Would that be the same for the jeep then?

How do I "run" water through it? Poor some in and stick an air compressor to the end?

Could I pull the hoses off that right on the heater core? Or should I pull them off at the firewall?

 

The very first thing you need to do is make sure the radiator and overflow tank are full, and have the proper anti-freeze mix. Everything else is a waste of time until you do that. Without the proper amount of fluid, your heater core becomes a big air bag, and you get no heat in the cab of the truck. The heater core is most likely the highest place in the coolant system, air rises in water. Fart in the bathtub and you'll know what I mean.

Wait 15-20 minutes after she drives the truck for 15-20 mintues. Use a rag and take the radiaotr cap off, slowely. It should spew forth some anti-freeze, let it. DOnt let the dog drink it. Is it full? Add a 50/50 mix until full. Now start the truck up and crank the heat to full blast. Go see if the radiator is still full. Add 50/50 mix until it is full.

Find the heater core hoses, they will go through the firewall on the passengers side. See if they are both warm. If so your heater core is not plugged. Put hte radiator cap back on, and go for a test drive.

Come home and let it cool for another 20 mintues. Pop the radiaotr cap off and see if she is still full. Test the coolant mix to see if it is right for your neck of the woods. The back of the anti-freeze bottle has the recommneded mix on it. Coolant testeers are cheap at most autoparts stores. Pick one up on your test drive.


Too verify that the thermostat is working you have to start with a cold engine, like first thing in the morning. Watch the tempurature gauge, it will climb until the thermostat opens, then the gauge will drop back down some. If the thermostat is stuck open, it will never go back down and the truck will be a cold sob, no heat.

IF you still have no heat, post up.

 

Radiator is FULL. Top line hot, buttom line cooler, Coolant is fine. Theres heat, just not that warm.

 

Take off both lines and back flush the heater core. Stuff your garden hose into (as best you can) the lower hose and turn it on full blast. Let it run for a few minutes. Reconnect to the truck, and top off fluids as needed.

 

Could I just connect it to the heater core instead of running it through all the line? Or may the clog be in the line?

 

Yes, you can just hook it to the heater core. rare for a line to clog up. Hooking it to the heater core would be faster and simpler on the Heeps. Should be pretty accessable. If memory serves me right, on the Heeps,they use clamps at the firewall.