Re: Tank Heater Placement On 806D

Posted by Hugh MacKay on September 08, 2006 at 18:05:11 from (209.226.106.86):

In Reply to: Re: Tank Heater Placement On 806D posted by teddy52food on September 08, 2006 at 10:18:27:

teddy: I can readily see you've not had a lot of experience starting diesels in excessively cold climates. To start with heat rises, thus block heaters of any description warm the crankcase very little.

I've seen 400 to 800 cubic inch diesels cranked for 10 min. at 1,200 to 1,500 rpm, much faster than any electric starter will turn them, and never so much as fire even a little bit. You plug that same engine in with a 1,500 watt circulating block heater for a couple of hours, crank it at 800 rpm and it will be going in 10 seconds. I could site you hundreds of examples at temperatures down to -40F, where it took one of two things; upper engine heat or ether.

I've seen them towed, air starters that never give up, yet it takes that heat in the ignition chamber to make them fire.

In the far north they use propane and oil fired circulating block heaters continuous just to keep a running diesel going, it takes the added heat to keep ignition chamber warm enough to fire. I briefly drove one of these trucks last winter, and was advised to use it if engine operating temperature dropped below 160 F. These also serve as a block heater and hot water furnace should you have to spend the night in the bunk. I never got to enjoy that.

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