Cold weather start, with glow plugs and block heater. Why does my tractor not start at minus 20 C?

[Egon]

guys are block heaters really 600 dollar's? its a freaking heating element.

BLOCK HEATER FOR MAHINDRA TRACTOR (19670050000)

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1996 Dodge Ram 2500 Engine Heaters | Canadian Tire

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[RalphVa]

Still a huge waste of electric energy to keep them plugged in all the time. Kinda cooks the coolant, too.

 

[Egon]

Still a huge waste of electric energy to keep them plugged in all the time. Kinda cooks the coolant, too.

A lot of folks would find 20 minutes I suffice to. Keeping it warm should not harm the coolant.

With the 24 hour plug in never heard of boiling the coolant or damaging it. That’s over a 70 year or so time span.

Easy to check temperatures with an infrared type heat temperature gun.