m2bandit

I've thought about it, it's never really had a home thread. There's just so much to cover. I might if I get bored.

Ac is on hold until I finish with the steeringbox/pump since It's really easy to get to right now. Today I deleted the C101 I highly recommend doing this one wire at a time and paying attention to which ports they come from. Some change colors, some terminate in the connector. No sense in leaving room for error. I'm surprised anything connected through this mess.

The rockauto ones are listed from 80-90 the jeepairs are listed as 91+ though I've seen them posted here as fitting renix. I'm not a huge fan of going blindly off forum posts but we'll see.

I purchased an 89 parts xj from what I've read in other AC posts Evap cores for MJs are impossible to find. The Heater box fit right in but the but the evap core didn't quite fit I had to cut away some of the plastic the hoses pass through and cut the foam seal. The hoses on the evap core are vertical instead of angled like stock jeeps. Also the AC switch probe has a hole for it on the stock core the replacement does not. I wrapped it around the side and pushed it through the middle. Not really too much to talk about here, I'll need a vacuum diagram or maybe I'll just go to the JY since my MJ didn't have the vacuum reservoir I need to know where things go. Other than that there's a crap load of wiring to deal with.

AC Swap I’ve looked thoroughly through the AC and non AC systems. The only thing Jeep left of any use in my non AC MJ was the hole drilled in the relay bracket for the AC relay. If you’re looking at doing this I’d swap the entire wiring from an AC’d XJ ( MJ Evap cores are different). There’s about a foot of AC wires on the engine side of the chassis harness before it terminates, these wires have nothing to connect to on the interior side of the c100/fuse block so it’s pretty worthless. AC Parts List Rock Auto UAC EX9449C Expansion Valve $9.89 UAC HA11332C Suction Hose with muffler (compressor to evap) $27.79 UAC HA111331 Discharge Line (High Pressure: Compressor to Condenser $18.87 UAC RD9086C Drier $13.50 26758 Four seasons Oring set $5.69 Optional-ish 93024 Heater Core Spectra Premium 30.79 Jeepair.com Cherokee Liquid Line Drier to Condenser 27-5551 1 $43.99 Cherokee Liquid Line Drier to Evaporator 27-5552 1 $39.99 Amazon UAC EV 4177ATC A/C Evaporator Core 70.00 Spectra Premium 7-4173 A/C Condenser for Jeep Cherokee $77.57 Four Seasons 58580 Compressor with Clutch $175.00 RedTek oil $15 RedTek refrigerant (formerly known as R12A) $30.00 Total $529

The only thing stock on my XJ is the trans. I'll post a little on it before moving on with the MJ. 87 XJ 2door, 4.6L, aw4, Atlas 2, D60 ARB , 10.5 Detroit, 5.38's, 41" Iroks, 14" swayaway coil overs, Hydroboost brakes, PSC pump/box , Nickintime REM sensor monitor (Can't stress how essential this is), stuff. Here's the stroker parts list for anyone interested https://docs.google.com/spreadsheets/d/1xTunJzocDmT51AIPQOVKN-plp82W3o7mqS9_Ko1n_K8/edit?usp=sharing

I’ve owned my XJ since I was 18 and always wanted an MJ, 16 years later I’ve finally purchased one. The MJ will be a mall crawler only I won't do anything more than some logging roads. I have the XJ for rocks. The truck didn’t look horrible but maintenance wise it has been neglected. Previous owner put a full traction lift and fox shocks on it before I bought it. My initial plan was to swap in AC from a parts XJ and paint it. As I’ve progressed I’ve ran into a number of issues. PO stuck an antenna through the roof and never sealed it which caused floorboards to rust out. -FIXED Page 1 Clutch MC was leaking which caused more floorboard rot, surprisingly no visible damage to the fuse block but I’m replacing it anyway. --FIXED Page 1 Power steering pump is toast, PS box leaks like a sieve -FIXED Tcase output seal - Fixed Page 1 Motor mounts trans mount- Fixed Page 1 Chassis wiring harness had melt spots -FIXED Page 1 Interior wiring harness was cut up/ ghetto wired in multiple spots. - FIXED Page 1 Radiator reservoir (all metal) was smashed in on one side. - Fixed Page 1 Remove ghetto Pushbutton Start - FIXED Speedometer cable - Fixed Battery mount was broken, bolts were rotted out.- Fixed Page 2 In addition to fixing these issues I’ll also be swapping to HO open cooling eliminating c101 --- DONE Page 1 and upgrading the headlight harness. --DONE Page 1 Welding a Dirtbound DIY Rear Bumper -- Done Page 2

I was thinking about putting that together, I'll see if I can get to it today.

It's a pretty large project, I'm in the middle of it myself. Probably $500 in new AC parts and $200 in a parts jeep for the heater box and wiring. It can be done cheaper if you trust the rubber on 30 year old hoses. There's also the condenser and evap core that are parallel flow now instead of serpentine. You can also skip the heater core if you want to risk having to pull everything in the future. Personally I wanted a system that worked well and I wouldn't have to recharge because parts jeep parts didn't work. Might aswell get a parts jeep and swap everything to a 4.0.

On my XJ I went from stock to 4 electric fans back to Stock aux fan and a taurus fan, then back to the stock fan with a clutch eliminator and aux fan. It keeps my stroker cool all day wheeling hard. The taurus fan was pretty good but took a ton of juice and took a lot of work to fit it well. Over the years I've grown to appreciate the reliability of a mechanical fan on a well maintained cooling system. If I was you I'd get the fan shroud, I don't know why I never see xj's/mj's with fan shrouds but they're always complaining about cooling. get that HO tstat housing and put a 3/8's NPT Pet C0ck (drain C0ck, drain valve) to help with burping. Note: my XJ is a rock crawler only I wouldn't recommend a clutch eliminator on a daily driver, just get a functional fan. Pet C0ck, and drain c0ck are the actual names of the valve... the parts store/hardware store will likely have the same reaction as this forum's censor when you ask about them.

yeah I thought the same Just wanted to correct green and black terminates 6" after c100 so a small portion is there. It's not on the interior c100 so you'd have to get those connectors and add it. Also the Heater control wiring is a different style plug. Non AC is a flat blade of plugs with only 2 wires Ac is a square connector with 4-5.

I just confirmed there's no wiring at all for the AC and no AC relay.

I just pulled everything from a donor and compared my harness. There is absolutely no AC related wiring in my 88 Chief. In the donor there's a green and black wire. It goes to a few places starting at the AC control switch but ends up at the ECU. Most likely for the idle up.

I figured I'd take the whole thing and get rid of the c101 too.

Great so I can just slap the 89 engine side in there and I'm good to go? Yeah just like this

C100, the bulkhead connector. The large one that connects engine compartment wiring to interior wiring.

I'm trying to put AC in my 88 MJ I have the C100 diagram for my parts jeep (89 xj) and I want to make sure it's compatible. I have the 88 mj electrical trouble shooting manual but it doesn't show the c100 connections.