Join Date: Dec 2001
Location: Belleville, Illinois
Thanked 22 Times in 17 Posts
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.
Last edited by Jim_Lou; 02-26-2008 at 02:28 PM.