Old Keel bolt repair - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 


Like Tree1Likes
Reply
 
LinkBack Thread Tools
  #1  
Old 08-07-2011
Member
 
Join Date: Jul 2009
Posts: 97
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 6
alanr77 is on a distinguished road
Old Keel bolt repair

As I am preparing the boat for her trip to a marina for haul out and refit this winter, I am making a list of all the fun things I have to do to her this year. I pretty much have a plan for how I will do everything except for the following;

I have read countless articles on how to repair the keel bolts on a Catalina 30. I understand how to cut out the floor, remove the wood and install a plate to prevent the "smile". However, when inspecting the keel bolts, I am confused as to what action is required to repair my bolts. I have never seen anything like what is on my bolts. It almost looks like someone put welding slag on the bolts. I can't even begin to see how I will put a socket on these. Take a look at the pictures, any idea's?

Catalina 30 tech pictures by alanr77 - Photobucket
__________________
SV Salinity
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #2  
Old 08-07-2011
deniseO30's Avatar
Move over Joan Rivers!
 
Join Date: Nov 2006
Location: Bristol pa
Posts: 6,153
Thanks: 52
Thanked 91 Times in 81 Posts
Rep Power: 9
deniseO30 will become famous soon enough deniseO30 will become famous soon enough
Looks like an extreme example of rusty stainless! Scary! How about a hole saw the size of the bolt and just saw the the nuts off? Hole saw may not be deep enough so the bolt ends would have to be shortened..
__________________
Denise, Bristol PA, Oday 30. On Tidal Delaware River, Anchor Yacht Club. New Website!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

My boat is for sale.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #3  
Old 08-07-2011
LakeSuperiorGeezer's Avatar
Senior Member
 
Join Date: Oct 2010
Posts: 551
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 4
LakeSuperiorGeezer is on a distinguished road
I would get a Dremel cut-off wheel with appropriate mandrel for a size that fits the center hole in the cut-off wheel. The Dremel 456 1-1/2" fiberglass reinforced wheel is an example. It's small enough to get into a tight space and with enough time you can cut through a good size bolt. I would cut the bolt flush and try driving the bolt out with a punch. If that does not work, try drilling it out. First start with a pilot drill of about 1/8 inch and then follow with a 5/16 inch and then whatever the original bolt size. You could also try dissolving the rust with muriatic acid diluted ten to one. You could replace the keel bolts with silicon bronze. Even galvanized works better that stainless for keel bolts because stainless has about the same corrosion resistance as an ordinary steel bolt in an anaerobic environment where air cannot get to the stainless to create the protective coating.
Reply With Quote Share with Facebook
  #4  
Old 08-07-2011
mitiempo's Avatar
Senior Member
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 7,127
Thanks: 0
Thanked 71 Times in 62 Posts
Rep Power: 8
mitiempo will become famous soon enough mitiempo will become famous soon enough
They have to be replaced - cut the nuts off and drop the keel. The big problem is replacing them as they can't just be unwound from the keel due to their shape.
__________________
Brian
Living aboard in Victoria Harbour
Reply With Quote Share with Facebook
  #5  
Old 08-08-2011
Member
 
Join Date: Jul 2009
Posts: 97
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 6
alanr77 is on a distinguished road
Great...just what I didn't want to hear. I don't feel that I can drop the keel off this boat. That is a huge undertaking that costs far more than the boat is worth. Am I wrong? If I understand correctly, the keel bolts- iron not stainless in a 1976- are installed when the keel is cast. There has to be another way. The boat currently does not show any signs of the C smile. There is no water leaking. Maybe when the boat is pulled next month and I chisel off the rusted mess on the bolts I will be able to see some sort of threads that I can work with. In addition, maybe when I cut off the top layer of fiberglass to replace the wood I will find decent threads. Just trying to be optimistic. I may have to call Catalina and send them some pictures to see what they suggest. Maybe I am making the cost of replacing the bolts bigger than it actually is. And the story continues.......
__________________
SV Salinity
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #6  
Old 08-08-2011
TQA's Avatar
TQA TQA is offline
Bombay Explorer 44
 
Join Date: Apr 2009
Posts: 2,590
Thanks: 0
Thanked 47 Times in 43 Posts
Rep Power: 6
TQA is on a distinguished road
Dat NOT good. Dem bolts dey done mon. When exactly they will fail who knows but it looks sooner rather than later to me. You could attack them with a needle gun to see how much good metal is left and paint it if there is some.

If your conscience allows Ebay it for what you can get.

As for removing the keel an expert user with a gas axe and a little custom made thin steel protection could cut through those bolts in a couple of minute. Fire extinquisher to hand of course. Other wise forget the dremel, a three or 4 inch angle grinder with a cut off disc and just grind of the heads.
Reply With Quote Share with Facebook
  #7  
Old 08-09-2011
Member
 
Join Date: Jul 2009
Posts: 97
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 6
alanr77 is on a distinguished road
Update, Catalina Yachts is amazing. I sent them an email and got a response from an engineer in less than 12 hours. P/N's, diagrams and instructions. All this for a 36 year old boat. I guess thats why they have been in business for so long. Anyway, next month I am going to cut away the wood and fiberglass above the keel. Hopefully there are some threads remaining under the mess in the pictures. I will then install 7 12" lag bolts into the keel with stainless steel plates with washers as support. I figure between the original bond between the keel and the hull, the remaining holding force of the original bolts plus the added lag bolts, I should be fine. Having spent a few hours researching this subject, I don't think there has been any documented cases of a C-30 keel falling off. This is somewhat comforting as I was really upset about the serious setback with this boat. Now that I have a plan I guess we will see how it turns out. I will take lots of pictures and video of the keel bolt repair, keel stub wood removal and keel crack repair. I will then save this in a file that I can share with anyone dealing with the same issues.
__________________
SV Salinity
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #8  
Old 08-09-2011
mitiempo's Avatar
Senior Member
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 7,127
Thanks: 0
Thanked 71 Times in 62 Posts
Rep Power: 8
mitiempo will become famous soon enough mitiempo will become famous soon enough
After you cut out the wood build up the glass in thickness with roving or biaxial, going well up the sides of the keel stub for added strength - to replace the strength that was supposed to be created by the wood layer originally.
__________________
Brian
Living aboard in Victoria Harbour
Reply With Quote Share with Facebook
  #9  
Old 08-09-2011
Junior Member
 
Join Date: Jun 2010
Location: Long Isalnd
Posts: 19
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 0
CatalinaRob is on a distinguished road
check out this link for details on this repair:

The famous
Reply With Quote Share with Facebook
  #10  
Old 08-09-2011
SloopJonB's Avatar
Senior Moment Member
 
Join Date: Jun 2011
Location: West Vancouver B.C.
Posts: 10,777
Thanks: 58
Thanked 52 Times in 49 Posts
Rep Power: 4
SloopJonB will become famous soon enough
There is a recent discussion of this process in the "General" forum under "Morgan 35...."

Those photos look like you have rusted steel bolts bursting from under resin encapsulation. If that is the case, do you have an iron keel?

An iron keel makes it a pretty simple, albeit big job to replace the bolts. Properly replacing the bolts in an iron keel is a much better way to go than sistering and it is very do-able by oneself - I did it on a 10,000 lb. keel (with help from heavy equipment of course). You are then back to new, not just patched up.

Check out the thread I referred to and get back here with any comments or questions
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
I, myself, personally intend to continue being outspoken and opinionated, intolerant of all fanatics, fools and ignoramuses, deeply suspicious of all those who have "found the answer" and on my bad days, downright rude.
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
25' Catalina Keel Bolt tklinck C25 and 250 2 09-10-2011 12:10 PM
Encapsulated or Bolt On Keel? aasault Boat Review and Purchase Forum 34 06-19-2011 09:20 AM
CAL 20 Keel bolt replacement Calabego Cal 1 12-21-2008 04:24 PM
Cal 20 Keel Bolt Issue sailorlinus Cal 3 11-12-2008 04:48 PM
Keel Bolt, Mirage 30 PegasusX Gear & Maintenance 0 09-05-2006 06:48 PM


All times are GMT -4. The time now is 11:19 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.