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post #1 of (permalink) Old 02-26-2008, 01:53 PM Thread Starter
 
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Water proof CJ7

Hey there guys, I have a CJ7 and Im building it up and Its gonna be getting into some water here and there, maybe deep water. I was wondering if there are any tricks to water proof my engine and anything else such as battery, alternator, switches, stereo speakers, everything? Thanks for your input, J.Shank
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post #2 of (permalink) Old 02-26-2008, 02:23 PM
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Lots. Seal and vent high anything water can damage. You need to decide how deep you want to go and get everything above that level. Here's what I did:

1 Put fittings in the distributor, axles, transmission and transfer case, connected them all to a common 1/2" tube and ran the tube to the air filter. Then I ran the intake tube for the air cleaner through the firewall above the battery. I also made a seal boot out of a CV joint boot for the transmission shift lever. That gets those items reasonable tight and immune from intrusion up to the top of the battery.

I also drilled and tapped the front hubs and put nipples in them so that they can be completely filled with grease. I machined a cover for the opening in the distributer where the vacuum advance link enters, and then sealed the cover and cap with Silicone grease. I replaced the cap with the Ford 300 cap and used the best silicone wires I could find. And I periodically treat the wires with silicone spray.

That still leaves a lot of vulnerable areas - everything in the primary electrical system - starter, alternator, blower motor, starter solenoid, ignition box, interior switches and instruments, light sockets and relays, and the fuel tank vent system.

Also the U-joints, ball joints, drum brakes, tie rod ends, steering pump are susceptible to damage from water and the crud that it brings along.

And you need to do something about the engine fan. If it cuts too deeply into water the resistance can bend the blades into the radiator or, at the least, throw a lot of spray around the engine compartment.

Even when well prepared, civilian Jeeps aren't happy in deep water. At the very least, your maintenance goes way up. You have to do a full grease job and check all lubricants for contamination after every outing. Low-voltage connectors corrode and quit working, and everything else electrical can take a dump immediately after immersion or days or weeks later.

You can forget about speakers, and anything to run them for that matter. There are waterproof generators, motors, starters and switches for military vehicles. If you really want to go nuts you might be able to adapt some of them.

EVERYTHING's easy for the guy who doesn't have to do it.
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Last edited by Jim_Lou; 02-26-2008 at 02:28 PM.
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post #3 of (permalink) Old 02-26-2008, 03:17 PM
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You can get marine speakers, but be prepared to open your wallet wide. Just get some plastic cones and be prepared to buy some every few years if they get submerged.

Oh, and do a search, this topic has been covered very well, with some very interesting solutions/ideas about positive air pressure by Junk Yard Genius.

Scott
1985 CJ7 T.H.O.R

"He brought me up out of the pit of destruction, out of the miry clay, And He set my feet upon a rock making my footsteps firm."
-Psalm 40:2
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post #4 of (permalink) Old 02-26-2008, 03:56 PM
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I would just stay out of water that deep.. No need to be there if you ask me..
3 1/2' is max for me. Anymore and its in the cab with me.

88 YJ SOA2.5" 2"BDY Locked F/R Chevy 4.3 NVG241OR 4.56's 36x12.50
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post #5 of (permalink) Old 02-26-2008, 11:19 PM
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I prefer rope caulk to silicone for the distributor. It stays pliable allowing you to remove and replace the dist if necesary without destroying the seal.

Is this the only hammer you've got?
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post #6 of (permalink) Old 02-27-2008, 05:46 AM
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Quote:
Originally Posted by jdoggmoney View Post
I prefer rope caulk to silicone for the distributor. It stays pliable allowing you to remove and replace the dist if necesary without destroying the seal.
Silicone grease is the consistency of wheel bearing grease, and stays that way.

EVERYTHING's easy for the guy who doesn't have to do it.
B. Dash Fabrication
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