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Temperature rise in traffic (only)

Tiny
SPARKY8237
  • MEMBER
  • 1999 JEEP GRAND CHEROKEE
  • 4.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 203,000 MILES
I have replaced all coolant parts. The truck runs fine at 210 until I get into traffic four to thirty plus minutes (ninety nine degree heat Houston Texas) then it starts to increase on temperature never let it go over 220. Park so I do not leak or warp aluminum heads. Help! I have replaced almost everything in the ten years I have owned cannot afford to buy new at this time. Any answer please? Thank you, Julie
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Saturday, June 24th, 2017 AT 12:56 PM

1 Reply

Tiny
HARRY P
  • MECHANIC
  • 2,293 POSTS
If you can get a look at the front of the radiator, I would start there. If it has mud/crud caked on it, then it is not able to pull enough air through the radiator to cool the coolant. Spray it off with the water hose.

If that does not help, then it may be time to flush your cooling system. The cooling system (especially the radiator) has some really tiny holes and valleys in it. Just like the front of the radiator, they can get clogged up. Flushing it out can help with this. Check out this guide: https://www.2carpros.com/articles/coolant-flush-and-refill-all-cars.

Try these things and let us know how it goes for you.
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Saturday, June 24th, 2017 AT 7:21 PM

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