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Old 28 October 2013, 16:38   #21
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It's ok for diaphragms to leak somewhat. I have 2 new inserts (didn't have them at all) they don't leak. 2 old ones leak. Caps seal them nicely. You can swap them so you will have one on each side leaking. Ha, ha.
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Old 28 October 2013, 17:04   #22
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Yes, a couple of mine will let a small amount of air out when I pull the valve cap to inflate the boat. It's just a flapper valve, nothing super airtight. I left the cap off one of the chambers overnight (one of the ones that DIDN'T have an audible leak) and it was still flat in the morning.
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Old 02 November 2013, 12:33   #23
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I fixed mine by cleaning the bailer valve diaphragms and putting a little bit of marine grease on them. Now they all seal properly!
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Old 02 November 2013, 13:32   #24
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Nice! I should do that to mine one of these days.
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Old 03 November 2013, 15:54   #25
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Also grease the threads on the caps. That way they won't seize up.
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Old 26 November 2013, 02:46   #26
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FC470 Fixes and IC Valve Parts

I juts picked up an F470 an it needs a bit of help. I've been able to disassemble all but one of the IC valves and plan on buffing and greasing them up nicely. but the fourth one is corroded in there good and is bent a bit to boot so that I can't even screw in the valve. Do you thin I can bend it back or do you think I ought to just buy a new inner brass cone once I get this one out? Any chance that anyone knows where to get a replacement inner cone?

Secondly, one of my over pressure valves is missing. anyone know where to get a replacement, or come up with an alternate way to seal it? Maybe just a plug with the right threading? I was also thinking of just patching over it with 2-part hypalon glue and a d-ring patch.

Thanks in advance for any help! Looking forward to getting her out on the bay and in the pacific for some diving.

Sean
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Old 26 November 2013, 08:50   #27
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Have you tried to apply liquid wrench to the seized valve?

You probably won't find replacement parts anywhere but an authorized Zodiac dealer and they're not cheap. That's said I suggest you replace all the necessary parts and buy a new relief valve. Whatever you do don't patch over it. They're there for a reason.
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Old 26 November 2013, 10:08   #28
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On the seized valve, I'd bet that it's the cap/handle that's bent and not the actual brass cone since that part is quite heavy duty. Have you tried using a couple large flat bladed screwdrivers to pop the valve straight out? On mine that was the only way to get it to come loose. Just be careful what you pry against on the aluminum cap portion. I made sure to wedge the screwdrivers in against the sturdiest part of the handle right next to the brass material so as not to bend them. It took a bit of work to wiggle the screwdriver into place, and it wasn't until I got one on each side that it finally popped loose.
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Old 04 December 2013, 17:36   #29
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They will audibly leak air between the chambers if the pressures are unequal. The IC valves do not offer a perfect seal since there are no elastomer gaskets to seal the ports ; only brass-on-brass.

But, spray down the whole valve assembly with soapy water? One of mine is leaking around the entire valve...I need to get a huge spanner so I can yank the valve assembly and replace that neoprene gasket.

Also, replace your valve gaskets.
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Old 05 December 2013, 16:44   #30
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I finally got the brass cone out of the IC valve. Plenty of liquid wrench penetrating lubricant and a finally light application of heat broke it loose. It was just corroded in there good. Based on what I see with it, the PO dropped something on it or hammered away at it to get it out. So that the circle for the valve insert is now an oval and I can't screw the inner valve in.

I did find a source for a replacement IC valve body. They only want $777... Ha!!!!!! I think I'm going to take it to a machine shop and see if they can't do something. Maybe machine it out and install an insert that would hold the inner valve. It's got to be cheaper than $700.

I did clean the valve up and grease it. As long as I keep it in the navigate position, no air leaks out. It's usable, but not ideal.
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