Skip to main content

I have removed the leaky heater control valve from Georges #2272. It is one of the early style valves with the round actuating rod. Distinctly different from the version in my #7102 with the flat lever actuator.

The leak is from a failed seal around that rod. More like a seep, it emitted a slow but steady drop every fifteen plus minutes.

I disassembled it. I thought I'd heard the early valves can be repaired by replacing an O ring but the thing looking back at me from inside the valve body doesn't look like that. I think I see a small seal pressed into a bore?

Is there a replacement part to seal that little rod or is it time for a new valve? Any favorites?

We're hoping to get 2272 back on her feet this weekend, this is one of the last of the details.
Original Post

Replies sorted oldest to newest


The first pic below should be like the one from George's car. I don't know what is used for the stem packing (o-ring or seal), as I've never taken this type apart. Since his is leaking, pull it apart and find out what is used for the packing. Wilkinson shows a rebuilt exchange heater valve for $157.64.

The second pic is a replacement valve, which may look the same as yours in #7102. Note that the early valve has a 3/8" pipe thread, and the later valve has a 3/8" flare fitting. Coincidentally, both of these fittings (3/8" pipe thread and 3/8" flare) have the same nominal diameter and thread pitch (5/8"-18), with the pipe thread being tapered.

When using the replacement valve in an early car, no thread adapter is necessary. If used in a later car, then an adapter is necessary. The adapter is 3/8" female pipe thread by 3/8" male flare (see pic #3), as you need to connect a 3/8" male pipe thread to 3/8" female flare. The adapter will lower the valve about one inch, which should not be a problem. The adapter is readily available at home improvement stores.

If using the replacement valve in early cars, you will not be able to use the original support strap, which is not a problem. Simply connect the valve to the heater core tube and attach the actuating cable. Check for clearance between the valve's actuating arm and the kick panel. The valve's hose connection will be in a slightly different position, and may require the use of a molded 90* hose.

PM sent.


Images (1)
  • Heater_Valve_'71
Link copied to your clipboard.