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Water Proofing Your Jeep

#1 User is offline   Rollbar 

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Posted 01 January 2007 - 03:40 PM

Basically, this will be organized into three sections. First, drive-train waterproofing. Second, basic engine waterproofing, not including ignition system. Third, ignition waterproofing, plus some easy, cheap, and functional upgrades that Jeep should have done in the first place (at least regarding the 4.2L six).

1. Vent tubes on the axles, trannies & T-cases-use a small 1" to 1 1/2" K&N filter & run the hose up into the engine compartment & tye-wrap/bolt them to the grill supports/firewall by the battery.

2. Carb-seal the bottom of the air cleaner housing where it meets the carb. On the 4.2L, an oil filter gasket is a perfect fit. It helps if you don't have any vacuum leaks anywhere & make sure you have a closed PCV system.

3. Plug wires-put a little bead of RTV inside the boots on both ends, & a little bit around the joint where the boot ends and the wire begins.

4. Dizzy cap-Accel and other aftermarket caps have an o-ring around the bottom of the cap, so if you have one of these, you probably don't even have to do it but if not run some silicone around the base of the dizzy cap & where the dizzy bolts down to the block, clean first with brake cleaner.

5. Dizzy improvement-if you have a '77 and up 4.2L, switch to the Ford 8MM two-piece distributor cap. This will help with the cross-fire problem. Then silicone the base & cap if need be (this cap has a flapper valve installed) if memory serves.

6. Get some silicone (or something that the military uses) spray and spray down everything else down. Make sure if you still have the computer (which I don't) you protect it as well.

Hope this helps.

Signed, chief waterproofing engineer for all US Navel Subs :whistle: :sneak: :boo:
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#2 User is offline   Jim B 

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  Posted 02 January 2007 - 07:52 AM

Good info. Did we have an old thread with more info on waterproofing a while back. :boo: Too lazy to do a search today.
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#3 User is offline   JeepinIan 

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Posted 02 January 2007 - 08:19 AM

I used a clear fuel filter for the vent tube from the axles and the tranny/t-case, and mounted it to the firewall as high as possible. I put the tube on the side that goes to the inside of the filter element, and pointed the open end down so it would not accumulate any water/dirt. I ran the front axle vent above the headlights and the rear I mounted the vent as high as possible inside the body behind the wheelwell.
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#4 User is offline   Rollbar 

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Posted 02 January 2007 - 12:38 PM

Jim B, on Jan 2 2007, 08:52 AM, said:

Did we have an old thread with more info on waterproofing a while back.

Not sure, all I did was post the M170 conversion pics of the vintage snorkle/air clearner I bought.
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#5 User is offline   Rollbar 

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Posted 02 January 2007 - 12:39 PM

JeepinIan, on Jan 2 2007, 09:19 AM, said:

I used a clear fuel filter for the vent tube from the axles and the tranny/t-case, and mounted it to the firewall as high as possible.

Excellent idea Ian, I like it & it will stop a lot of trash etc.
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