Question regarding chainplates

Discussion in 'Ask A Beneteau Owner' started by mannc3, May 17, 2019 at 11:56 AM. Add this thread to a FAQ

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  1. mannc3

    mannc3

    Joined Friday
    6 posts, 0 likes
    Beneteau Oceanis 381
    Patriot Games US Cataumet
    Have a 1999 Beneteau 381, and the chainplate on the port side is showing rust on the horizontal rod that the U-shaped end of the Tie-Rod connects. Apparent leak in the chainplate decking mount.

    That horizontal rod (no idea what it is called) is now a safety concern, and it seems to be glassed in - is there a non-destructive way to replace that rod?

    Thanks,
    Chris
     


  2. NYSail

    NYSail

    Joined Jan 6, 2006
    2,069 posts, 186 likes
    Beneteau 423
    US Mt. Sinai, NY
    First... pictures always help.
    Second.... sometimes (most times) destruction is the easiest way to get things done...... at least for me.

    Greg
     


  3. mannc3

    mannc3

    Joined Friday
    6 posts, 0 likes
    Beneteau Oceanis 381
    Patriot Games US Cataumet
    Quite right on the photos - I am awaiting them from the surveyor
    From a construction description, it looks like these rods were glassed in and meant to be permanent, so I think destruction is the only route
     


  4. Mechone

    Mechone

    Joined Mar 20, 2016
    187 posts, 44 likes
    Beneteau 351
    ca WYC Whitby
    That must have been a long neglected leak, the chain plates are stainless and you must unbolt the vertical rod inside the boat to pull out from deck to re-bed .The round hole in the top of the chainplate, is just the sealant Beneteau uses ,I machined 2 delrin plugs to press into the holes along with 4000uv to rebed
     


  5. mannc3

    mannc3

    Joined Friday
    6 posts, 0 likes
    Beneteau Oceanis 381
    Patriot Games US Cataumet


  6. Mechone

    Mechone

    Joined Mar 20, 2016
    187 posts, 44 likes
    Beneteau 351
    ca WYC Whitby
    Wow that's nasty, make sure the deck hasn't gone soft around the chain plate also. Anything with glass is repairable ,looks like it needs to be cut out replaced with new 316 That is the strongest part of the hull where the matrix is glassed to the hull ,everywhere else it's glued. Bring your wallet and have it done by a good shop, like I said earlier anything can be repaired with glass in fact made stronger than factory Kevlar / Carbon fiber Matt more bridging of the glass etc ...good luck
     


  7. Stu Jackson

    Stu Jackson

    Joined Feb 26, 2004
    20,466 posts, 898 likes
    Catalina 34
    224 CA Maple Bay, BC, Canada
    I'm not a Beneteau owner, but it would seem counter intuitive that a sailboat manufacturer would design and build something that required regular routine maintenance to do so without access.

    Island Packet owners notwithstanding.
     


  8. Mechone

    Mechone

    Joined Mar 20, 2016
    187 posts, 44 likes
    Beneteau 351
    ca WYC Whitby
    Really that leak is from years of neglect by owner ,the piece in question should have been good for life mine is 1994 and still looks new.I'm quite sure there items on your own boat that should be for life ,but you may have to cut the deck out because you neglected a leak
     


  9. Stu Jackson

    Stu Jackson

    Joined Feb 26, 2004
    20,466 posts, 898 likes
    Catalina 34
    224 CA Maple Bay, BC, Canada
    1) Not true. I have superb access for literally everything. And nothing, especially on a boat, is for "life."
    2) True that if neglected it would be. I don't have that problem, 'cuz I keep ahead of those kind of issues. Not everyone does.
    I keep repeating that chainplates are part of basic maintenance. The fact that they are all too often neglected doesn't change that fact.

    Pretty cool, actually, Mechone, we get a yes and a no all in one reply! :)
     


  10. Bluenose

    Bluenose

    Joined Jan 10, 2018
    103 posts, 16 likes
    C&C & Beneteau 331
    Ca Halifax
    It may only be surface rust.....pull apart and then assess.
     


  11. mannc3

    mannc3

    Joined Friday
    6 posts, 0 likes
    Beneteau Oceanis 381
    Patriot Games US Cataumet
    Thanks Bluenose, running my finger on the surface on the bottom left and right caused flakes of rust to come off. Seems to have penetrated quite a bit
     


  12. ToddS

    ToddS

    Joined Sep 11, 2017
    79 posts, 33 likes
    Beneteau 373
    US Cape Cod
    It is hard to tell from the picture how much space/access you have at the fore/aft "ends" of that fiberglass, but if it were me, I'd try drilling a hole at both fore and aft ends, just a bit larger than the diameter of that rod, such that (after you take tension off the shrouds/chainplate) you could tap the rod out from one end. Even beyond that rod, I'd inspect the rest of the attached hardware there as well, replacing anything else suspect under the "while I'm in there" approach. Presumably you've inspected the rest of the chainplates on your boat and they're not all in similar condition. Besides the obvious suggestion of fixing the leak/source, I'd also see if I could figure out where else the water went (downstream) from there... presumably into the bilge, but did it pool/corrode anywhere else along its journey? Electrical connections? Keel bolts? wherever it went before leaving the boat. It should be easy enough to follow the trail of rust it would have left behind. Good luck!
     


  13. Bluenose

    Bluenose

    Joined Jan 10, 2018
    103 posts, 16 likes
    C&C & Beneteau 331
    Ca Halifax
    Flakes of rust would be OK, may not impact the structure. Disassemble and investigate further, may not be as bad as you think.
     


  14. jssailem

    jssailem

    Joined Oct 22, 2014
    9,006 posts, 3,921 likes
    CAL 35 Cruiser
    US Salem, Moored Port Everett WA
    It appears the stainless piece is around a non stainless rod or bar. That does not look right. Perhaps a previous owner inserted a non stainless piece doing a repair. If this is structural it will require repair.

    Sounds like your in the middle of a purchase. Your Survey should be enlightening. It might be a boat to walk away from.

    Does not look like a Beneteau manufacturer repair to me.
     


  15. Davidasailor26

    Davidasailor26

    Joined May 17, 2004
    1,652 posts, 401 likes
    Beneteau Oceanis 37 LE
    US Havre de Grace
    I agree. Stainless may get crevice corrosion and ooze some rust, but that looks like all out rusting of a more mild steel. My guess is it's not OEM and should be replaced. Of course, once you have it out cleaning or replacing are the easy parts - it's getting it out that seems to be your problem, and for that I don't have an answer.
     


  16. Mechone

    Mechone

    Joined Mar 20, 2016
    187 posts, 44 likes
    Beneteau 351
    ca WYC Whitby
    I just looked at mine it is not that big of a job .Remove the chainplate and attaching hardware off the pin.
    The Glass is very thick on top where the load would be and very thin underneath. Use a dremel with a flex attachment and a sanding drum. Grind the bottom of the thin epoxy coating(its not glass)underneath ,then hit the pin straight down and it will come out .Feel the under side of the pin and you will know what im talking about. Put new pin in ,mix up some thickened epoxy ,hold the pin up and epoxy back in
     


  17. Bluenose

    Bluenose

    Joined Jan 10, 2018
    103 posts, 16 likes
    C&C & Beneteau 331
    Ca Halifax
    Well that makes sense that the toughest part would be above, as that is where the load would be.
     


  18. mannc3

    mannc3

    Joined Friday
    6 posts, 0 likes
    Beneteau Oceanis 381
    Patriot Games US Cataumet
    Thanks Mechone - so the pin is smaller than that support so it can be maneuvered out of that hole?
     


  19. Mechone

    Mechone

    Joined Mar 20, 2016
    187 posts, 44 likes
    Beneteau 351
    ca WYC Whitby
    Yes no problem
     


  20. Bluenose

    Bluenose

    Joined Jan 10, 2018
    103 posts, 16 likes
    C&C & Beneteau 331
    Ca Halifax
    Please let us know how you make out in the end.
     




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