Re: how hard to run a diesel engine?????

Posted by jdemaris on April 12, 2005 at 11:14:10 from (209.23.28.197):

In Reply to: how hard to run a diesel engine????? posted by vabill on April 12, 2005 at 06:40:28:

It all depends on the specific engine. Some diesels are made to run at peak efficiency a low RPMs, some high. Many short-stroke diesels, especially some used in cars and pickup trucks see a huge drop in efficiency when RPMs exceed 1900. With the issue of longevity instead of efficiency, diesels need to be run at their designated operating temperature and not left idling at very low RPMs for long periods of time. But, the idea (that I've been told many times) that a diesel needs to run full bore - well, in my opinion, it's nonsense. Initial break-in to establish a cylinder wall wear pattern and to prevent ring-walking - requires one to load the engine a bit - but not a full load, and not for the rest of the engine's useful life either. Most deisel engine companies now rate their engines expected life in gallons of fuel consumed instead of engine hours. With that figuring, a higher load means more fuel consumed, i.e. engine's life getting used up a little faster.

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