One of my spare boosters (did I really need two?) got turfed during a
bout of "tough love" while selling-moving from my house; it had
surface rust but was likely ok. I didn't make time to figure a way to
bench test it.

With a brake booster on the bench, if one sealed it (use brake check
valve during test?), created a vacuum inside it, and the vacuum didn't
change over several hours or even overnight, would this indicate that
the booster is likely ok?

I'll be demonstrating a lack of knowledge here, but does a larger than
OEM brake booster potentially add more hydraulic pressure to the
braking system or does it simply provide more brake pad & shoe to
metal pressure with less effort from the driver?

Am asking on a point of curiosity. I am far less knowledgable of
Vanagons than Mark!

Thanks,

Neil.

On 9/18/14, mark drillock <mdrillock@cox.net> wrote:

> Yes, there is a BMW booster that can be used if you rework the linkage
> rod carefully. I have one in one of my 87 vans. The BMW unit is larger
> and gives more boost. I pulled another one today from an auto recycling
> yard. It was $30 out the door.

--
Neil n

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