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Author Topic: Creaking forward Bulkhead in C34 MKII  (Read 735 times)

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Allatsea

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Creaking forward Bulkhead in C34 MKII
« on: October 01, 2018, 03:13:20 PM »

Hi all,
I have a 2005 C34 MKII and lately been bugged by the creaking of the forward bulkhead caused by movement between the top of the bulkhead and the ceiling.

Close inspection reveals that the retaining screws along the outer edge of the bulkhead have been cut to length such that they only protrude around 5mm beyond the thickness of the bulkhead ply.
This seems to suggest the screws are cosmetic and the top of the bulkhead is intended to be floating.

So, to my questions.
Is the top of the bulkhead intended to be floating?
If so, any suggestions to resolve the creaking issue?
Why shouldnít I (by appropriate means) permanently attach the bulkhead to the ceiling?

Best regards,
Allan
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Dale Stone

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Re: Creaking forward Bulkhead in C34 MKII
« Reply #1 on: October 02, 2018, 11:44:46 AM »

Hi Allen,
I have a 2001 MKII. I'm not sure what you mean by retaining screws being cut. I assume the bulkhead should be fixed.
I will take a look at mine tonight.
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Dale Stone 2001 C34 II, Hull #1526, Salem Ma

Allatsea

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Re: Creaking forward Bulkhead in C34 MKII
« Reply #2 on: October 02, 2018, 02:47:07 PM »

Hi Dale,
Thanks for the reply.
Re the cut retaining screws - either they were intentionally cut during manufacture to limit the distance (about 5mm) the screw penetrated the fibreglass flange, or by the previous owner.

I canít think of a reason why this was done except, maybe, just shoddy workmanship?
Anyway, Iíd be interested to know if full length screws were employed on your boat.
regards,
Allan
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Dale Stone

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Re: Creaking forward Bulkhead in C34 MKII
« Reply #3 on: October 03, 2018, 05:42:19 AM »

Hi Allen,
I was not able get on the boat last night. Weather here was yuck. I plan getting on it Thursday night and will report back Friday morning. I will take pictures and post them if I figure out how to do that.
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Dale Stone 2001 C34 II, Hull #1526, Salem Ma

Dave Spencer

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Re: Creaking forward Bulkhead in C34 MKII
« Reply #4 on: October 03, 2018, 08:25:35 AM »

Hi Allan,
Iím aboard my boat now and checked my bulkhead screws. I removed 2 and both were 1 1/4Ē long and were firmly threaded into the flange in the headliner.  My bulkhead is 7/16Ē thick so the protrusion is far more than you are seeing on your boat. Mine is a 1994 Mk 1.5 so it isnít necessarily identical to your boat but it seems unlikely to me that this element of the boatís construction would change.
Iíve never heard creaking from my forward bulkhead. Hope this helps.

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Dave Spencer
C34 #1279  "Good Idea"
Mk 1.5, Std Rig, Wing Keel, M35A Engine
Boat - Lion's Head, Ontario
People - London, Ontario

Allatsea

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Re: Creaking forward Bulkhead in C34 MKII
« Reply #5 on: October 03, 2018, 08:47:01 PM »

Thanks Dave - that does help.
Itís now occurred to me that maybe the bulkhead was fixed by design and a previous owner had a creaking problem - couldnít fix it, so decided to convert into a floating bulkhead by shortening the screws and leaving them installed for the cosmetics.
regards,
Allan
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Allatsea

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Re: Creaking forward Bulkhead in C34 MKII
« Reply #6 on: October 03, 2018, 08:52:35 PM »

Hi Allen,
I was not able get on the boat last night. Weather here was yuck. I plan getting on it Thursday night and will report back Friday morning. I will take pictures and post them if I figure out how to do that.
Hi Dale, thanks for that - much appreciated.
Looks like Dave Spencerís 1994 C34 definitely has a fixed bulkhead, so it will be interesting to see what the setup is on your later model.
regards,
Allan
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Dale Stone

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Re: Creaking forward Bulkhead in C34 MKII
« Reply #7 on: October 05, 2018, 06:00:57 AM »

Hi Allen
I was there at night and took pictures. Hopefully I can insert them. The forward bulkheads are firmly screwed into the head liner. The screws are all tight and the one I removed is 1.25" long.

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Dale Stone 2001 C34 II, Hull #1526, Salem Ma

Jim Hardesty

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Re: Creaking forward Bulkhead in C34 MKII
« Reply #8 on: October 05, 2018, 01:23:47 PM »

Allen,
By any chance, are you missing the trim beading. May be the wrong name, don't know what it's called, the fabric/rope piece shown on the above pictures at where the bulkhead meets the ceiling.
FWIW   Shamrock is a 2001 MKll and has no creaking.
Jim
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Jim Hardesty
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Allatsea

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Re: Creaking forward Bulkhead in C34 MKII
« Reply #9 on: October 05, 2018, 02:59:20 PM »

Hi Dale,
Thanks so much for your help - youíve confirmed for me the bulkhead should be fixed.
So itís academic who or why mine was modified to floating.
I will now revert it to fixed.

Hi Jim,
Re the trim beading, itís there on my boat but I will verify it is doing what it should and replace it if necessary.

Thanks all for your help guys - Iím on the right track now  :clap

Allan
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