One MAN engine fails on last day end last trip of our summer holliday’s

[Divemaster1]

Sorry to hear that Bart ... Good luck with the re-build!

 

[kashurst]

bad news - but hopefully it can all be done inside the boat, good luck.

 

[MapisM]

we then tried to start the engine, but it stalled with a heavy "clunc"

Urgh, I almost felt the awful noise, while reading your post! Very sorry to hear that, B.

All the very best for the repair anyway.
If nothing else, having found someone knowledgeable on site is a good starting point...

 

[AndieMac]

Urgh, I almost felt the awful noise, while reading your post! Very sorry to hear that, B.

All the very best for the repair anyway.
If nothing else, having found someone knowledgeable on site is a good starting point...

Exactly my thoughts MM...will watch this thread with interest.

Hope all is sorted without too many dramas Bart.

 

[BartW]

first we took off the alternator, then we had good acces to the pulley's, and were able to unscrew the 8 x M16 bots

here is the pulley assembly
2 belts for the alternator, and 2 belts for the waterpump, and a timing scale inbetween

then the parts of the virbration damper were free to take off

so the cause of the disassembling was age / broken metal ring


here you can see the fixing point on the cranc shaft,

the area around it is slightly damaged (not too bad)
some bolts of that cover plate were damaged,
one had be grinded to get it off

 

[BartW]

Short Update,

2 weeks ago they started the works,
engine has been prepared for lifting, bits and pieces taken off,
kooling water was found in the exhaust,

cylinder heads were taken off; all cylinders look ok
but there was cooling water in lowest 2 cylinders
MAN engineer suspects a crack in the turbo cooling housing

then they build a cradle around the engine.

today, the engine is lifted, gearbox and oilpan are taken off,
most bearings of the crancshaft are damaged,
many metal particles were found in the oilpan.

tomorrow they will start taking appart the timing gear housing, and the crancshaft
pictures will follow later.

The MAN engineers suspects that the crack in the cooling water cirquit came first,
then came a very strong vibration, that caused the damper and much more to break,

I still believe that running the engine too long with a broken damper caused all the damage, also the cracks in the coolingwater cirquit (?)

 

[Deleted User YDKXO]

Good luck Bart

 

[vas]

good to see progress Bart,

by the looks of it you may have everything sorted before the new year

confused as per the cooling water and turbo housing cracking.
Could that mean that your problem was caused from that? hydrolocking or something?
or could the crack be a side effect?

cheers

V.

 

[BartW]

confused as per the cooling water and turbo housing cracking.
Could that mean that your problem was caused from that? hydrolocking or something?
or could the crack be a side effect?

you were too quick,
have a look at the last paragraph of my edited post ;-)

 

[jimmy_the_builder]

Sounds grim, unfortunately. How much longer will the discovery phase last?

 

[vas]

you were too quick,
have a look at the last paragraph of my edited post ;-)

yes, that's me

ok, I guess once everything is apart they'll have an explanation for the whole thing.

no need to stress that if turbo housing was the issue you have to do the other side just in case

cheers

V.

 

[BartW]

Sounds grim, unfortunately. How much longer will the discovery phase last?

don't know,
also that will be a discovery,

step by step they open parts of the engine,
then they have to pressure test some parts,
and measure some parts accurately for tollerances,
don't know yet how long that will take...

when everything is inspected they can come up with a plan and cost estimation for the repair.

 

[rafiki_]

Good luck with this Bart. Sounds like your technicians are being thorough. Would be good to confirm the root cause, so you can eliminate a recurrence.

 

[rbcoomer]

Oh dear, sounds expensive Is it likely to be a viable repair or would it be more cost effective to upgrade and sell the working engine? I'd be worried where all the reamed off bits of metal debris have gone... Good luck with the work anyway and look forward to following your progress. Let's hope it's not too far up the expense scale!

 

[BartW]

Sounds like your technicians are being thorough

He mentioned that He'll have to backflush the engine's oil cirquit to get out every remaining metal particle

 

[BartW]

Oh dear, sounds expensive Is it likely to be a viable repair or would it be more cost effective to upgrade and sell the working engine? I'd be worried what all the reamed off bits of metal debris have gone... Good luck with the work anyway and look forward to following your progress. Let's hope it's not too far up the expense scale!

engineer is still considering that a repair is possible, but still discovering all the damage,
so no firm answer yet.

the only comfort here is that labour cost is a lot less expensive then in Belgium or SOF. (about 35% less )

I hope that they can repair the engine,
replacing by new is out of question (not in relation to the value of the boat)
second hand engines ? what will you get ? and a lot of extra work adapting everything for other engines, gearbox, props and shafts, engine mounting, etc etc..
not to mention acces, opening the cockpitfloor, taking out the passerel, etc etc..
and last but not least,
despite this failure, I love these old fashion fully mechanical diesel engines.

 

[wakeup]

Good luck Bart, at least this happened at the end of the summer though that is small consolation.

 

[rbcoomer]

Absolutely agree regarding the fully mechanical - simplicity has a lot of merit!

I'll keep fingers crossed that a fix is viable - especially given all the work you put into her and having made everything how you want it.

 

[AndieMac]

........"..I still believe that running the engine too long with a broken damper caused all the damage, also the cracks in the coolingwater cirquit (?)

Don't be too hard on yourself Bart, you didn't know at the time what was going to happen, you were just getting the boat back to your home port. Hindsight is a wonderful thing!

 

[jfm]

Good luck Bart