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  #121  
Old 03-18-2019
adriaanvn99 adriaanvn99 is offline
(Adriaan) (ZS1AVN)
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Join Date: Dec 2017
Location: Phoenix, AZ
Vehicle: 1998 Jeep Cherokee XJ Limited
Posts: 137
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Default Re: 1998 Jeep Cherokee XJ Build
I have been busy with a number of smaller projects on the XJ over the last few weeks. The biggest upgrade which was done is that I finally regeared to 4.56 Yukon gears and swapped in my Chrysler 8.25 rear. Andrew at LetzRoll Offroad did a great job of regearing my axles and installing a SYE in the NP242 with a new Adam's driveshaft. I finished the break in period and of course had to go try it out! Headed up to Broken Arrow trail over the weekend and I am very pleased with the performance. A quick comparison; on the 3.55's I was at 2850 rpm at 65 mph, with the 4.56 I am cruising at 2050 rpm at 65 mph. The biggest difference for me is the off road performance... 4 Low is totally in proportion now and I hardly have to give throttle over an obstacle which is great! Everything is smooth as butter! The factory LSD also made a major improvement traction wise off road. I will still eventually like to upgrade to ARB selectable lockers front and rear

I recently bought the Engel MR-040 fridge freezer. I have always been loyal to Engel as they make a great product and are well known in the industry. I needed a quick way to mount it, so I bought the Engel transit-lock slide along with it. Its quite a neat setup which allows you to slide the fridge into place and it keeps it nice and secure. Of course, I needed a platform to mount this too so I made a rear platform out of 1/2 inch Birchwood ply. It turned out great and serves a good job of keeping the fridge secure. I added some tie down points to secure my Wolfpack boxes to. I like that I still have easy access to my Hi-Lift and compressor on the driver side. I will eventually upgrade to a more complete system such as the ARB drawer system and drop down fridge slide, but this serves my needs for now!

Another major replacement was my timing chain, rear main seal, oil pump and oil pan gasket. This was quite a big job but I am relieved it was done. The XJ was leaking pretty badly from the RMS and oil pan gasket. My timing chain was so stretched that it had completely destroyed the rubber isolator in the timing chain cover. Luckily all went well and I have not run into any major issues yet!

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  #122  
Old 03-19-2019
dzJeepChic's Avatar
dzJeepChic dzJeepChic is offline
(Diane) (KD7JPC)
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Default Re: 1998 Jeep Cherokee XJ Build
Wow, that's a lot of projects! The Jeep is looking good, and sounds like it runs a lot better too. Nice write up and pictures, thanks for sharing!
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  #123  
Old 03-19-2019
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scottL scottL is offline
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Location: phoenix, az usa
Vehicle: 2001 jeep cherokee
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Default Re: 1998 Jeep Cherokee XJ Build
Looking good double A!


Really liking your hi lift cover too. Might have to pick one up for myself..
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  #124  
Old 04-12-2019
adriaanvn99 adriaanvn99 is offline
(Adriaan) (ZS1AVN)
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Vehicle: 1998 Jeep Cherokee XJ Limited
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Default Re: 1998 Jeep Cherokee XJ Build
The XJ has had a cracked header for a while now, and finally got to replacing the whole exhaust system. Whilst at it, I decided to do the 99-01 horseshoe intake swap. I got the intake manifold from DeadJeeps on eBay and then got it media blasted and Cerakoted by AZ Pro Strip in Mesa. It turned out real nice. I added the DEI insulation kit over the fuel rail and and intake shield to prevent any heatsoak issues. Full exhaust replacement with a Magnaflow high flow cat and muffler. I decided to have everything welded in by a guy close by, called Wicked Wrench. The 4.0 is breathing a lot happier now!

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  #125  
Old 04-12-2019
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theksmith theksmith is online now
(Kristoffer) (K1KRS)
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Default Re: 1998 Jeep Cherokee XJ Build
very nice!

ScottL should install that insulation kit too - is this the one you used: https://amzn.to/2GdT7q3
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  #126  
Old 04-12-2019
adriaanvn99 adriaanvn99 is offline
(Adriaan) (ZS1AVN)
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Default Re: 1998 Jeep Cherokee XJ Build
Originally Posted by theksmith View Post
very nice!

ScottL should install that insulation kit too - is this the one you used: https://amzn.to/2GdT7q3
Thanks Kris! Yes that’s exactly the kit I got, also through Amazon.

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Here’s a better shot of the Cerakote. This is the “titanium”. They offer black and silver too

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  #127  
Old 04-22-2019
adriaanvn99 adriaanvn99 is offline
(Adriaan) (ZS1AVN)
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Default Re: 1998 Jeep Cherokee XJ Build
The XJ's 4.0 has been defeated! After clocking 270 000 miles, the 4.0 failed on my way to EJS in Moab. I was traveling up the i17 N when I had a sudden loss of power. Pulled over and shut off, and I when I started it up again I had very hard knock coming from my top end. I creeped my way back to Sedona and rented a UHaul to tow it back to Phoenix.

My first step was a compression test, which yielded no obvious signs. All cylinders were within spec (between 120-150 Psi) and the oil looked fairly normal. I am assuming I have a bent push rod from a collapsed lifter. I picked up a donor 1998 engine with 160 000 miles on it and will start a full teardown of it.

I contacted Russ Pottenger from Bishop Beuhl Racing engines and he is putting together a full kit for me. Will be a pretty mild 'mini stroker'. The specs will be something along the lines of this:

AMC 232 3.500" stroke crank
Jeep 4.0L 6.125" rods
Silvolite UEM-2229 +0.060" bore pistons
10.1:1 CR
CompCams #68-235-4 210/218 degree camshaft
Custom Ported HO 1.91"/1.50" cylinder head
Mopar 0.043" head gasket
0.040" quench height
Ford 24lb/hr injectors for '96-'04 engines
Hesco High Flow Thermostat Housing
Flowkooler High Flow water pump
Banks Revolver header
62mm Throttle Body

270hp @ 5300rpm, 306lbft @ 4000rpm

Pretty excited to be getting this project under way!

I did manage to get one night of camping in though which made it a little more worthwhile!
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Last edited by adriaanvn99; 04-22-2019 at 04:20 PM.
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  #128  
Old 04-22-2019
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theksmith theksmith is online now
(Kristoffer) (K1KRS)
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Default Re: 1998 Jeep Cherokee XJ Build
dude, that's a bummer. sorry to hear this... but you've got a great attitude about it - seeing an opportunity in the chaos!
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  #129  
Old 04-22-2019
adriaanvn99 adriaanvn99 is offline
(Adriaan) (ZS1AVN)
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Vehicle: 1998 Jeep Cherokee XJ Limited
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Default Re: 1998 Jeep Cherokee XJ Build
Originally Posted by theksmith View Post
dude, that's a bummer. sorry to hear this... but you've got a great attitude about it - seeing an opportunity in the chaos!
Thanks man! Was bound to happen with the high milage, but excited to take this as a learning opportunity. Building engines is always fun
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  #130  
Old 04-23-2019
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dzJeepChic dzJeepChic is offline
(Diane) (KD7JPC)
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Default Re: 1998 Jeep Cherokee XJ Build
I agree! Great attitude in a sucky situation. Best of everything with the new engine install!
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