2004 Jeep Laredo Overheating

ABILENEJADE

MEMBER
2004 JEEP GRAND CHEROKEE LAREDO
6 CYL
4WD
AUTOMATIC
165,000 MILES

My Jeep is running hot when I use the air-conditioner. It may run a little hot when I do not, but much worse with. I would appreciate any information you might have!

Thursday, August 7th, 2014 AT 2:12 PM

6 Replies

JACOBANDNICKOLAS

MECHANIC
109,700 POSTS

Does this happen if you are at highway speeds? Have you checked to make sure the thermostat is working? Are the cooling fans running? Is the coolant clean and full? Has the radiator ever been flushed to clean it?

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Thursday, August 7th, 2014 AT 8:42 PM

ABILENEJADE

MEMBER
4 POSTS

It does it in-town, the temp goes down with highway speeds. I have not yet had the fans checked. I had heard that with a vehicle this old (2004) that if the radiator had not been flushed previously that a flush at this point could damage it. I still need to check the fans and the themostat, but coolant is fine.

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Thursday, August 7th, 2014 AT 11:26 PM

ABILENEJADE

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4 POSTS

I would like to apologize.I forgot to thank you for your response! I greatly appreciate it!

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Friday, August 8th, 2014 AT 9:50 AM

JACOBANDNICKOLAS

MECHANIC
109,700 POSTS

You are very welcome.

Okay, since the problem happens when you are driving slowly and in stop and go traffic, that tells me the cooling fan isn't doing its job. Yes, the radiator could be an issue, but since it doesn't do it at highway speed, I am confident it is a cooling fan issue.

When you are driving fast (highway speed) the air flows through the radiator much faster, keeping it cool. In town, the air flow isn't there. As a result, the cooling fan must take over and draw outside air through the radiator. If it doesn't work, the engine will heat up.

Let me know if you have other questions.

Joe

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Friday, August 8th, 2014 AT 8:56 PM

ABILENEJADE