2007 JK overheats

[chrispeel2001]

I have a 2007 JK wrangler. Its started overheating. I seem to be losing coolant but theres no obvious leak, at least not obvious to me. I have replaced the heater core and flushed the coolant system, including flushing the heater core. I have also replaced the radiator and water pump. Any ideas?

 

[Lance Unibagger]

Howdy, you can pressure test the cooling system, or have it done to identify whether or not the system is 100% sealed. Did you replace the thermostat when you changed out the other components? If not, I would recommend doing that - I always drill a very small hole in the thermostat housing to allow air to easily be bleed from the system.

 

[pc1p]

When you say "overheating", are you actually steaming over or are you just using the gauge?

The temp senders are known to fail at some point in their life. Unless you're steaming over, I would question your gauge accuracy...

 

[Lance Unibagger]

I have a 2007 JK wrangler. Its started overheating. I seem to be losing coolant but theres no obvious leak, at least not obvious to me. I have replaced the heater core and flushed the coolant system, including flushing the heater core. I have also replaced the radiator and water pump. Any ideas?

I forgot to ask if you have used another form of testing the temperature? I use a laser thermometer... Also, and probably a silly question, is the cooling fan switching on?

 

[chrispeel2001]

Think I may have figured out the issue. Looks like possibly a blown head gasket. I was driving and had to pull over, white smoke was billowing from the engine

 

[chrispeel2001]

I forgot to ask if you have used another form of testing the temperature? I use a laser thermometer... Also, and probably a silly question, is the cooling fan switching on?

Yes. The fan is running

 

[Aguëbaná]

I have a 2007 JK wrangler. Its started overheating. I seem to be losing coolant but theres no obvious leak, at least not obvious to me. I have replaced the heater core and flushed the coolant system, including flushing the heater core. I have also replaced the radiator and water pump. Any ideas?

I have a 2017 Jeep Wrangler Sahara JK that was experiencing overheating issues. I replaced the radiator, water pump, and thermostat twice, but the problem persisted. After taking it to the dealership for a diagnostic, I was informed that the thermostat was defective. The first two thermostats I installed were aftermarket parts, which did not allow the engine to cool properly. I then replaced the thermostat with an OEM Mopar part, and since then, the engine temperature has returned to normal.