Brakes again

Bernie Benz b.benz at
Mon Aug 16 23:50:47 EDT 2004

I implied/stated that, if the guide pins were a problem with their boots
intact, most probabily the caliper internals were likewise a problem,
inasmuch as these two are/should be serviced together.  DFI if IAB, but do
it right when necessary!


> From: "Derek Pulvino" <dbpulvino at>
> Date: Mon, 16 Aug 2004 20:20:03 -0700
> To: b.benz at
> Cc: 200q20v at
> Subject: Re: Brakes again
> Ladies and gentlemen, herein we have one of the few exceptions to the
> dfiiiab adage.  Pay close heed as it could be eons until you see it again
> (rib, rib).
> I mean, I never said the caliper was leaking, and it would seem that any
> compromised function of the guide pin is independent of the inner workings
> of the caliper.
> dp
>> Derek,
>> These guide pins have 3 flats on their diameter to allow for displaced air
>> and/or grease to escape as the pin moves into the blind hole in the
>> caliper.
>> Therefore, penetrating oil should be able to easily flow down the pin if
>> held in a vertical position.  Soak it, and then don't be timid with a
>> wrench
>> on its hex head.
>> Have you ever, or how long has it been since you last flushed the brake
>> fluid?  Dito, rebuilt all calipers?  If you have a frozen guide pin with an
>> in tact boot, I can guess the answer!
>> Bernie
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