Stupid brake question

[gamma195]

I want to make sure my rear brakes are operating within their normal temperature range and that they are not dragging. I just checked and adjusted the parking brake, cleaned the pads/hardware, and lubed the slider pins.

Before i replace the calipers (for a stuck piston), could someone tell me what the rear brake disc and rear caliper temperature temps read after mild driving? I drove my H3 for about 15 minutes at about 25 mph with limited stops. Using a laser thermometer i am getting about 120-140 degrees on the rotors and pads. Both sides are similar. That seems high to me for but I may be wrong.

If any of you have a similar tool and could check your rear brakes and let me know your temps that would be great.

 

[alrock]

Without testing, I think that temperature is low. Rotors get very, very hot. I don't see a relationship between pad or rotor temperature and dragging. Dragging would be a result of a sticky caliper. If you're not smelling your brakes burning then your pads are not getting too hot.

 

[JPaul]

The rear brakes are really kind of small on the H3's, and from what I've found they apparently wear out sooner than the front's, which is opposite my past experience with vehicles. To be a bit over 120 degrees after a quarter hour of driving doesn't seem unrealistic for properly operating brakes.

 

[4speedfunk]

That’s nothing. Leave it be. A stuck piston will heat the entire corner to over 300F...wheel, hub, caliper, rotor, etc. It will glow at night and you will smell it cooking.