Yes, they work off manifold vacuum. That is why you need an electric switch
of sorts & a vacuum motor to control the vacuum to turn the valve on or off.
And yes, some of the A/C controls are electric (& expensive).
Jim Stuart
Reply to <jimbb88@usa.com>
-----Original Message-----
From: owner-mgb-v8@autox.team.net [mailto:owner-mgb-v8@autox.team.net]On
Behalf Of James J.
Sent: Sunday, October 26, 2003 11:37 PM
To: Jim Stuart
Cc: Mgbv8 List (E-mail)
Subject: Re: FW: Heater valve
Some of the A/C ones are electric too. But don't the vacuum ones work
from manifold vacuum? Or do all domestic cars have a separate vacuum
pump to run the 'HVAC' system? I admit I don't know.
In particular, though, what Dodge van and what part number are we
looking for?
Thanks
JJJ
Jim Stuart wrote:
>-----Original Message-----
>From: Jim Stuart [mailto:vze3swyy@verizon.net]
>Sent: Sunday, October 26, 2003 10:40 PM
>To: 'James J.'; 'Barrie Robinson'
>Cc: 'mgs@autox.team.net'; 'mgb-v8@autox.team.net'
>Subject: RE: Heater valve
>
>
>The heater valves found in A/C kits work very well, but they are vacuum
>operate, not cable operated as the MG valve is. They can be used, but will
>require an on/off switch & a vacuum motor.
>
>I have used a Dodge valve in the past that was cable operated, & it worked
>very well. I suggest you follow up on Jack Emory's suggestion. Jack has a
>real talent for finding alternatives.
>
>Jim Stuart
>
>Reply to <jimbb88@usa.com>
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