Install an old brake pad as a buffer between the tool and the caliper piston(s). Using a large "C" clamp or channel locks move the piston(s) inward until fully retracted. If a brake caliper utilizes a parking brake mechanism, a caliper reset tool is needed.

Yes, we recommend adding one can of the PAG Oil A/C Stop Leak through the low side service port. After adding the PAG Oil you should then recharge the A/C system to its proper level.