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Old 05-18-2017, 07:03 PM   #14
tw
Read? I only know how to write.
 
Join Date: Jan 2001
Posts: 10,604
Quote:
Originally Posted by footfootfoot View Post
The car has sat for a couple of months, when I started to drive it the brakes were pulsing like mad, as though one of the rotors was a potato chip.
Any car that sits outside for a month (exposed to rain) will have rust on its rotors - except where a brake pad protected it. It will take time for rust to wear off. And then that rotor will be same dimension all around - no more pulsing.

Highway speeds are unnecessary. Best is an open road (no traffic) and do much light braking. Best that way so that rust does not embed into brake pads.

Should a car sit for over a month, best is to cover all disc brake wheels with a garbage bag. Keep rain out.
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