MAN 1100 diesel rebuild

Jorge,

Your thread has been re-titled. I doubt "MANGranades" is a word ever indexed by Google and for sure it has no relevance on YachtForums. Top of the Technical forum is a sticky asking you to please use descriptive titles for best indexing.

I thought all those engines with weak Pistons were up graded. My 820's have been great. -base engine for the 1100. I,'d be interested in seeing rebuild estimates. How many hours on your 1100's

I would guess to do them right would be $40-50k each, access is everything in determining the number. In a commercial boat with access to everything probably even less, like $35k

Could be the D2842-LZE, V-12 1100 hp. Also a mechanical.

I agree with Beau, I though that all the MAN's from that era got the piston upgrade. Maybe a couple slipped through the cracks here or there, but our dealer told us that there was an active search to find them all and get the upgrade done.

Wearing a flak jacket and helmet in the engine room? That's a bit extreme.

We're talking about 23 year old motors. Chances are they have 6,000 + hours on them and simply need to be rebuilt from wear.

In any case, the "MANGranades" label removed by Carl doesn't seem like it would be relevant 23 years later.

No, I personally know of a set of the 10 cylinder 820's in a 2001 50' Post that has over 6,500 hours and they still run good. The owner had the top end did the heads and injectors done 200 hours ago, just because, and the cylinders still all looked great. I've never had any internal issues with MAN's. Just sensors and electrical boards and electrical stuff. I like them, parts are expensive and synthetic oil in the common rails is also, but they're smooth, quiet, fuel efficient, and just a good fit for a lot of boats. My guess is the OPs engines just have lots of hours.

I go round and round with this in my head sometimes. Man's are always slightly more economical than CAT's, not much but 3-5% in fuel burn. Man's, it is more expensive than CAT's for routine maintenance, unless you're using them a lot which most yachters don't. When you figure in the CAT oil change/service is required every 250 or 200 hours depending on the engines, and the MAN is 400 hours. If you're doing close to 400 hours then it actually comes out a little cheaper. Electrical parts are for sure more expensive. But, in some boats the MANs are a much nicer fit. I ran a new 70' Princess the other day with 12 cylinder MANs, 27 knot cruise. You didn't hear the engines ANYWHERE on the vessel, not in the salon, not on the bridge, not on the aft deck, the propulsion was smooth. I don't think that would be the case if it were a Cat boat. Cat, since it's primary market is heavy machinery, doesn't focus on N+V reduction. Some boats the CATs are superior with their torque...…..But each yacht seems to have 1 engine brand/size that is most suited to it.

Capt Ralph,
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