So my sisters 02 liberty limited is overheating when driving. I turn the heat on and its gets really hot. The shop it was at put a new thermostat and water pump and new hoses along with a flush. They did a pressure check and said the head gaskets are cracked. There is no oil in coolant or coolant in oil. They said the crack is letting air into the system. Not leaking a drop of anything. So I flushed the system out and I flushed the radiator. While flushing the radiator the water coming out was about 1/4 of the amount of water going in. Flow restriction? Could the head gasket crack make it over heat while on the road? The fan turns on when it starts to get hot. Also when I take the radiator cap of the overflow, it sounds like a toilet flushing and ***** the coolant from the resvoir into the engine. Please help!
need help on cooling system.
- Thread starter Josh9096
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ltd02
Comfortably numb
A cracked head or failed gasket could definitely cause it to overheat but if it were "letting air" into the coolant that would be exhaust gasses and the coolant would "boil over" if you pulled the cap when running. Which is not a good idea.
Edit: was it overheating before the shop had it? I'm hoping all these coolant changes involved HOAT. If you mix the green stuff in there all kinds of issues can result. They don't like each other. Maybe they never got all the air out and used the wrong coolant.
Not sure I understand the description that you are putting water in and only 1/4 is coming out yet there are no leaks. It has to be going somewhere like cylinders or oil. Does it even run now and if so is there a steam cloud from the exhaust?
Also the removal of the cap and it sucking in coolant means it has to be going somewhere. I'd take it and have someone test the coolant for exhaust gasses and make sure the oil level isn't rising as the coolant mixes in.
When my HGs failed I has a milkshake in the crankcase and the level rose rapidly.
Guess I'm not much help but maybe this will bump it up and someone else will have more insight. :shrug:
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ltd02
Comfortably numb
You'd really have to measure the input and output volumes. It's possible if the factory HOAT wasn't completely flushed it reacted and coagulated with the green stuff and partially blocked the radiator or the heater core or something else. The wrong coolant in these things will also degrade certain components like the water pump impeller and cause other issues. The components that make up the KJ cooling system are designed to work best and last longest by using a coolant with the chemical makeup of HOAT. Using anything else is a crapshoot.
Definitely could still be the HGs but I wonder if you aren't getting the air completely bled, but regardless the system should eventually not keep sucking in coolant. I guess I'd keep dumping coolant in (or water at least) until it stopped taking more or started pouring out of some orifice.
TwoBobsKJ
Full Access Member
The "green stuff" is not compatible with the Jeep's engine - no matter what the label or an uninformed mechanic might say. The only coolant that should be in these engines is HOAT which is found in brands like Zerex G05. Pick it up at O'Reilly's and some NAPA stores.
I agree with Idt2 - if there's no coolant in the oil and it's not being blown out the exhaust it has to be going somewhere or your cooling system isn't full.
Bob
I agree with Idt2 - if there's no coolant in the oil and it's not being blown out the exhaust it has to be going somewhere or your cooling system isn't full.
Bob
CactusJacked
Full Access Member
With the lower radiator hose off, water should be flowing out the bottom as fast as the hose is feeding it into the top. If water is more of a dribble coming out, then the radiator is clogged.
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