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Thread: 2004 WJ Project

  1. #1
    Caught the Bug DVLDOG's Avatar
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    2004 WJ Project

    So, I thought I had a solid daily driver in my recent purchase of this WJ, and come to find out that the Jeep gods have given me a project.

    Just got back from the shop in which I had them do a purchase inspection and this is the list I get to work on over the next few months (at the discretion of the money gods):

    • Bank 1 Cat is bad (the shop doesn't have the ability to wield a new one in and the muffler shop they work with cant either.)
    • Both Valve cover gaskets are leaking
    • Timing cover leaks
    • Power Steering pump leaks
    • Oil pan leaks
    • Passenger side Diff bushing is cracked
    • Passenger side Axle shaft boot is torn
    • Passenger side air is not blowing as hard as the driver side
    • Front pads and rotors (passenger side is the worst)
    • T-Case may be leaking but it also may be from the other leaks


    Any words of wisdom or tips would be very appreciated.

  2. #2
    Meme King WJCO's Avatar
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    Quote Originally Posted by DVLDOG View Post
    So, I thought I had a solid daily driver in my recent purchase of this WJ, and come to find out that the Jeep gods have given me a project.

    Just got back from the shop in which I had them do a purchase inspection and this is the list I get to work on over the next few months (at the discretion of the money gods):

    • Bank 1 Cat is bad (the shop doesn't have the ability to wield a new one in and the muffler shop they work with cant either.)
    • Both Valve cover gaskets are leaking
    • Timing cover leaks
    • Power Steering pump leaks
    • Oil pan leaks
    • Passenger side Diff bushing is cracked
    • Passenger side Axle shaft boot is torn
    • Passenger side air is not blowing as hard as the driver side
    • Front pads and rotors (passenger side is the worst)
    • T-Case may be leaking but it also may be from the other leaks


    Any words of wisdom or tips would be very appreciated.

    • Bank 1 Cat is bad (the shop doesn't have the ability to wield a new one in and the muffler shop they work with cant either.)
      Is it setting a code? Have you taken it in for emissions yet and did it pass?
    • Both Valve cover gaskets are leaking
      So are mine. 160k on mine. They're not dripping on the ground so I'm just keeping an eye on them. Passenger side looks like a bitch.
    • Timing cover leaks
      How bad is the leak? Are noticing fluid on the ground?
    • Power Steering pump leaks
    • Oil pan leaks
      How bad? Upload a picture of the leaks.
    • Passenger side Diff bushing is cracked
      If it's not flexing or causing movement, leave it for now, these are a bitch to do on the Jeep. Good time for an axle swap See if you can upload a picture of that as well.
    • Passenger side Axle shaft boot is torn
      Definitely get this one done so you have 4x4. Eventually the joint will where out. Replace the axle with a new one regardless, I wouldn't waste the time doing just the boot.
    • Passenger side air is not blowing as hard as the driver side
      This could be a lot of issues. If you can live with it, I would, otherwise dash may have to come out. Sometimes by disconnecting the battery and reconnecting it, you can reset the HVAC module memory and it may work properly.
    • Front pads and rotors (passenger side is the worst)
      Definitely get this done, if brakes are down below 30%. Cheap and easy.
    • T-Case may be leaking but it also may be from the other leaks
      Take a picture as well. I can probably help you identify it as I've had at least 2 leaks back there. Repaired with FlexSeal or updated snapring plug.



    Are you planning on doing this yourself or paying a shop to do it? Keeping up on an older vehicle can cost you some money. If you can live with some of these things, it may not need to be repaired immediately. Are any of the leaks dripping on the ground?
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  3. #3
    Caught the Bug DVLDOG's Avatar
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    Thanks WJCO for the help.

    I am seeing the P0420 code and it is steady and I have not tried emissions yet. Don't they kick you to the curb if you have any warning lights on now? I heard they just plug into the vehicle and pull the codes instead of running it on the dyno.

    In truth I am not seeing a lot of leakage on the ground....the PO did say he was going through oil a bit faster every 3k. Now I know why. All the areas show fresh oil. I will try to get some pics later.

    It is driving great so far. I can live with anything that will not make the issue worse by doing so. It can also sit in the driveway if needed. I have my 88 Electra Glide to ride to work if I have to.
    2004 Grand Cherokee Limited, 4.7 L, Graphite Metallic, Stock
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  4. #4
    Meme King WJCO's Avatar
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    Quote Originally Posted by DVLDOG View Post
    Thanks WJCO for the help.

    I am seeing the P0420 code and it is steady and I have not tried emissions yet. Don't they kick you to the curb if you have any warning lights on now? I heard they just plug into the vehicle and pull the codes instead of running it on the dyno.

    In truth I am not seeing a lot of leakage on the ground....the PO did say he was going through oil a bit faster every 3k. Now I know why. All the areas show fresh oil. I will try to get some pics later.

    It is driving great so far. I can live with anything that will not make the issue worse by doing so. It can also sit in the driveway if needed. I have my 88 Electra Glide to ride to work if I have to.
    Yeah, a steady 420 code will likely fail. I would look around for a shop that will weld in an aftermarket cat. A lot of shops will do that. Now some of the WJs had 2 cats up by engine depending on Federal vs California emissions and those are harder to replace. But if you have the single cat down by the muffler, that's easy for a shop to replace. I did mine with an aftermarket (for clearance), I may even have the old cat lying around if you want, if you have the same style. As far as the oil leaks, just keep an eye on the level and watch it.

    Here's how I did my exhaust, cat is easy to get to:

    IMG_20170120_144101_516.jpg

    IMG_20170120_144231_695.jpg
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  5. #5
    Caught the Bug DVLDOG's Avatar
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    Yeah...I have the two cat version....is it possible to switch to a single? They are also welded in and the two shops already told me they are not setup to do it. A new replacement is $713 with labor comes to $933.00...I can let two of my four kids not eat for a week, but not all four for that cost LOL.
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  6. #6
    Meme King WJCO's Avatar
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    Quote Originally Posted by DVLDOG View Post
    Yeah...I have the two cat version....is it possible to switch to a single? They are also welded in and the two shops already told me they are not setup to do it. A new replacement is $713 with labor comes to $933.00...I can let two of my four kids not eat for a week, but not all four for that cost LOL.
    Theoretically, one cat is plenty, but the eco-nazis don't see it that way. If you decide to attempt it, do your research as there are certain laws that have to be followed with how they have to be replaced in the same spots, etc. The other issue you'll run into is that you likely have more o2 sensors with your current set up, and those all have to send data to the pcm, so it may not be worth it in the long run. I would highly recommend searching some online junkyards or eBay for a used replacement pipe that has the cats in it. Go with a junkyard that has good reviews and you're likely to get a good working part.

    Just did a quick eBay search, lots of options. Here's a really cheap one all set up with cats and o2 bungs. Make sure you get the correct one though.

    Untitled.jpg
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  7. #7
    Caught the Bug DVLDOG's Avatar
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    Thanks WJCO...that is a good start. Do you have any recommended yards in the area that are good to hit?
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  8. #8
    Meme King WJCO's Avatar
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    Quote Originally Posted by DVLDOG View Post
    Thanks WJCO...that is a good start. Do you have any recommended yards in the area that are good to hit?
    I haven't been to a local yard in years. Especially now that online shopping is so available and I work from a fricken desk all the time. I know there's a big one in Denver/Englewood off of Santa Fe.
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  9. #9
    Caught the Bug DVLDOG's Avatar
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    I'm at the desk all the time also....feel your pain :-)

    Thanks for the assist, we should get together some time for a beer or other beverage. I am 15 mins from Boulder.
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  10. #10
    Meme King WJCO's Avatar
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    Quote Originally Posted by DVLDOG View Post
    I'm at the desk all the time also....feel your pain :-)

    Thanks for the assist, we should get together some time for a beer or other beverage. I am 15 mins from Boulder.
    Definitely! Beer is always good.
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