prestone makes a handy little kit that you can get at napa/autozone for like 8 shingles.
it has a T fitting that you install into one of your heater hoses (sort of a tight squeeze on the V8)so that you can hook up a regular garden hose.
then you hook up the hose, run the engine with the heater on full blast, open up the radiator cap and let the water flow out until its clean.
then take off the hose, drain the water out of the radiator, open the bleeder and start filling with new mixed coolant, when coolant comes out of the bleeder and your new T fitting (meaning the water has been displaced out of the system, close them up. fill the reservoir.
idle for a while w/ heat on. check level in radiator and add as necessary (with egine off and cool obviously).
dont do this near the lawn. antifreeze will kill the grass. i discovered this the hard way.
-2005 WK 5.7 Limited [DD]
-1999 WJ 4.7 Limited [SOLD]
-1998 ZJ 5.9 Limited [SOLD]
-1996 ZJ 5.2 Laredo [SOLD]
-1994 ZJ 4.0 Laredo [SOLD]
-1993 XJ 2.5 [SOLD]