MAN engine knackered camshaft question

[adarcy]

Re: More info please

Matt

MTU is part of Daimler-Benz and I thought MAN was in VW so am glad someone else thinks so.

Ahem, back to the issue. Can I just sort out in my mind what we're talking about when everyone says "fuel pump". According to different engines one can have a low pressure pump, high pressure pump and distributor pump. Often the last 2 are combined.

I believe I read that the new generation fo MAN were goiing to have common rail where the high pressure pump supplies the gallery and the injectors are presumably electronically controlled. I presume therefore that you have a mechanical distributor pump (easy to imagine in say a straight 6 Ford where there is a little 6 cylinder inline where each cylinder pumps into the fuel lines). Is yours a straight ?8 ?10 or a rotary distributor? does it have a separate fuel pressure giving pump?

Also, how many teeth on the meshing gear that stripped? i.e. could it slip with only one tooth missing? if the mesh is not lost, I don't see how the timing could slip although there would obviously be one hiccough per rev. If somehow the mesh slipped even one tooth at a time I reckon the engine would be more than 'lazy' or smokey I reckon it would stop. Sorry if it's knife in the wound but I'm just uneasy you/we/MAN haven't got to the bottom of this.

Commiserations anyway

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[jfm]

Re: More info please

They are V12, single cam per bank, and non common rail fuel. This engine has been around since at least the early 1990s, so zillions of them installed

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[tcm]

Re: More info please

ooh, dunno bout the pump itself. All i know it's that it's bosch, and heavy such that it needs 2 people to carry it, and a new one costs £15 grand, says the little engineer.

I think praps the gears mite mesh with one tooth missing. But i dunnno how it lost one tooth, and neither do they, although we all reckon one tooth going caused the others, duh.

Interestingly/worryingly, they've never seen or heard of this happening before. So, they haven't a clue about it, and it's not under warranty. Also, if the thing goes agin, that isn't under warranty either. Time to dump the thing perhaps..

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[DepSol]

Re: More info please

You should put it to MAN that the engineers working on your boat to fix this problem should be charging you at trade labour rates and not full labour rates.

That is if you want to compromise, if you have the time to spare fight it all the way.

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<A target="_blank" HREF=http://www.soltron.co.uk>the website</A>

 

[adarcy]

Re: More info please

<<we all reckon one tooth going caused the others>>

yeah - given

But if it's a V12 is the pump we're talking about a rotary or inline x12 distributor or just a pressure pump feeding a separate distributor?

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[starboard]

Re: More info please

Sorry to hear about your problem...is it not about time you did the sensible thing and bought a sailboat?? with a repair bill like that I could have bought 3 new inboard's and a new set of sails!!!
Anyhow good luck with your efforts.

Paul.

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[Bejasus]

Re: More info please

he may be wrong, but our Dutch mechanic here reckons it's an inline pump.

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[ArthurWood]

Sorry to learn about your on-going problems, Matt. As I mentioned earlier, their was a protest against MAN service a few years back at the Ft Lauderdale Boat Show, with people carrying placards entreating people not to buy MAN. I don't remember the details.
I found this website which might be useful to see if similar probs to yours have been reported: http://boatdiesel.com/Forums/index.cfm?CFAPP=29&Forum_ID=19
Good luck.

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