Drove my car for about an hour today and noticed the left wheel getting warm. Just rebuilt the front brakes last weekend and found the rotor on that side was warped when I had it turned. One of the reasons I pulled over to check it. Must have meant it was getting hot before I rebuilt the brakes. I checked the bearings and they were fine. All new brake parts, including new pistons. I did have to put in three shims on the left side to center the caliper. I am baffled. Any suggestions?