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I wrote down some readings of temperature over time, inside the engine compartment of the truck with the block heater running.
4:00 PM - 31.8F
4:05 PM - 31.6F (had the hood open)
4:24 PM - 35.6F
4:46 PM - 39.2F
5:01 PM - 40.1F
5:18 PM - 40.6F
It sure seems to show that the block heater does make a difference in the air temperature inside the engine compartment.
Nearly a ten degree difference in an hour and 18 minutes doesn't seem too bad!
Now, I just want to keep some of the heat in there!
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