First, get a torque wrench and insure that all wheel nuts are to the proper spec.
This is a just in case cause it sounds like there have been a number of opportunities for someone to screw that up since the factory.
Now that one of the major reasons for rotor warpage is eliminated, lets continue. But if warpage has already occured that might be a separate issue.
I had an issue with rt frt with less than 5K miles. It only happened once so far but it does not inspire confidence. The caliper stuck while applying brake. Not the piston, but the slide. Consequently, pad was only being applied to one side of rotor and forcing it out of shape and causing the feeling of warped rotor.
Since this has been going on for a little while, more heat on one side seems to indicate something along the same issue. They may be checking for a stuck piston when it is the slide that is sticking and causing just one pad to drag.
Perhaps carefully measuring the remaining pad, comparing inside one to the outside one will show a difference in wear. And then compare left side outside pad to the one on the right and the same for inside pads.
Also look for discoloration of rotor, both sides of it. Blueing is evidence of overheat caused by drag.
Often if a caliper is sticking, you might feel a pull to one side, but the severity can range from almost imperceptible to more severe. It often is more perceptible from a standing start if real mild and in your case it almost sounds like you have to wait for the rotor to expand from heat.
This is a just in case cause it sounds like there have been a number of opportunities for someone to screw that up since the factory.
Now that one of the major reasons for rotor warpage is eliminated, lets continue. But if warpage has already occured that might be a separate issue.
I had an issue with rt frt with less than 5K miles. It only happened once so far but it does not inspire confidence. The caliper stuck while applying brake. Not the piston, but the slide. Consequently, pad was only being applied to one side of rotor and forcing it out of shape and causing the feeling of warped rotor.
Since this has been going on for a little while, more heat on one side seems to indicate something along the same issue. They may be checking for a stuck piston when it is the slide that is sticking and causing just one pad to drag.
Perhaps carefully measuring the remaining pad, comparing inside one to the outside one will show a difference in wear. And then compare left side outside pad to the one on the right and the same for inside pads.
Also look for discoloration of rotor, both sides of it. Blueing is evidence of overheat caused by drag.
Often if a caliper is sticking, you might feel a pull to one side, but the severity can range from almost imperceptible to more severe. It often is more perceptible from a standing start if real mild and in your case it almost sounds like you have to wait for the rotor to expand from heat.
