Haven't experienced this particular Healey joy (yet), but Alan's diagnosis
sounds very likely.
In addition, the large vacuum cylinder is lined with a magical 'dry lubricant.' Along with a too large/firm/stubborn
seal, this lubricant may be eroded enough to contribute to the problem, and should be restored. I used one of these
products (most likely, the 28A):
http://www.sandstromproducts.com/air-dry.html
Unfortunately, this stuff is beau coup expensive, and has hazmat shipping requirements. One can would probably do 20
boosters, and it expires after a couple years.
I don't know if there's a definitive way to tell if the lubricant should be renewed, but if the booster has over 100K
miles it may need it.
Bob
On 5/23/2012 3:28 AM, healey.nut@gmail.com wrote:
Chris -
The rubber seal used under the leather seal of the vaccum piston needs to be
cut in about half. The leather seal only needs a slight amount of pressure
from the rubber to work properly.
Many kits use a rubber seal that's either too firm or too big, and it causes
the piston and the can to lock shut.
Very common problem for years.
Hope that helps.
Alan
Sent from my BlackBerry. smartphone
www.blackberry.com
--
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Bob Spidell San Jose, CA bspidell@comcast.net
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