[Healeys] rebuilt HD8s

[George Vernau Sr]

Bob-
That's sort of what I expected to hear- thanks for the excellent and
succinct explanation.
George Vernau
Houston TX


On Wed, Jun 3, 2015 at 6:36 PM, Bob Spidell <bspidell at comcast.net> wrote:

> Almost certainly a leak at the servo.  When you apply brakes, a small
> slave cylinder in the servo moves a valve which gates atmospheric pressure
> into the outer part of the large air/vacuum piston (vacuum is held on both
> sides when brakes are not being applied).  If this valve is not sealing
> completely it could allow atmospheric pressure air into the manifold (there
> is a check valve on the servo to prevent this and hold some vacuum in the
> event of engine failure at speed, but it could leak, too).
>
> Now that you've done the carbs, it's on to the servo!   ;)
>
> Bob
>
> ------------------------------
> *From: *"George Vernau Sr" <gvernau at gmail.com>
> *To: *"Healey list" <healeys at autox.team.net>
> *Sent: *Wednesday, June 3, 2015 1:56:17 PM
> *Subject: *[Healeys] rebuilt HD8s
>
> I recently rebuilt the HD8 carbs on my 1967 BJ8 and the car runs great
> again (although the price of carb kits is just crazy these days). However,
> I notice a slight increase in idle speed whenever I put my foot on the
> brake, like when sitting at a light.  I can't ever remember noticing this
> before, is there a vacuum leak or is the booster not working properly?  Any
> ideas?
> Thanks for any input,
> George Vernau
> Houston TX
>
> _______________________________________________
>
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>
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