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Why would the rear calipers have seized then? Lack of use of handbrake (ie. leaving it in 'P' but never applying the handbrake)?, incorrect adjustment of handbrake cables?Surely the calipers move every time the brakes are applied - I appreciate the rears do much less work than the fronts but even so, I still can't think what causes them to actually seize. Call me a conspiracy theorist but could rear caliper seizure (or partial seizure) be the actual cause of rear wheel bearing failure, which has occasionally been an issue with the PHEV I believe. The Mitsubishi main dealer I use actually checks the rear wheel bearings for wear when the PHEV is serviced. Whether this check was an instruction from Mitsubishi HQ I don't know.I remember from my Jeep Cherokee days that partial caliper seizure (in the case of the Cherokee front calipers as it didn't have rear discs, and only after more than 10 years and high mileage) caused the wheel bearing grease to overheat and melt, thereby depriving the bearing of enough grease and wearing it out. It was easy to spot though as it affected steering and you could smell the heat - and if things got really out of hand - see the smoke! By which time the discs were probably warped too.In the case of a PHEV though, maybe not so obvious if it's rear calipers. Although I'd have thought they'd still smell a bit. But why the seizure in the first place - I had a close look at mine and they seem to be a pretty robust and conventional design of caliper.
Why would the rear calipers have seized then? Lack of use of handbrake (ie. leaving it in 'P' but never applying the handbrake)?, incorrect adjustment of handbrake cables?
Surely the calipers move every time the brakes are applied - I appreciate the rears do much less work than the fronts but even so, I still can't think what causes them to actually seize. Call me a conspiracy theorist but could rear caliper seizure (or partial seizure) be the actual cause of rear wheel bearing failure, which has occasionally been an issue with the PHEV I believe. The Mitsubishi main dealer I use actually checks the rear wheel bearings for wear when the PHEV is serviced. Whether this check was an instruction from Mitsubishi HQ I don't know.
I remember from my Jeep Cherokee days that partial caliper seizure (in the case of the Cherokee front calipers as it didn't have rear discs, and only after more than 10 years and high mileage) caused the wheel bearing grease to overheat and melt, thereby depriving the bearing of enough grease and wearing it out. It was easy to spot though as it affected steering and you could smell the heat - and if things got really out of hand - see the smoke! By which time the discs were probably warped too.
In the case of a PHEV though, maybe not so obvious if it's rear calipers. Although I'd have thought they'd still smell a bit. But why the seizure in the first place - I had a close look at mine and they seem to be a pretty robust and conventional design of caliper.
