2004 Jeep Laredo Overheating

Tiny
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

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 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
Tiny
ABILENEJADE
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  • 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
Tiny
ABILENEJADE
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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
Tiny
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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
Tiny
ABILENEJADE
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Hi Joe!
Thank you again! It needed a new fan! Cooling like a refrigerator now! In 100+ degree weather, it is truly needed and wonderful!
Abilenejade
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Friday, August 8th, 2014 AT 9:18 PM
Tiny
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That's what I thought. Glad you got it fixed. Let me know if you have other questions.

Joe
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Friday, August 8th, 2014 AT 9:27 PM

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