Re: Sylphon Thermostat on a '32 (901)
Posted by 32model901 On 2013/3/16 20:07:04
Marston,
1. None of the parts that are inserted into the top radiator tank are painted black, including the brass housing that covers the bellows.
2. The rod is not nickle plated. I've removed and cleaned a few '32's and they had no trace of plating, they were only painted black.
3. Yes, the travel is right around 1" when heated to 160-180 deg. F.
4. If you have the original '32 type Slyphon thermostat the bellows will be immersed about 1/2 to 3/4 in coolant. The replacement units sometimes have the bellows covered in a brass shell.
5. You will need two gasket. 1/32 thick is closer to the original. Be sure to check the flange on the radiator tank and the flange of the cast iron housing for flatness. As long as these are flat the 1/32 thick gaskets will work fine. One gasket goes between the radiator tank flange and brass shell, one goes between the brass shell and cast iron housing.
6. Adjust the unit so the shutters are closed when the coolant is cold. They should just start to open when the temp. gauge is 1/4 the way up and fully open at the 1/2 way mark.
7. One trick to eliminate leaks on at the unit is to use new packing material on the shaft that exits the unit, the one with the packing nut. Also put a little black RTV on the screws holding the unit to the flange on the top tank of the radiator. The screw threads are very close to the edge of the flange and coolant sometimes gets to the threads and leaks out. The RTV will seal up the threads and prevent a leaks.
A few pictures to assist you:
Attach file:
(99.75 KB)
(124.18 KB)
(124.94 KB)
(114.66 KB)
(94.91 KB)
1. None of the parts that are inserted into the top radiator tank are painted black, including the brass housing that covers the bellows.
2. The rod is not nickle plated. I've removed and cleaned a few '32's and they had no trace of plating, they were only painted black.
3. Yes, the travel is right around 1" when heated to 160-180 deg. F.
4. If you have the original '32 type Slyphon thermostat the bellows will be immersed about 1/2 to 3/4 in coolant. The replacement units sometimes have the bellows covered in a brass shell.
5. You will need two gasket. 1/32 thick is closer to the original. Be sure to check the flange on the radiator tank and the flange of the cast iron housing for flatness. As long as these are flat the 1/32 thick gaskets will work fine. One gasket goes between the radiator tank flange and brass shell, one goes between the brass shell and cast iron housing.
6. Adjust the unit so the shutters are closed when the coolant is cold. They should just start to open when the temp. gauge is 1/4 the way up and fully open at the 1/2 way mark.
7. One trick to eliminate leaks on at the unit is to use new packing material on the shaft that exits the unit, the one with the packing nut. Also put a little black RTV on the screws holding the unit to the flange on the top tank of the radiator. The screw threads are very close to the edge of the flange and coolant sometimes gets to the threads and leaks out. The RTV will seal up the threads and prevent a leaks.
A few pictures to assist you:
Attach file:
(99.75 KB)
(124.18 KB)
(124.94 KB)
(114.66 KB)
(94.91 KB)
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