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Best sensor scheme for hot brakes?

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Conrad Hoffman:
A fair question.  ;D Manual transmission and , no,  I don't ride the brakes or do anything odd. IMO, the problem is climate and design. We have a long wet season, winters with a lot of salt and I park on a stone/dirt driveway that's likely humid much of the time. Design-wise, I know there's an issue with the pad-to-frame clearance and even if the piston doesn't seize up, the pads can get very tight in the caliper frame. Some people have had problems with the calipers seizing on the pins they slide on, but I think I've avoided that.  I've had the problem on the last two cars I've owned (Mazda3 and Hyundai Accent) and replacing calipers (and everything else brake related) has been a major expense when they get beyond 60,000 miles. General wisdom seems to be to service the calipers once a year, but I can't believe anybody really does that. Castrol LMA (low moisture absorption) brake fluid seems to help a bit with the pistons. The parking brake system is a whole 'nuther problem.

edit/add- Pulled the caliper today and the pins and pads were fine. The piston wouldn't turn or move, so it looks like a new caliper is in order.

duak:
I'll echo what Conrad says about the environment.  Vehicles from north eastern North America are usually in physically worse condition than those from the west coast of North America simply due to salt, sand and humidity.  I remember looking at a brand new Mercedes (9 kM on the clock) and the underhood components were already showing signs of corrosion.  And this from simply being shipped across the Atlantic, sitting on the docks and then taken by rail to Vancouver.

SilverSolder:
At some mountain tourist destinations, they zap the wheels of every car coming down from the mountain with an IR thermometer or thermal imager and pull over cars that have overheated brakes.

It seems to me that an IR thermometer pointed at the wheels every once in a while would let you keep an eye on things with the least hassle, and it would work on multiple cars too...

SilverSolder:

--- Quote from: duak on June 29, 2020, 10:27:57 pm ---I'll echo what Conrad says about the environment.  Vehicles from north eastern North America are usually in physically worse condition than those from the west coast of North America simply due to salt, sand and humidity.  I remember looking at a brand new Mercedes (9 kM on the clock) and the underhood components were already showing signs of corrosion.  And this from simply being shipped across the Atlantic, sitting on the docks and then taken by rail to Vancouver.

--- End quote ---

Calipers last about 7 to 10 years for me, but I clean them, re-grease, and even repaint them every time I change the brake pads (which is every couple of years).

coromonadalix:
Dont want to be a drag, but is your problems due to poor brake maintenace,  calipers pins rusted, calipers pins boots damaged or they let water in ?
 
Are the brake pads moving correctly ? i've seen some people remove the stainless steel sliding plate / shim ... and the main piston (brake disk)  is it getting stuck ??

Never had this kind of problems unless damaged parts or poor maintenance or bad adjustments in the rear drums brakes ???

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