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Mod | | | Forums66 Topics128,177 Posts1,057,060 Members48,460 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: Nov 2005 Posts: 30 Apprentice | | Apprentice Joined: Nov 2005 Posts: 30 | Hi Folks, Just rebuilt my valve, but am puzzled by the big empty space between the aneroid chamber (disk) and the lever that controls the valve position. Heater valve photo, Hi-res Is there a piece missing? Can anyone help me find the piece? The disk feels like it has some air pressure in it, so I guess it is OK, but I can't believe it would expand enough to fill this gap. I guess the valve will work this way, but it will be all or nothing. Can someone educate me here? Thanks in advance. Tom http://www.volkmanns.org/1952_gmc_pickup.htm | | | | | Joined: Jul 2003 Posts: 586 Shop Shark | | Shop Shark Joined: Jul 2003 Posts: 586 | Not sure I can help Tom, except to say I compared it to mine and they look the same. But, the photo may have missed some detail. Can't you run some low water pressure through it and test? Even a gravity water feed of some type. Cecil....... | | | | | Joined: Nov 2005 Posts: 30 Apprentice | | Apprentice Joined: Nov 2005 Posts: 30 | Thanks Cecil. The valve does open and close, but the degree of openness is supposed to be controlled by the aneroid, and I'm not sure it can expand enough to fill the 1/2" gap between the aneroid and the control lever. Does anyone know how much the aneroid expands? | | |
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