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Author Topic: Smile repair  (Read 162 times)

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jamie mccormick

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Smile repair
« on: May 23, 2020, 05:16:01 AM »

So  can i just   " v" out crack on my 1988 keel, and apply some g/flex 655 or some other product,(3M 5200?) and get a fix for a crack along the leading edge.it looks to be a small opening on the leading edge, tapering to a hairline crack for 18".
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scgunner

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Re: Smile repair
« Reply #1 on: May 23, 2020, 07:14:27 AM »

Jamie,

I usually just grind mine out, or "v" it, let it dry out for a day or two, then fill it with West System, sand it smooth and finish it off with primer and bottom paint.
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Kevin Quistberg                                                 Top Gun 1987 Mk 1 Hull #273

KWKloeber

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Re: Smile repair
« Reply #2 on: May 23, 2020, 09:15:52 AM »

Jamie You can, but long-term success depends on

1) How bad (or good) the keel bedding is once you start grinding below the surface.
Mine was punky for about half the length of the bedding. Water had attacked the polyester-resin-based bedding and I had an extensive project.

2) whether you want it one-and-done or a periodic-maintenance item.
I wrapped the joint with bi-axial fiberglass tape/epoxy resin (would probably use carbon fiber tape now) and faired it using medium density filler. That was ~25 yrs ago and no recurrence.

-Ken
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Twenty years from now you'll be more disappointed by the things you didn't do, than by the ones you did.
So throw off the bowlines.  Sail away from the safe harbor.  Catch the tradewinds in your sails.
Explore.  Dream.  Discover.   -Mark Twain

Noah

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Re: Smile repair
« Reply #3 on: May 23, 2020, 09:41:59 AM »

Assuming no sign of leaking, I vote for the simple V grind and fill with Gflex.
« Last Edit: May 23, 2020, 09:51:22 AM by Noah »
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1990 hull #1014, San Diego, CA,  Fin Keel,
Standard Rig

Ron Hill

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Re: Smile repair
« Reply #4 on: May 23, 2020, 01:12:49 PM »

jami : After you make a fix, just make sure that the next time the boat is blocked that the majority of the weight is on the nose of the keel!

An important thought   :thumb:
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jamie mccormick

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Re: Smile repair
« Reply #5 on: Yesterday at 05:21:46 AM »

Thanks for the replys,I dremeled out the smile , it doesn"t appear to be punky,there is now palm sized chip out of the leading edge of the keel ,which i assume needs  epoxy.wondering do i epoxy up to the crack then apply G/flex, or just epoxy chip area and crack both, ....also i do suspect the boat is not in cradle properly ,there is no blocking under keel.
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KWKloeber

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Re: Smile repair
« Reply #6 on: Yesterday at 10:17:13 AM »

J

In my opinion, you have some major grinding, of various types/objectives, to do in order to fix the smile - even to the lowest acceptable repair. If you are intending to fill what you have (I presume that the photo is the finished product of dremmeling?) you’ll have continuing problems.

A dremel (IMO) is generally not an adequate tool for keel bedding repairs.  What would you think of a body shop that uses dremel tools to work on a crash up of your vehicle?  An angle grinder is about 12 boat bucks at harbor freight (plus grinding wheels, sanding discs, etc.)

You need to get deeper into that crack (there’s still “cracks” present - you are not yet in to competent keel-to-buss bedding. I’ve done extensive f’glass and ‘poxy work/repairs for 35 years and found an angle grinder is a  MUST for most keel joint work. You can’t just fill that palm-size missing section of fairing - it needs to me feathered back and filled and faired, which you cannot do with a dremel.
Have you read any of the West Systems’ Epoxyworks tech articles on filling/fairing?  If not I can find and link you to them.

https://groups.io/g/Catalina30/album?id=63662

Ken
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Twenty years from now you'll be more disappointed by the things you didn't do, than by the ones you did.
So throw off the bowlines.  Sail away from the safe harbor.  Catch the tradewinds in your sails.
Explore.  Dream.  Discover.   -Mark Twain

Stu Jackson

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Re: Smile repair
« Reply #7 on: Yesterday at 10:31:19 AM »

>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>
....also i do suspect the boat is not in cradle properly ,there is no blocking under keel.

Have you considered getting some shims and putting some blocking under the keel?
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Stu Jackson, C34 IA Secretary, #224 1986, "Aquavite"  Cowichan Bay, BC  Maple Bay Marina  SR/FK, M25, Rocna 10 (22#) (NZ model)

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jamie mccormick

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Re: Smile repair
« Reply #8 on: Today at 05:10:14 AM »

just wasnt sure how far to go with grinding, i havent done this before,it only took a few minutes to do what i did.I have not seen tech articles that you speak of.I guess i could have keel shimmed and or blocked in cradle but was planing on launching next week .I will make sure its done in the fall
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LogoFreak

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Re: Smile repair
« Reply #9 on: Today at 06:28:57 AM »

This brings back some memories... not on a Catalina 34 but a Catalina 30. If it were my boat and I intended to sail it for many years to come and not worry I’d be dropping the keel. You’ll never know how those bolts look like...

https://jeunesse27.wordpress.com/projects/
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1992 Catalina 34 mk1.5

dfloeter

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Re: Smile repair
« Reply #10 on: Today at 08:13:35 AM »

Just another thought, have you torqued the keel bolt nuts?  Maybe shim and jack up the front of the keel, torque the nuts and see what happens to the leading edge gap? 
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Dietrich Floeter
Traverse City MI
1996 Catalina 34 TR WK #1317
Universal M35A
Rocna 15
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