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Snags to be expected?

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Triple C View Drop Down
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Joined: 25 January 2013
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Triple C Quote  Post ReplyReply Direct Link To This Post Posted: 28 April 2013 at 13:34
Jon,
Our 385 leaked at round panel- front top of tank. Gasket? Martin knows about it
See you in Oct
Hanse 385 #114
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MisterM View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MisterM Quote  Post ReplyReply Direct Link To This Post Posted: 28 April 2013 at 19:32
Thank you for all replies and supportive words! Smile
 
We were moored in Enkhuizen Compagnieshaven where a mechanic helped us out, and over 100 people came by, started talking about the boat ("nice boat"!), and about our problem. Nothing can damage a yard's reputation more then such problems visible for all the yachting crowd! Money spent on presence at boat shows is better spent at better QC indeed, as this certainly gives Hanse's name a negative hit with all those people passing by, some of them in interest of a new boat themselves...
 
To give you all the best view of what happened, hereby the sequence of events, and in a post thereafter the pictures.
 
We got the boat from the dealer with 30 liters of diesel in the tank.
After test sail we sailed off and yesterday fully filled the tank at Stavoren.
We sailed off from Stavoren to Enkhuizen and after an hour or so noticed the diesel smell, then saw the amount of diesel in the bilge around the engine.
We continued to Enkhuizen Compagnieshaven, and there found a mechanic able to help us (Jachtservice Enkhuizen, cannot praise them high enough!).
The leakage was from the round metal part at the diesel tank, that is not at the highest point of the tank, but at a lower point, which serves to connect the hoses to the engine and the heater. I will call this the "manhole", not sure if it is the exact appropriate term.
The mechanic first took out 60 liters of diesel from the tank, to lower the level in the tank below the manhole, in order to stop the leaking.
He then drained the diesel from around the areas of the diesel tank and the engine, another 8 liters.
He then removed the manhole, and to our both surprise found that this is a real design flaw. My pictures will clearly show you that!
He added a flexible fitting/compound and resealed the manhole, as a temporary fix to hopefully prevent further leakage.
We then cleared out the areas around the tank and engine with wheel break cleaner and then water with washing detergent. In the end it was all clean and the smell appeared to be gone at that moment.
But in the cabin the smell remained. When looking through the several holes in the floor, we finally found that there was still a level of diesel just at the hull level. This is below the accessible areas, and can just be seen through the small holes in the "skeleton" of the hull.
We spent the night on board, in horrible diesel fumes causing headache and red eyes.
This morning we bought a Pela oil extractor vacuum pump, and entered the space between the skeleton and the hull with all kinds of small and flexible tubes. We were able to suck out another 17 liters (!!) of diesel.
We are now waiting for a mechanic of the dealer on Tuesday to clean the boat. I am not sure that they know how to clean this, as this may indeed require floor boards to be removed, and then still there is no good access to the area between the bilge/skeleton and the hull.
 
Our main concern is to get the diesel smell out of the cabin.
Our second main concern is to get a decent solution for the root cause of the problem.
Third concern is holiday plans cancelled and now many diesel stains on the teak in the cockpit
Fourth concern is minor other issues (boiler not working on electricity and leaking as well, disfunctioning interior lights, reverse mounted compass for plotter and steering system, etc...).
 
@Phil/Yeoman: can you tell me what the remedy was that you applied on the boats with this error in the UK? I would expect the manhole would have to be removed and replaced with a totally new structure. Or a whole new diesel tank, which might be impossible?
@Triple C: your problem sounds exactly the same (you will see it on the pictures). How was the cause of this remedied?
@Henrik: I feel totally the same. However, diesel is not very flammable, so this is probably not a big safety issue (we could still start the engine), but the intoxicating smell of diesel ís!
 
Machiel.
H385 #208 "Van Bree" - light grey hull
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MisterM View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MisterM Quote  Post ReplyReply Direct Link To This Post Posted: 28 April 2013 at 19:41
The overview of the diesel tank, indicating the "manhole":
H385 #208 "Van Bree" - light grey hull
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MisterM View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MisterM Quote  Post ReplyReply Direct Link To This Post Posted: 28 April 2013 at 19:43
The data on the diesel tank itself; this is not supplied by an external party, but appears to be manufactured by Hanse itself!
 
H385 #208 "Van Bree" - light grey hull
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MisterM View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MisterM Quote  Post ReplyReply Direct Link To This Post Posted: 28 April 2013 at 19:45
The diesel leakage, visible to the eye:
 
H385 #208 "Van Bree" - light grey hull
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MisterM View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MisterM Quote  Post ReplyReply Direct Link To This Post Posted: 28 April 2013 at 19:48
This clearly shows that the diesel is leaking from all areas between the steel manhole and the plastic diesel tank:
 
H385 #208 "Van Bree" - light grey hull
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MisterM View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MisterM Quote  Post ReplyReply Direct Link To This Post Posted: 28 April 2013 at 19:49
The manhole removed, anyone already can spot the issue?
 
H385 #208 "Van Bree" - light grey hull
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MisterM View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MisterM Quote  Post ReplyReply Direct Link To This Post Posted: 28 April 2013 at 19:51
Well, this should show you the cause.
The area between the screwholes is anything but straight. Any sealing ring added to that will NOT seal off!! So all area between the screwholes is a leaking area!
How to repair this??????
 
H385 #208 "Van Bree" - light grey hull
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MisterM View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MisterM Quote  Post ReplyReply Direct Link To This Post Posted: 28 April 2013 at 19:53
Then the cleaning starts.
Through the several holes in the floor, you enter this area:
 
H385 #208 "Van Bree" - light grey hull
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MisterM View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MisterM Quote  Post ReplyReply Direct Link To This Post Posted: 28 April 2013 at 19:55
But below, you will see this:
 
H385 #208 "Van Bree" - light grey hull
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