Quote:
Originally Posted by speeder
Brake boosters are either good or bad, there isn't a lot of in between. If it holds vacuum, it's good. Period.
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Stick a MityVac gauge on the vacuum connector of the old one and pump it up -25lbs and wait.
If it holds internal negative pressure, i.e. vacuum, the old rubber seals are there.
(for now)
The rod spring tension with the shaft lubrication will still be unknown.
It should slide and return by pushing on it.