Re: Idle vs. Shutdown

Posted by jokers on August 24, 2006 at 07:16:17 from (69.202.126.120):

In Reply to: Idle vs. Shutdown posted by ZachOH on August 23, 2006 at 23:19:50:

I`ve often wondered the same thing, is it more cost effective over the long run to shut down the diesel or let it run for short periods of inactivity, especially when you factor in the high cost of a diesel starter(service life, finite number of starts) and the multiple batteries being cycled(service life again, increased load means greater chemical reaction in cells) for those starts. I guess that my best answer is "it depends", lol.

I know that with the turbo diesels I always try to let them run for a few minutes to cool the oil in the turbo. Even a few minutes at idle, easpecially after a hard pull or long high speed run, the oil temperature drops significantly. Overheating and coking the oil on the turbo bearings will make you wish that you gave the engine a cool down period.

BTW, the old saw about it being cheaper to leave a light on than to turn it off for short periods on non-need is mostly bs. Lightbulbs are non-reactive loads meaning that they draw their rated wattage in all energized modes of operation versus an electric motor that might draw up to 9 times it`s rated running current to start and we all know that wattage and current are directly proportional relative to the voltage.

So the answer is still "it depends", lol.

Replies:

• Re: Idle vs. Shutdown Gerald j. 08:06:01 08/24/06 (1)
  • Re: Idle vs. Shutdown jokers 22:05:55 08/26/06 (0)

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