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Author Topic: Air Valve Piston Orientation  (Read 145 times)

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june2021

  • An AMGBA Club Member
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  • Posts: 25
Air Valve Piston Orientation
« on: April 24, 2021, 11:34:34 AM »
I have cleaned and am rebuilding a Zenith Carb on my 1976 MGB (many parts damaged before I bought the car).. 

Everything is going well but I have one question:

When I reinstall the air valve piston, how should it be oriented (the two bottom holes toward the intake, toward the engine, or one on each side)?  I donít want to rely on how the butcher assembled it and I havenít found a video that helps with that.

Thank you so much!
Larry Jones

JohnTwist

  • AMGBA Club Tech Staff
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  • Posts: 117
    • University Motors
Re: Air Valve Piston Orientation
« Reply #1 on: April 24, 2021, 11:47:03 AM »
There are little tabs on the rubber diaphragm Ė one on the inside diameter and one on the outside diameter.  These fit into slots in the air piston and the carb body.  Correctly placed, they ensure that the two air holes are closest to the ENGINE. 

Hope this helps.

SAFETY FAST!
John H Twist
University Motors Online
100 East Beltline Avenue SE
Grand Rapids MI 49506-2410
Cell: 616-307-6737
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SAFETY FAST!
John H Twist
University Motors Online
100 East Beltline Avenue SE
Grand Rapids, MI  49506

616-307-6737
johntwist@universitymotorsltd.com
www.universitymotorsltd.com

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