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Discussion Starter · #1 ·
Now that the early morning temperatures have dropped into the high 20's I find I have little (if any) brakes when I first get in it. I pump my brake pedal a few times in rapid succession and then they'll (usually) work. Once the under hood temperature increases they work fine.

It appears the new DORMAN seals in my master cylinder take a "set" during the very cold early morning hours and it takes a few pumps and an increase in my under hood temperature to un-set them.

As I have never owned any other cars or pickups that did this I can only assume the "rubber" formulas used by DORMAN's suppliers have changed. As I know how to deal with it it's not a problem but it's one of the many reasons why I would never let anyone else drive it unless I was in it.
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