SailNet Community - Reply to Topic
Thread: Rusty Keel Bolts - How bad is it? Reply to Thread
Title:
Message:
Trackback:
Send Trackbacks to (Separate multiple URLs with spaces) :
Post Icons
You may choose an icon for your message from the following list:
 

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



  Additional Options
Miscellaneous Options

Click here to view the posting rules you are bound to when clicking the
'Submit Reply' button below


  Topic Review (Newest First)
02-06-2017 02:11 AM
Stumble
Re: Rusty Keel Bolts - How bad is it?

Quote:
Originally Posted by SloopJonB View Post
Not quite sure what you mean. Titanium cap screws ARE "bolts".
I read it as cap nuts, not bolts, my mistake.

I actually think Ti would make a very good keel bolt, but I have never seen a NA sign off on one (or reject one). I did speak with Mars Keel abou it and they were intrigued, but built to the design and didn't do much if any in house.

It's one of those things I think would be ok, but I would really want a pro to take a look before I did it.
02-06-2017 01:01 AM
SloopJonB
Re: Rusty Keel Bolts - How bad is it?

Quote:
Originally Posted by Stumble View Post
Finding titanium caps isn't hard, but as much as I love Ti, I wouldn't use them without replacing the bolts. The galvanic corrosion issue is just too much of an issue.
Not quite sure what you mean. Titanium cap screws ARE "bolts".
02-05-2017 05:56 PM
brccd
Re: Rusty Keel Bolts - How bad is it?

Hi Thanks for the reply...

I have read the other posts about taking one of the bolts out at a time while in water...but...

Like you mention, and I realize as well, if there is some wear, rust due to water between the hull and keel, and I try to take it out, and it breaks...then what...water coming in. So, I will wait until the boat is out on land, and try it there. However I see absolutely no water around the bolts, after drying the bildge out completely and for weeks. Thus, I am thinking the joint is ok...but you never know...its 32 years old...

I don't know about titanium bolts, and have the replacement bolts from beneteau already. The ones there have lasted this long and probably would keep lasting...so if the new ones go in, and care taken over the next years, would expect another 32 years!

Beneteau sent the washers, which looks like what was there so, I will still with that, but did wonder about different backing plates. Again the washers worked for all this time...guessing they will be good for another 32 years as well!

Thoughts?

Thanks
02-05-2017 05:47 PM
Stumble
Re: Rusty Keel Bolts - How bad is it?

Quote:
Originally Posted by SloopJonB View Post
A couple of things - inspecting just the heads or nuts of keel bolts is nearly meaningless - they usually deteriorate by getting wasp waisted where they go through the hull.

Since you have actual cap screws ("bolts") rather than the usual studs & nuts then checking will be easy for you. You don't have to have the boat on the hard to check them - just remove & replace one at a time. Keel bolts have huge safety margins on them so having one out at the dock is not remotely a problem.

If it was me I'd also make up some decent backing plates instead of simply relying on washers to spread those huge loads. I'd also try to find titanium cap screws to replace those steel ones.

Don't forget to put anti-seize on the threads when you replace them.
Finding titanium caps isn't hard, but as much as I love Ti, I wouldn't use them without replacing the bolts. The galvanic corrosion issue is just too much of an issue.
02-05-2017 04:38 PM
albrazzi
Re: Rusty Keel Bolts - How bad is it?

Quote:
Originally Posted by brccd View Post
Hi,

After cleaning the bolts up, and checking other things...the water was not from the keel bolts....it is bone dry.
Once the bolts were cleaned, they actually did not look so bad! 2 of the bolt washers do have some corrosion.

Attached some pics
most forward..looked worrisom and then cleaned up

some other bolts...cleaned those up more, and look better

I actually have new bolts and washers from Beneteau and plan to still try to replace them in the next short haul...this May.

I will start with one of them, with an impact wrench to loosen, and the breaker bar...hopefully that goes well.
3 of the bolts are actually fiberglassed over. If the ones I remove look ok, i might just leave those. There is one forward and might cut into the fiber glass to inspect the head...if that all looks well...may leave it alone.

last short haul, keel hull joint looked good...so hopefully still good...
Bert
They must never-seize them pretty good to come out looking like that. The 10 year cycle will definitely help. If I were buying a Boat knowing this needed to be done I would sure like to see it successfully completed prior to purchase. Or at least a receipt for the last service replacement. Maybe an overreaction but that sure is ugly.
02-05-2017 04:27 PM
SloopJonB
Re: Rusty Keel Bolts - How bad is it?

A couple of things - inspecting just the heads or nuts of keel bolts is nearly meaningless - they usually deteriorate by getting wasp waisted where they go through the hull.

Since you have actual cap screws ("bolts") rather than the usual studs & nuts then checking will be easy for you. You don't have to have the boat on the hard to check them - just remove & replace one at a time. Keel bolts have huge safety margins on them so having one out at the dock is not remotely a problem.

If it was me I'd also make up some decent backing plates instead of simply relying on washers to spread those huge loads. I'd also try to find titanium cap screws to replace those steel ones.

Don't forget to put anti-seize on the threads when you replace them.
02-05-2017 03:44 PM
brccd
Re: Rusty Keel Bolts - How bad is it?

Hi,

After cleaning the bolts up, and checking other things...the water was not from the keel bolts....it is bone dry.
Once the bolts were cleaned, they actually did not look so bad! 2 of the bolt washers do have some corrosion.

Attached some pics
most forward..looked worrisom and then cleaned up

some other bolts...cleaned those up more, and look better

I actually have new bolts and washers from Beneteau and plan to still try to replace them in the next short haul...this May.

I will start with one of them, with an impact wrench to loosen, and the breaker bar...hopefully that goes well.
3 of the bolts are actually fiberglassed over. If the ones I remove look ok, i might just leave those. There is one forward and might cut into the fiber glass to inspect the head...if that all looks well...may leave it alone.

last short haul, keel hull joint looked good...so hopefully still good...
Bert
02-05-2017 09:57 AM
skimatsu
Re: Rusty Keel Bolts - How bad is it?

Good info from svHyLyte. I would really like to see the Beneteau procedures if still available.
04-14-2016 10:32 PM
brccd
Re: Rusty Keel Bolts - How bad is it?

hello Mathieu, Thanks for the info

A couple of questions...

In the boat I only readily see 8 bolts, but they say there are 11?
Did you change all of them?

I have some weeping water coming through...did you have that?

Did you change them while the boat was in water or on land?

Did you use a socket and breaker bar, or an impact wrench to remove? If an impact wrench was used, any particular model?

I can add some pics of the bolts...I will get that this weekend...its currently in water.

This was my uncles boat, he originally obtained in France (1985)...I inherited it and the keel bolts are the last things I have not touched in it as far as repair! Trying to make it last another 30 years!

Thank you
Bertrand
04-14-2016 10:52 AM
Mathieu Tremblay
Re: Rusty Keel Bolts - How bad is it?

I did pulled one out and all threads are like new. We had a hard time with two of them, one was freaking torqued, and the others so rusty that it was impossible to have a good grip. I managed to grind it a little bit and fit a different socket on it.. I did not ordered from beneteau France because they don't stock them any more, but the boatyard finally got me a good price for same spec bolts...

Thanks to all of you, otherwise I might had agreed to remove the mast and separate de keel.

Cheers!
This thread has more than 10 replies. Click here to review the whole thread.

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

 
For the best viewing experience please update your browser to Google Chrome