Snorkeling Anyone...? - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 02-27-2002, 07:59 PM
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Snorkeling Anyone...?

Axles. I have a CJ-7 with D-30 and AMC 20 Axles. And, as you all know, they have Vent Tubes. Someone was telling me that they have Vents that Screw into the top of the axle, that allow air to vent out, but keep water out. No Tube to rip off.

Have you guys heard of these? It's probably a common thing, but new to me.

If they do exist, what is the Correct name for them, and what companies can I buy them from?


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post #2 of (permalink) Old 02-27-2002, 08:35 PM
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Re: Snorkeling Anyone...?

Yep, they make them. I don't know exactly what they are called either, but I would stick with the hoses. I have heard that the "valve" type breathers can stick open or closed at times and that quick changes in temp, like driving with a warm diff. into cold water, can cause them to actually suck water in in some cases. Maybe someone will be able to explain this a little better than I did.


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post #3 of (permalink) Old 02-27-2002, 09:36 PM
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Re: Snorkeling Anyone...?

Yes they do exist, used on military 21/2 tons. In my experience I haven't seen too many suck in water but they do clog up and build up pressure leading to blown seals, sometimes when you pull a diff plug you can hear the pressure vent or the plug will pop back at you.


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post #4 of (permalink) Old 02-27-2002, 11:31 PM
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Re: Snorkeling Anyone...?

Why not just double the length of the original tubes and set them up so they don't rip off?

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post #5 of (permalink) Old 02-28-2002, 02:43 AM
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Re: Snorkeling Anyone...?

I've generally heard them called "check valves", and I stay the hell away from short breather tubes. I can show you the repair bills on my '95 Ranger from Ford's idea to use 2" breather tubes with cheap check valves that don't work. One of the big reasons I bought the High boy, then the jeep....

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