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Old 02-20-2010, 09:06 PM
360ci 360ci is offline
LawnSite Senior Member
Join Date: Nov 2009
Location: Kitchener, ON
Posts: 989
Covering the rad on diesels is commonplace in sub zero temps. Most diesels would take about an hour of idling to get up to operating temp at 0F, or about -15C. best way to warm up a diesel is to drive it, gets the boost up and the engine warms up as much as a gas does. However, the larger radiator used to cool the engine can work against interior heat in the winter, especially on the highway. The intercooler will operate at max efficiency in colder weather at least, but it also cools combustion air and thus the block cools down the colder it is outside. Blocking off the rad aids in keeping engine operating temp at an efficient setting, and gives the operator some heat.
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