Originally Posted by Mike1998XJ

I just flushed out the heater core on my Daughters Cherokee last night. I've done this a few times. The heater cores are a place where crap gets stuck.... In my opinion that's a good place to start. If you do that you don't even need to burp the cooling system.
Just take the 2 small hoses off that lead to the heater core near the thermostat. Flush water with a hose through the long one, then the short one. Then repeat until you see a nice flow coming out. Reinstall the hoses, start the Jeep and turn it on defrost with the fan on high. Let it run until the thermostat opens and you should have good heat. You may need to add a little coolant to the overflow tank after this.
And don't let your pets drink the antifreeze if you spill any!

Originally Posted by fishtaconc

Sorry to jinx ya, ive never had any luck with them, on another note the sell a barb to female garden hose adapter like someone suggested earlier you use this by taking the hoses loose put the barb in.

Originally Posted by fishtaconc

Just a thought when you flush do not be tempted to install those flush tees they lead to problems down the road.