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Old 09-05-2013, 04:26 PM
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Diesel - engine block heater?

I'm ordering a diesel - do I need the engine block heater? What does it do exactly? I'm in NYC and go up north a lot in the winter.
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Old 09-05-2013, 04:56 PM
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The block heater plugs into a 120V outlet and keeps the engine block warm for easier starts in very cold weather. Diesels have come a long way starting in cold weather (my wife's Jetta TDI has glow plugs), but I like to have the extra assurance when the weather is predicted to dip below 0 overnight.
Her TDI really doesn't like to start when it gets that cold.
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Old 09-05-2013, 05:36 PM
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Anybody know how much current the block heater pulls? I was thinking of putting it on a light timer in the winter if the draw is not too high.
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Old 09-05-2013, 07:57 PM
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Re: Diesel - engine block heater?

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Originally Posted by Matt'sGC View Post
The block heater plugs into a 120V outlet and keeps the engine block warm for easier starts in very cold weather. Diesels have come a long way starting in cold weather (my wife's Jetta TDI has glow plugs), but I like to have the extra assurance when the weather is predicted to dip below 0 overnight.
Her TDI really doesn't like to start when it gets that cold.
Thanks. Thank I'm going to add it then - seems like a no-brainer given it's 95$... Can't hurt to have it.
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Old 09-06-2013, 05:44 PM
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Re: Diesel - engine block heater?

Block heaters warm the engine coolant. It's standard here in Canada and I use it whenever the overnight temperature is expected below -10C. I don't know how much current is used but I have mine on a timer which goes on about 3 hrs before my daily commute.
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Old 09-06-2013, 06:02 PM
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Re: Diesel - engine block heater?

I ordered a block heater on my diesel as well...

I'm sure this is a dumb question but I'll ask for piece of mind. Is there anything wrong with using the remote start and having the car run a while before you go outside and unplug the heater?
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Old 09-06-2013, 06:23 PM
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So a timer works, good. Just didn't want to burn the house down. Don't know anyone that uses a block heater where I live, might only get to 10 below a few times in a winter. I thought I would be on the safe side and try to baby the CRD.
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Old 09-06-2013, 08:41 PM
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Re: Diesel - engine block heater?

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Originally Posted by shoestring View Post
I ordered a block heater on my diesel as well...

I'm sure this is a dumb question but I'll ask for piece of mind. Is there anything wrong with using the remote start and having the car run a while before you go outside and unplug the heater?
Good thing you asked! None of the heater manufacturers recommend that the engine be started while the heater is plugged in. Now, the problem could be easily solved by setting a timer on the outlet to go ON 4 hours before you leave then OFF 30 minutes before you leave. However, with a block heater there is really no reason to remote start- heat will be pretty immediate.
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Originally Posted by Schmelz View Post
Anybody know how much current the block heater pulls? I was thinking of putting it on a light timer in the winter if the draw is not too high.
400-600 watts depending on manufacturer.
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Old 09-06-2013, 10:27 PM
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Re: Diesel - engine block heater?

A block heater up nawth is a cheap investment. Have one for the Hemi and would plug it into a timer when needed.
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Old 09-06-2013, 11:32 PM
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The other advantage is that a cold diesel is hell on a cold battery. Diesels have 18:1 compression and draw more current when cranking. A weak (or cold) battery will strain to start a cold diesel. I don't think Jeep is using a bigger battery either. My 3.0L Mercedes has a huge battery.

Diesels require a minimum cranking rpm to fire. If the starter won't spin it fast enough due to a cold battery and thick oil, game over. Newer diesels do better but the laws of physics still apply. If its going to be really cold, plug it up!

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Old 09-08-2013, 12:19 AM
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Re: Diesel - engine block heater?

Any chance of a photo of the diesel block heater fitted to the GC wk2 2013 onwards. I am trying to find a part number for it so that I can fit one for my jeep GC WK2 2011 Motori diesel 3.0 V6. If one is fitted to current diesel engine then you should be able to buy a replacement?
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Old 09-08-2013, 01:18 AM
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It has been mentioned that all VM 3.0 diesels have the heater. The $95 is for the chord!

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