Overheating within three or four blocks of driving?

Tiny
SLICK163B
  • MEMBER
  • 2002 CHRYSLER 300
  • 132,000 MILES
My car is running hot within 3 or 4 blocks of driving. I have changed the thermostat, replaced hoses, and it already have a new radiator installed a few month ago.
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Friday, March 22nd, 2013 AT 8:00 PM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

If the radiator cooling fans are not operating the engine will overheat.
Check to see if the fans are coming on when the engine is at operating temperature.
The radiator fan can be inoperative due to bad relay or wiring, it can also be faulty coolant temperature sensor. The Sensor can send incorrect data to the control module and the fan will not come on.

https://www.2carpros.com/articles/how-an-electric-cooling-fan-works
https://www.2carpros.com/articles/replace-electric-fan-motor

First check the fan relay. The relay is located under the hood in the fuse box (see diagram).
Check for any corrosion or bunt pin(s). This vehicle has 2 relays for the radiator fans.
You can also test the relay as well.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

If the relays are good then check to see if you are getting power to the fan at the connectors. If you have power there then it is likely bad fan motor.

I have attached diagrams for your reference.

Please let me know of any questions.
Thank you.
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Thursday, September 9th, 2021 AT 11:54 AM

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