Re: M35 brakes

From: Patrick Jankowiak (recycler@swbell.net)
Date: Fri May 05 2006 - 17:08:18 PDT


I suppose some moisture could have gotten in to the master cylinder via the
breather line.

Marty Galyean wrote:

> Patrick Jankowiak wrote:
>
>> I have no idea. No visible leaks, all looks well.
>>
> Visible leaks not necessary. Make sure the filler cap seals air tight
> against the atmosphere as over time condensation will bring in moisture.
>
>> Let me ask this. Does DOT5 expand when warm?
>>
> Not anywhere near significantly. Brake fluid by definition is a liquid,
> which will not compress, and resists the gas/solid phases under an
> extremely wide range of temperatures.
>
> It is hydrophilic, meaning it loves to absorb water and water vapor, and
> once it does, that water vapor will convert to steam when it gets hot,
> and this will expand. So your system really needs to be completely free
> of water and the fluid should have no contact with water and as little
> contact with even humid air as possible.
>
> I had a hydraulic cutting brake on a baja bug that I'd just purchased
> that would completely lock up after a few minutes of braking and getting
> hot (one reason the seller was selling). I completely drained the
> fluid, refilled with new, adjusted the angle of some of the brake lines
> to make getting air bubbles out easier, then refilled and bled, bled,
> bled, bled. Problem went away.
>
> Marty
>
>



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