chenxingha

The rear-left brake calipe on my 2000 Lexus RX300 is frozen with the sliding pin. I have the caliper/mounting bracket assemly removed from the vehicle. The piston and the sliding machenism (using a bolt) on the other end are in good working condition.

The AutoZone.com has the sliding pin & bolt kit listed for less than $4. But I first need to separate the caliper from the sliding pin. I soked the open hole (after the rubber cap is removed) with W-4 and let it sit for a couple of hours. Still the caliper doesn't slide/move.

Any suggestions?

carguy07

Are you able to get the caliper to pivot up?

chenxingha

Basically, no. Use a screw driver to hedge it and could get about 2-3 degree of movement. I think this movement is between the screwed-in pivot pin and the mounting bracket. The caliper and the pin are frozen together.

Followup: finally, I used a hammer aided with a 4" long steel pin and knocked the mounting bracket in the area at the pivot pin's base. Slowly, knock by knock, the pin started to move from the caliper.

After the pin/mounting bracket is completely separated from the caliper, I can see some solid black spots on the pin's surface. In the caliper's hole, somewhere in the middle there are several rusty spots. I used solution and fine sand paper to clean them off.

The rubber boot and cap seem to be very tight. Mopisture somehow got to the inside any ways. The solid black spots are the hardened lubricants, I guess.

After cleaning, put new (green) synthetic lubricant and the caliper moves freely.