2002 WJ Grand Cherokee "CrackaJack" Build Thread

studflucker

New member
I own a '96 Land Rover Discovery (for sale now) for several months and was going to make that into my overlanding vehicle. I love the Discovery but the parts availability and pricing prompted me to purchase something a little more common to the US. After several months of perilously trying to find parts just to get the Discovery to a reliable point, never mind any upgrades, enter my 2002 WJ Jeep Grand Cherokee. Luckily I didn't pour a bunch of money into the Land Rover before abandoning that as my expedition project.

I picked her up earlier this year for $3,500 with the 4.7 V8, nv242hd, with about 178,000 miles on the clock. Fortunately, I was able to find this particular one that had just had the motor completely rebuilt three months prior to me purchasing it. PO did have paper work detailing such and it was obvious from the motor mounts all being recently cleaned that the rebuild actually did take place.

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Nothing too special, Vehicle had a couple dings here and there but overall good shape. There is very little rust on the underside, but the kicker panels are the worst, not anything too far gone to fix however. Overall I'm pleased with the vehicle.

My Goals
My plans for the WJ are to build a vehicle with the ability to self sustain for a week or longer without common services. Obviously, that won't happen immediately although I'd like to think I'll be to that point in a year or little more. The vehicle needs to be competent offroading but I don't want a rock crawler by any means. The WJ will maintain its use as an every other day kind of daily driver. This also means that MOST work on it will fall during weekends and in a timely fashion that I have a reasonable expectation to be completed prior to the next day I have to be to work!

This thread will be my main source for the build as I plan on using it in an "expedition" role; to go anywhere from the overnight trip to the lake an hour up the road, and hopefully all the way to the TAT and even abroad someday! I will however be posting on other Jeep Forums and will update with those links as well once they transpire.

About Me

I'm currently live in Kansas, am 27 years of age and work as a branch manager for an equipment rental company. I have enjoyed mechanics ever since I was old enough to pick up a wrench. I enjoy and have owned dirt bikes, crotch rockets, enduros, slow cars, fast cars, lowered trucks (currently one of my other projects), scooters etc... you name it. I breached into the offroading scene, not because I wanted to have the tallest truck with the biggest wheels, but because I really love the idea of going into remote areas, being self sufficient, and completely secluded from anywhere between overnight and up to 2 weeks at a time.

This build will be slow. I am working on a somewhat tight budget although nothing will be sacrificed due to funds. I will either save up to afford the better option or live without. I don't like to cut corners unnecessarily. That being said I prefer to do ALL my own work, short of balancing tires and alignments; oh and differential work. I don't care to waste money on r&p gears hoping i get backlash and preload all set correctly. That also means I will, within certain parameters, prefer to fab something of my own. Obviously, if I can reasonably expect to do it cheaper, better, or in a shorter time frame than paying for an equal or lesser option. Of course, that being said I am in no way perfect. If anyone here sees something that I am doing wrong or simply could do better I'd really appreciate the feedback and take it whole heartedly. "If you're learning, you're not losing."

My other constraint is time. I can't remember the last time, disregarding vacation, that I worked less than 55 hours in a week. So weekends and evenings are my only time to work. Of course, I've been working where I work for a while now so I am afforded the luxury of having 4 weeks a year of vacation to do larger projects and expeditious trips. Our first trip is set for Arkansas in late October. Should be a timeframe in which I am comfortable with my vehicles abilities by then, however, I am prepared to wait until the first part of next Spring if things don't pan out.

So of course the first thing I did once I got the Jeep home is changed all the fluids and thoroughly checked everything out. All seemed well so I drove it around as much as possible to have any problems come out of the woodworks.

I noticed a weird "crackling" noise when I would turn the AC compressor on. It sounded like light radio static over a speaker. I did some research and found that I was low on refrigerant, topped that off and was good to go.

It was only a week later I noticed some wetness in the passenger floorboard. Of course it was the heater core. I'm positive it was that way when I bought it, I don't think the PO necessarily knew about it, but my suspicions are high.
I went down to the local Jeep dealer and that weekend got to work!

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This is gonna require some Liquid Motivation!

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Went ahead and did the tweeter speakers while I was at it
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Dash out
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HVAC housing out
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Out with the old in with the new
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Got it all back together. It took me longer to do this than to lift the Jeep (more on that later) I did take my time and did it right, and the work isn't hard; it's just painstaking and time consuming. Of course I had to do this a week and a half after topping of my refrigerant. So I had to go back out and buy more to fill it back up. Not only a couple days later I noticed my AC freezing up, so despite my best efforts to keep the AC lines free from the atmosphere I had to drain the whole system. Luckily, I have a co-worker who used to do HVAC work and he had the vacuum setup to evacuate the whole system of moisture and air. After that, filled up with refrigerant for the THIRD TIME (man this is getting expensive) and everything has worked awesome since then. If anyone wants more pictures or has any questions about the dash removal I have quite a few, just wanted to hit the main points to keep this thread about what it's about!

I will get onto the lift next. stay tuned
 
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jpat30

Adventurer
Welcome to the Portal and nice score on the WJ. Always glad to see another one pop up around here. With a little work, they make a really nice DD/ Weekend Explorer.
 

Capercrew02

Observer
Welcome to the portal! I've got a wj myself. Love the pics and looking forwArd to following your build. I've been contemplating pulling my dash because my hvac blowing very poorly and suspect I have a leak. These pictures perfectly lay out the hvac system so thanks!
 

K2ZJ

Explorer
Welcome to the portal! I've got a wj myself. Love the pics and looking forwArd to following your build. I've been contemplating pulling my dash because my hvac blowing very poorly and suspect I have a leak. These pictures perfectly lay out the hvac system so thanks!

Have you checked your blend doors? Common problem on WJs.
 

Capercrew02

Observer
K2zj yeah I should have posted, the blend doors were the first thing I did, they were bad, but I repaired them all, they work perfect. It's the actual air volume that's off, my drivers vents are 2-3x more powerful than the passenger, and that doesn't fair well with the wife :/
 

studflucker

New member
Sorry it's been a while since posting. Although I doubt any of you were holding your breath!

Got the 3" lift on a couple months ago.

Before:
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After:
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Getting started

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Some how I managed to dodge all the rain that day. unfortunately, the ground was still pretty wet.
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I woke up early to get a head start and it was still raining. It finally let up after about half an hour, which worked out just lining up tools and all the parts etc... After I was done. I pulled the jeep out of the driveway to turn it around and finish up for the night and it started raining no more than 10 minutes after I finished. So great timing all the way around.

Found out that my front spring perches were in pretty bad shape. I sanded most the rust off and painted them up. I do plan on rebuilding those perches completely the next time i'm working in the vicinity.
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While I was at it I did all new control arms up front, steering dampener, all 4 tie rod ends, and isolators.
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I did run into my fair share of problems, but overall it installed without too much fuss.

Next I am going to start tackling some smaller items, electrical, dual batt, roof rack and some others. I definitely will be posting updates more frequently as I compile parts and other fun stuff
 
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Capercrew02

Observer
Always glad to welcome another wj to the site! Looking forward to follow your build. Especially keen on if you find a fix for the hvac airflow, mine has the same problem, which means I also have the same problem with my wife complaining :/
 

studflucker

New member
Got some other stuff done necessary to the safe operation of said WJ

First and foremost was the rear passenger axle shaft. Upon rotating the tires this oil change I noticed that ALL of the 5 lug bolts were loose.

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Once I got the rotor off finally.

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Slide hammer in place ready to do work!

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Out with the old!!! In with the new!!!!

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If any one has any question to which axle shaft to order mine was part # 16530.72

This was passenger side axle shaft for non varilok (open diff) axle.
 
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malibubts

Adventurer
Nice looking WJ. I used to have an 02 and it was a great vehicle. Good score on the V8 with the Selec-Trac, those are pretty rare! Glad to see you already took care of the blend doors. One thing to keep an eye out on the V8 is to make sure you don't overheat. The heads and the blocks are different materials and you can easily blow a head gasket.

Sent from my SM-N900P using Tapatalk
 

studflucker

New member
Nice looking WJ. I used to have an 02 and it was a great vehicle. Good score on the V8 with the Selec-Trac, those are pretty rare! Glad to see you already took care of the blend doors. One thing to keep an eye out on the V8 is to make sure you don't overheat. The heads and the blocks are different materials and you can easily blow a head gasket.

Sent from my SM-N900P using Tapatalk

Yeah, I've read alot about these V8s and there weakness during an overheat not being all iron. I really was drawn towards this particular WJ (so much that I drove 6 hours one way to pick it up) due to the V8, selec-trac, and the fact that the PO had just had the motor completely rebuilt with documentation. So I was fairly confident that this motor was going to be good to go for quite some time. I also could not find any signs of overheating, compression tested out all good.

That being said, I'm not overly concerned if for some reason this motor doesn't last simply because I've had my eye on a 4.7 at my local pick your part lot that I intend to buy and then build up to be a good amount more powerful than they are stock. I'm not looking to make 700 hp out of it, I would just like to have about ~300-350. This gives me the ability to build the motor the way I want without worrying about time as this WJ is my daily driver. I do have my KLR to get me to work and back, but that's not very fun in the winter.
 

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