Warped rotors - my .02

[John Hadjisky <john.hadjisky@altavista.digital.com>]

Marathon Motors in Traverse City, Michigan (Northern) did some excellent 
work on my '90 CQ this spring.  When I asked about rotating rotors, they 
opined that rotors typically pit as well as warp.  In wintry climates w/ 
plenty of road salt, salt can accumulate in small quantities inside the 
pit, causing it to corrode in a V pattern (with the wide end of the V 
oriented towards the *inside* of the rotor.  That means if you 
rotate/resurface the rotor, you will probably make the pits larger rather 
than smaller, so reduce the surface area in contact w/ the pad.

So to the general advice of "resurface if they're and not too warped, 
replace if they're old or too warped" I would add

     "resurface if they're new and not too warped *and not too pitted*, 
replace otherwise"

Which in almost all cases means replace if you live in the snow belt.

By the way, New England colors are peaking right about now....won't be 
long....

John Hadjisky
john.hadjisky@altavista.digital.com
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