<VV> brake failure? - Probably not the master cylinder

[Jack Kean]

Yes this is an important subject (nice way to end the year for this list).

So, how can a person tell if the master cylinder on his/her car (I have 
a 68 convertible) has a fully functional shuttle valve, or just a light 
switch?

Regards from misty Arlington, Texas

jack kean
68 Monza Convertible, 140x4

On 12/28/2010 12:19 AM, Sethracer at aol.com wrote:
> I spent a half hour looking around on several credible web sites, verifying
>   what I was pretty sure of. "Some" valves act as a warning light switch
> only, not  acting as a true shuttle valve. The true "shuttle valve" should
> slide in  the direction of the low pressure (Blown hose, rusted line, etc.) and
> seal the  blown part of the system from the master cylinder.