not really noticable on the city streets, except that the front left wheel locks first if I panic stop.

Bled brakes, no improvement. Also tried trading brake pads between the front calipers in case I somehow glazed or improperly broke in one side - no effect.

Other work done at the same time - pulled the top of the struts out from under the wheel well to tighten the big nut that holds the shock insert on. One was loose. Drove car after I did that and didn't notice any change in handling or brake performance.

Could I have damaged the brake lines somehow when I tightened the nuts on the shock inserts? Or is it more likely that one caliper is acting up for some reason? Maybe pushing the pistons back into the caliper has caused one to get stuck??

Going to try replacing the brake lines tomorrow, if that doesn't fix it I'm not sure what to try next short of tearing open the calipers. (IMG:style_emoticons/default/sad.gif)

[Eric_Shea]

Couple of things:

with S (aluminum) front calipers on 911T struts.

S-Calipers don't fit t-struts. (IMG:style_emoticons/default/wink.gif)

Took the halves apart

Aluminum S-Calipers are a single unit, the 1/2's don't separate.

Regardless, it sounds like they need to be rebuilt. One of my very first caliper rebuilds ended in the same result. I had to rebuild them again. Luckly they were for my car.

It would be good to know what the actual calipers are, easier to diagnose issues. S-Calipers always have piston problems.