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Power Strokes
6.7 Tech
When to use plug in Engine block warmer
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[QUOTE="135Hoster, post: 802898, member: 5296"] The *ONLY* time I've ever *HAD* to plug mine in was when it hit -45C. The engine refused to crank. I plugged it in for an hour and it started. Around -30C it takes a fair while to warm up. A block heater isn't going to hurt anything, and I would suggest using it below freezing. You can have a silly amount of wear on your engine when the oil has the consistency of molasses. Also you'll know it's working if you check your MFD when the truck starts, and the engine oil/coolant temps are above ambient. [/QUOTE]
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