Bob and Dave, my truck has a factory 450W frost plug heater and it just barely does the job at minus 30C. I HAVE started it at minus 39C after 8 hrs of preheat, but it was a real struggle, using a second booster battery too. If you haven't experienced these kinds of temperatures you just can't imagine it. I will probably install a much larger coolant heater (or a second) one day. I have talked to the Philips and Temro folks: their catalog suggests a screw-in 400W heater that fits into a fitting MY tractor doesn't have! Dipstick heaters were banned here some time ago because they can only keep warm oil warm. That's not much use, so people plug them in to warm cold oil which cannot circulate as it warms. so it carbonizes on the heater instead. There were too many engine fires as a result. I don't worry about what the law says, and COULD order one, but I'm told the fire danger is real and they just cannot warm really cold oil.
I did just install twin 50W oil-pan heaters the other day, but 100 watts is not enough. The oil pan is a two-sump sort of design, made to fit around the drive shaft, so only very small peel-and-stick pads can be attached. Kubota didn't make it easy!
I should say we are moving to an off-grid solar house later this year. I need enough watts to get that engine warmed up FAST, say in two hours or so, because my generator is going to be supplying the power. Overnight is out of the question. Yes, I will be eventually building a nice warm shop/garage, but that's in the future. Paul
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Today's Featured Article - 12-Volt Conversions for 4-Cylinder Ford 2000 & 4000 Tractors - by Tommy Duvall. After two summers of having to park my old 1964 model 4000 gas 4 cyl. on a hill just in case the 6 volt system, for whatever reason, would not crank her, I decided to try the 12 volt conversion. After some research of convert or not, I decided to go ahead, the main reason being that this tractor was a working tractor, not a show tractor (yet). I did keep everything I replaced for the day I do want to restore her to showroom condition.
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