This, very often, lands them in an endless loop of problems that seem to have no end, where the shop will milk their wallets dry, throwing major components at the truck repeatedly. For these type of truck owners, this is definitely an expensive engine, because they will typically run to the nearest dealer/shop whenever something is not quite right. Why is this a downside?.Many truck owners these days are NOT mechanically inclined at all, nor do they have the wish to become so. One of the biggest downsides I think, as a truck owner with one of these engines, is the fact that this engine likes to be worked on at least every 200-250k miles or so, to keep it healthy, especially if the EGR/DPF is in tact and operating. I am not here to post about how great this engine is by any means, sure it has its flaws, like any other engine, but it definitely is not as bad as most would have you think. This bothers me greatly, because I think things like this have happened so often, that it has now become common knowledge to just assume the turbo's/dpf's/egr valves on this engine are just bad/junk, and are the likely cause, when in fact, very often they are not. Hopefully, this thread will put a stop to some of this through shared experience and education, allowing us O/o's out here to keep more of our hard earned cash, rather than giving it to the now, way-overpriced dealers and engine shops that are all too eager to blame a turbo or other major component, when most often, its likely to be a dirty sensor or a pipe that has gotten clogged with soot. There are many who will disagree, because there have been way too many unnecessary bad experiences by drivers and truck owners that speak otherwise. When comparing it to other brands of similar age/style, I think that for the one-truck O/o, among these newer Post EGR/DPF egines, the CM871 is the easiest, least expensive engine to keep healthy with its EGR/DPF intact, while maintaining decent fuel mileage long term. First tho, I would like to share my personal opinion of this engine. So far, most of the problems I have seen O/o's have with this engine, stem from neglect of key components that need regular attention, so I will open this thread with a list of what I have found that should, by now, be considered common knowledge. I have helped many, many people solve the elusive EGR, DPF, fuel mileage, and other problems that regularly plague this engine, and have learned much in return. I have one of these engines in my truck and know much of its secrets. I am creating this thread so that those who know, own, and/or repair this particular engine can learn from each other.
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