Recently had my water pump (plastic) impeller eat itself up from using the wrong type of antifreeze for the last 2 years... Anyways long story short... I basically changed every component of my cooling system... EXCEPT FOR...dah dah daaaah... The heater core...

So a couple of days after replacing the overflow bottle, all hoses top to bottom, the radiator, water pump(bosch with metal impeller), thermostat, thermostat housing, new spark plugs, new Coils, flush and fill with G05 coolant, and a royal purple oil change...

I'm Driving down the road... And my car pops smoke... But not outside... Through the darn vents... Literally fogged up the whole windshield in an instant and gagged me pretty good too..

So to date I've changed my trans, transfer case, engine, entire rear end, entire front end, entire interior 3 times... Basically I've disassembled and reassembled everything except take the dash out/steering wheel off, etc...

Has anyone completely removed the dash to service the heater core/assembly? I bypassed it for now but it's Getting cold here... So Ive got to get to replacing it sooner than later... I figured I'd see if anyone had some tips... Book says 8 hours... I've read with experience you can cut that in half or better... I'm pretty handy but I'm nervous about this one...

I have done it on a XJ but not A Kj. I traded my 02 KJ in when I got The first hint the heater core was going to go out just so I did not have to do that again. Good luck.

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2003 KJ Renegade, 5 speed, frankenlifted,Al's a Arms 4.5,Moabs 245/75/16 BFG KM2's, custom rock rails, full Mopar skids, Hella ff220 lights,Hd cooling,Front DTT,Riddler diff cover,Rola safari rack,Cobra 29 peaked & tuned.

Pastafari Alum, Pink shovel recipient

You will have to have the AC evac'd also before you start the teardown as the AC lines must be disconnected to remove the HVAC box to change the heater core.