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Old 11-03-2010, 07:26 PM   #1
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Diesel Block Heater

At what temperature do you plug in the block heater for a diesel? Our rig is not in storage yet, but is winterized. We will be driving it for a few more weeks. Our nights right now are in the upper 20's. Also when you do start the rig, do you disconnect the block heater? First time with a diesel so pardon the dumb questions.
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Old 11-03-2010, 07:38 PM   #2
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I don't plug ours in until we intend to use it. If it's really cold, <20 degrees, I plug it in the night before, otherwise about 3 hours is enough to get everything flowing for an easy start.

Don't forget to turn it off after starting, ours is on an inverter circuit and will drain the battery quickly without shore power or the engine running.
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Old 11-03-2010, 08:45 PM   #3
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Thanks Martin. We are on shore power right now, but we will be taking the rig into the dealer for some final work before we put it into storage. I just wanted to make sure we did everything right.
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Old 11-03-2010, 09:10 PM   #4
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I plug mine in when it gets below 45* or so. You can use a good outdoor timer to turn it on about three hours before start time.

Best part is the heat works right off the bat! Not hot mind you, but warm.

You're not going to end the world if you start it before unplugging it but there's no reason to leave it plugged in after starting.
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Old 11-04-2010, 06:39 AM   #5
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Plug it in 3-6 hours before starting when the temps are below about 40 for a sustained period. Use an appliance timer if that means the wee hours of the morning. Unplug it after the engine starts.
My rig has a switch in the bedroom, but I have to get out of bed to reach the switch anyway. At least I don't have to go outside if its freezing! My engine starts well down to 30 degrees, so I don't use it very often.
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