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Old Sep 10, 2010 | 09:53 AM
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dsolomon
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From: Fallston, MD
Identify this item???
Tearing down the 350 in my 1971. What is the purpose of the vacuum controlled valve at the rear of the intake. It is inline with one of the heater hoses and shown in the picture below.

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Old Sep 10, 2010 | 10:54 AM
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Lady72nRob71
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Heater water valve! Flow is shut off when A/C is on MAX or system is OFF.
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Old Sep 10, 2010 | 10:56 AM
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dsolomon
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Guess that means a replacement is in my future. Anyone know the part number or if a aftermarket part is available?
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Old Sep 10, 2010 | 10:39 PM
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svnt442
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Here ya go.

http://www.oreillyauto.com/site/c/de...+control+valve
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Old Sep 11, 2010 | 06:30 AM
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Lady72nRob71
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Rockauto should have them also. Before installing, make sure it opens when vacuum is applied to it and not the other way around like the later years do.

BTW, what did I win?
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Old Sep 11, 2010 | 02:33 PM
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It keeps the engine from pumping water through the heater core ALL of the time.
Especially nice on cars that have the fan pumping air all the time.

Originally Posted by Lady72nRob71
BTW, what did I win?
2 Garbage cans, and a 1 week supply of garbage!

Jim
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Old Sep 11, 2010 | 06:17 PM
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1969w3155
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Is that the Chevy style that you have there?
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Old Sep 12, 2010 | 06:28 AM
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Lady72nRob71
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Originally Posted by Warhead
2 Garbage cans, and a 1 week supply of garbage!
Thanks - just what I always needed.
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Old Sep 12, 2010 | 10:37 AM
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dsolomon
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Could be a chevy style valve. The pictures of the valve on the O'Reilly and RockAuto site don't look anything like the one I have.

Thanks for all the help guys!
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Old Sep 12, 2010 | 10:44 AM
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svnt442
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I don't know that you'll find a small diaphram one any more.
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