You can change the switch without losing very much brake fluid. If you are fast
with your fingers, you should be able to have the old one out and the new one
screwed in very quickly. Always check the fluid level, pump the brake a few
times and everything should be fine.
It wouldn't hurt to do a thorough flush and bleed to replenish the fluid, but
it shouldn't be necessary just changing the switch.
Paul
In a message dated 6/8/2004 12:18:54 AM Eastern Daylight Time,
hugtrees@xxxxxxxx writes:
>
>
> Will the removal of the brake light switch from the brake master cylinder on
> a 1958 cause the master cylinder to drain completely? It has been a few
> years since I performed the task and I cannot remember.
>
> On my car, the switch was on the bottom of the master cylinder. I recall
> some leakage but am wondering if there might be a restrictor of some kind
> that would prevent all the fluid draining out.
>
> If I had to make a bet, I'd say the master cylinder would drain out rapidly.
>
> Hugh
>
>
>
>
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