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I solved the block heater problem with a small boiler I put together from a copper pipe tee, two caps and a block heater that fit right into the copper tee. There is a 130deg furnace limit switch fastened to the top, the hot end, with JB Weld Putty.
The boiler is installed in the hose coming from the heater and into the side of the thermostat.
There are two brass hose barbs soldered into the caps.
The loop heating element is installed pointing down.
There is a bolt through the boiler that holds the heating element in tight against the gasket.
This thing will circulate a gallon a minute on bench test. Flow is through the engine and the cabin heater exchanger. Nice on a cold morning. If I plug it in when the engine is hot it won't come on for about an half an hour then the heating on time is on for twenty minutes and off or 30. this will vary on outside temperature.
My cash investment is around 65 bucks.
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1984 300SD turbo 126
"My true love"
God made me an atheist and who am I to question His wisdom
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