No heat

[Medic520]

Getting No heat in 03 liberty. Top radiator hose is hot, bottom is cold. Is this Normal?

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[Rsb563]

My first guess would be a blown thermostat. If I remember correctly, it's on the bottom hose at the engine.

 

[jharrisliberty]

Yes the thermostat housing is right at the bottom hose on the engine. That is most likely the problem you are having. Just make sure to put HOAT coolant back in when you put in a new thermostat.

 

[Medic520]

Thanks

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[Medic520]

Ok guys, I changed thermostat, lower hose stayed cold until a cut wire to fan. After a short time I had great great lower hose was hot. Then once I started driving it it cooled down again. I hooked fan to switch even with it off and cardboard in front of radiator it takes forever sitting still to heat up, once I start moving no heat again. I need help please.

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[uss2defiant]

1. was t-stat installed properly?
2. was it a mopar t-stat?
3. did you bleed air out of your system?

 

[Medic520]

It was a stat thermostat, it's in the right way not sure about the valve on it being pointed up. Did bleed system.

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[ltd02]

Provided the system is bled properly and the new tstat is working then I'd be wondering if the water pump is pumping or you've got a big blockage in there. How about the coolant? Did you use HOAT?

 

[Medic520]

I used dexcool anti freeze. Thermostat only opens once the needle is way past normal on gauge, Like 3/4. Even with fan off only . It'll blow great heat only for short time then bottom hose cools down again.

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[renegade 04]

Sounds like you need to swap out the thermostat for a mopar thermostat.

 

[ltd02]

I used dexcool anti freeze. Thermostat only opens once the needle is way past normal on gauge, Like 3/4. Even with fan off only . It'll blow great heat only for short time then bottom hose cools down again.

Dexcool is a no-no. If you didn't completely flush the system before adding it and mix that stuff with the factory HOAT you'll get a reaction that can produce a gel like sludge and gum up all sorts of things. I've heard it'll mess up the impeller on the water pump. :Insane:

 

[Medic520]

It was drained out pretty fast.

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