Waterproofing the Engine compartment. - JeepForum.com
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post #1 of 19 Old 03-07-2005, 10:46 AM Thread Starter
TJ_with_Tusks
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Waterproofing the Engine compartment.

Who s got a write-up on waterproofing the engine compartment? I've read articles online that say all you need to do is install a snorkel, and run a bead of silicon around the distributor cap, and you're good to go.

For some reason I don't believe this. I was thinking about getting one of those waterproof battery bosec for starters. anyone have one of those? Hows it working? The next step I figured was doing something with the fuse box.

I don't want to waterproof my engine compartment so I can go swimming with my TJ. Its more of a precaution. I want to do it because I know that between the mud, rivers, and other spots I choose to take my Jeep, eventually one will be too deep. I like not having to worry, you know?

JerseyDan


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post #2 of 19 Old 03-08-2005, 09:27 PM
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Quote:
Originally Posted by TJ_with_Tusks
Who s got a write-up on waterproofing the engine compartment? I've read articles online that say all you need to do is install a snorkel, and run a bead of silicon around the distributor cap, and you're good to go.

For some reason I don't believe this. I was thinking about getting one of those waterproof battery bosec for starters. anyone have one of those? Hows it working? The next step I figured was doing something with the fuse box.

I don't want to waterproof my engine compartment so I can go swimming with my TJ. Its more of a precaution. I want to do it because I know that between the mud, rivers, and other spots I choose to take my Jeep, eventually one will be too deep. I like not having to worry, you know?

JerseyDan
who ever told u that is a liar. there is so much stuff u have to do, i like ur idea, that being precautionary. if u do water proof the engine bay dont forget about the diff breathers

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post #3 of 19 Old 03-08-2005, 09:43 PM Thread Starter
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Oh yeah, What can you do with the diff breathers? Do you extend them up? What happens if you seal them up?

JerseyDan

04' Columbia TJ
33" BFG AT's, OME HD lift, front airbag suspension, teralow 4:1 kit & supershort shaft kit, TW CV shaft, 4.10 gears, JKS body lift, track bars and quicker disconects, Warn 9.5ti, warn front bumper, garvin wilderness rack, and solid cast aluminum tusks,
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post #4 of 19 Old 03-08-2005, 09:46 PM
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Quote:
Originally Posted by TJ_with_Tusks
Oh yeah, What can you do with the diff breathers? Do you extend them up? What happens if you seal them up?

JerseyDan
Do not seal them, just extend the hoses higher.

You can do things the right way or the wrong way.
Or you can do it MY way...which is like the wrong way, only faster.
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post #5 of 19 Old 03-08-2005, 11:00 PM
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do the tranny and the t-case breathers too while you're at it. as far as the engine goes, the snorkel is the biggest thing. water up the intake is your mortal enemy. electronics and components like the starter and alternator don't like water, but they'll survive a few splashes. the engine however can bend a couple rods on just 2 tbsp of the stuff. for electrical stuff, dielectric grease is your friend. be liberal in applying it to the plug wires and the coil wire terminals. this will help keep them dry and the engine running when they get wet. keep your wires in good condition. best way to check them is to wait for a dark night, pop the hood and take out the bulb. start the engine and look for little blue sparks. for sensor connections, use more grease on each half of the connections. then, take some liquid electrical tape, or my preference, friction tape (the rubber stuff not the kind with threads in it) and seal each connection nice and tight. I like friction tape because it's cheaper, less messy and it will seal to itself without leaving a sticky residue like normal electrical tape will. you already know about sealing the dist cap. make sure you know where the computer is as well. mines behind the dash in the cab, but i believe the newer jeeps have them in the engine bay on the firewall. i'm not sure how waterproof they are. HTH

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post #6 of 19 Old 03-09-2005, 10:08 PM Thread Starter
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thanks, that helps a lot. I didn't look in the Jeep yet, but where are the other breathers. I know the diff breather by the radiator. where are the others?

JerseyDan

04' Columbia TJ
33" BFG AT's, OME HD lift, front airbag suspension, teralow 4:1 kit & supershort shaft kit, TW CV shaft, 4.10 gears, JKS body lift, track bars and quicker disconects, Warn 9.5ti, warn front bumper, garvin wilderness rack, and solid cast aluminum tusks,
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post #7 of 19 Old 03-10-2005, 07:57 PM
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You have the rear diff breather that runs up to where the gas fill spout is. You have to remove the gas cap and the plastic piece that it attaches to first.
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post #8 of 19 Old 03-10-2005, 08:08 PM
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Quote:
Originally Posted by TJ_with_Tusks
thanks, that helps a lot. I didn't look in the Jeep yet, but where are the other breathers. I know the diff breather by the radiator. where are the others?

JerseyDan
i'm not sure about the TJ's, but the Yj has the tranny and case vents just below the inspection cover over the tranny. pull yours up and have a look.

RIP: '88 YJ 2.5L Ax-5 NP231
Posi-Loked. Herculined. Optima yellow top. 1" Shackle, 2" BDS. Cragar 397's Aussie front.

92 YJ 4.0L Ax-15 231
5" springs, 1" shackle 31's or 35's depending on my mood
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post #9 of 19 Old 03-17-2005, 07:41 AM
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What about the breather on your distributor cap? I just now thought about extending that, though I'm not sure if it's possible...I'll have to look at mine.
After stalling in water nearly up to my air filter, I realized the distributor was completely submerged (not waterproofed), so this is a more important concern than a snorkel IMO. I had decided not to enter water that could be that deep anymore, but I suppose an extended distr. vent would be a good idea just in case.

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post #10 of 19 Old 03-17-2005, 03:21 PM
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Quote:
Originally Posted by Scafone
What about the breather on your distributor cap? I just now thought about extending that, though I'm not sure if it's possible...I'll have to look at mine.
After stalling in water nearly up to my air filter, I realized the distributor was completely submerged (not waterproofed), so this is a more important concern than a snorkel IMO. I had decided not to enter water that could be that deep anymore, but I suppose an extended distr. vent would be a good idea just in case.
since he mentioned the cap in his original post i assumed he already knew about that one, but yes you should extend that one as well. you also need to silicone the bottom of it when you do. that along with the dielectric grease in the boots should keep you running even if it's under water.

RIP: '88 YJ 2.5L Ax-5 NP231
Posi-Loked. Herculined. Optima yellow top. 1" Shackle, 2" BDS. Cragar 397's Aussie front.

92 YJ 4.0L Ax-15 231
5" springs, 1" shackle 31's or 35's depending on my mood
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post #11 of 19 Old 03-17-2005, 06:30 PM
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Quote:
Originally Posted by TJ_with_Tusks
Oh yeah, What can you do with the diff breathers? Do you extend them up? What happens if you seal them up?

JerseyDan
you know what.... i don't know what happens if you seal them off.... anyone?

lj

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post #12 of 19 Old 03-17-2005, 07:00 PM
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Quote:
Originally Posted by LoneJeeper
you know what.... i don't know what happens if you seal them off.... anyone?

lj
i do. the expanding air in the diff finds the next easiest spot to push out, usually the axle seals and you end up with leaks. happened to a friend of mine who thought he knew better than the Dana engineers they're there for a reason guys

RIP: '88 YJ 2.5L Ax-5 NP231
Posi-Loked. Herculined. Optima yellow top. 1" Shackle, 2" BDS. Cragar 397's Aussie front.

92 YJ 4.0L Ax-15 231
5" springs, 1" shackle 31's or 35's depending on my mood
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post #13 of 19 Old 03-17-2005, 07:19 PM
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i'd sorta figured as much. thanks!

lj

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post #14 of 19 Old 03-20-2005, 02:33 PM
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This may not be waterproofing but it is taking a precaution, and electric fan. So you can shut it off when crossing water so you don't bend a blade and take out your radiator. This obviously would only be when you cross high water, not really if you drive through a puddle which would just splash water.

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post #15 of 19 Old 03-20-2005, 04:35 PM Thread Starter
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You mean install an eletric fan, instead of the stock clutch fan? Would the blades cut up the rad. is you were in deep water ?

JerseyDan

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33" BFG AT's, OME HD lift, front airbag suspension, teralow 4:1 kit & supershort shaft kit, TW CV shaft, 4.10 gears, JKS body lift, track bars and quicker disconects, Warn 9.5ti, warn front bumper, garvin wilderness rack, and solid cast aluminum tusks,
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