Re: Henry's 37 Limousine
Posted by HH56 On 2017/1/30 11:54:21
I had a similar problem with the modern temp sender I installed for testing purposes in the 47 head hole. Forget the thread size -- maybe 5/8-18 -- but luckily the sensor nut thread right in and no need for an adapter. Issue was hole depth was deeper than the nut could thread so bulb was loose. Bought a high temp O ring (type used for hot water and steam valves) and placed it around the bulb so it was between the bulb flange and the head. I was able to tighten the nut down sufficiently so it would compress the ring and seal the thing.
In my case, because I wanted to keep the original sensor in the normal head position I knew I needed a second location. Couldn't find a satisfactory commercial solution that was discreet or would sense properly and fit a Packard. The heater location on top of head kind of stuck out and figured it would not be accurate unless the heater was flowing water all year long. Decided to relocate the extra bulb to an adapter I made out of a 1" thick aluminum block conforming to the housing shape so it could sort of hide under the thermostat. Used one of the bulb adapters that came with the thermometer and threaded the aluminum block for that size. Think I used the 1/4 pipe adapter due to the space limitations on the 1" thickness of aluminum.
Even with the extra length of the bulb adapter, most of the bulb is exposed below the thermostat and should sense relatively the same temp water as the original sensor. A new thermostat housing gasket on each side of the adapter completed the mod.
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In my case, because I wanted to keep the original sensor in the normal head position I knew I needed a second location. Couldn't find a satisfactory commercial solution that was discreet or would sense properly and fit a Packard. The heater location on top of head kind of stuck out and figured it would not be accurate unless the heater was flowing water all year long. Decided to relocate the extra bulb to an adapter I made out of a 1" thick aluminum block conforming to the housing shape so it could sort of hide under the thermostat. Used one of the bulb adapters that came with the thermometer and threaded the aluminum block for that size. Think I used the 1/4 pipe adapter due to the space limitations on the 1" thickness of aluminum.
Even with the extra length of the bulb adapter, most of the bulb is exposed below the thermostat and should sense relatively the same temp water as the original sensor. A new thermostat housing gasket on each side of the adapter completed the mod.
Attach file:
(60.14 KB)
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