Pat,
Where did you buy your Powertune booster? I had the same issue with mine
last year when I installed it. I have searched the web and found other
instances of this issue. I determined the problem to be an internal flat
0-ring that drives the air valve that is either incorrectly sized, or
possible of the wrong material. As a temporary fix I "machined" it down on
my lathe using emory paper. The problem is greatly reduced, but there's a
hint of it still. I am just now getting back to resolving this problem. I
was looking to to contact Powertune. I was also talking with a guy
(Leighton) at British Parts NW. He sells these and says that he's never
heard of this problem. My mistake was buying it on Ebay. I saved a couple of
bucks up front, but am now paying for it.
Dave
----- Original Message -----
From: <2x2doc@gmail.com>
To: <healeys@autox.team.net>
Sent: Saturday, March 27, 2010 6:23 PM
Subject: [Healeys] Brake booster won't release
> I'm redoing the brakes on my 1959 BT7. I've replaced the brake lines and
> added a Powertune brake booster. I bled the brakes using an Ezeebleed
> system. The problem is that the booster won't release once I've applied
> the
> brakes (it eventually releases but can take a couple of minutes) I've
> mounted the booster just like the instructions say. The brakes work fine
> if
> I disconnect the vacuum line (and plug the manifold). I've bled the brakes
> numerous times and it always hangs up. Anyone have any ideas?
> Pat Williams
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