WTF.....do I do...

how the hell do I drain the cooling system completey? can anyone walk me there it, pics would be awesome too......thank you

May I ask, what have you attempted to do? And possibly what year is your XJ?

Removing the bottom radiator to pump inlet hose is about as complete as you are likely to get. Maybe squeeze the top radiator hose together a couple of times and shake the heater hoses.

Drop lower hose as mentioned. Siphon the old fluid from the reservoir bottle as well. Good time to swap in new Jeep OEM 195 degree thermostat and flush the heater core with "moderate" water pressure if you're ambitious. Be sure when you are done that you have a final concentration of approximately 50-50. Verify with a coolant tester.

On almost all 4.0 blocks there is a block drian screw(plug if you will) on the drivers side.

Open the drain on the radiator, when that's finished pull the lower hose. If you still want to get even more out you could jack up the rear of the jeep and let it drain the rest.

pretty much pull the lower hose and jack up the rear of the jeep is the most you can do

where is the drain plug on the radiator??

Mine's on the passenger side (1989). Crappy plastic plug, 17mm I think.

Darklen said:

Mine's on the passenger side (1989). Crappy plastic plug, 17mm I think.

Click to expand...

Or a "wing nut" looking thing, depends on the year. The best way to get to the radiator drain is to remove the grill, its cake after that.

Don't bother with the drain on the radiator, more trouble than it's worth, just remove the lower hose and dump it into a 5 gallon bucker, actually one of those big oil change pans works out better, I keep a bright yellow one around just for coolant in case I am going to reuse it. To get the other stuff out disconnect the two heater hoses on the engine, drain the bottom one into a quart bottle, just blow thru the top one, then use a garden hose to push some water thru, alternate between the two and don't wedge the hose in there either, the cooling system is made to work at ~16PSI, most house hoses are upwards of 50 PSI or more, you just want to get water in a back and forth motion to loosen stuff up.