Engine runs hot and noisy after replacing water pump, hear sensor and thermostat?

Tiny
CLIFTON STOVALL SR.
  • MEMBER
  • 2004 PONTIAC GRAND PRIX
  • 3.8L
  • V6
  • 2WD
  • AUTOMATIC
  • 220,000 MILES
Installed new water pump, heat sensor and thermostat. Was a lot of rust in radiator. Temperature hand goes above normal but doesn't run hot. Loud noise when I stop at stop sign or when I slow to make a turn but never hear it while driving. Do I need to flush my radiator?
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Wednesday, September 15th, 2021 AT 3:39 PM

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Tiny
ASEMASTER6371
  • EXPERT
Good afternoon,

Yes, you do. You need to get all the rust out of the system as that rust may be clogging the cores in the radiator itself.

https://www.2carpros.com/articles/coolant-flush-and-refill-all-cars

A simple flush may not take care of it. You may need a shop to do an acid flush where they use an acid-based flush and force it through the radiator.

In the worse case, the radiator would have to be replaced to get the circulation back.

https://www.2carpros.com/articles/how-to-replace-a-car-radiator

Let us know if you have any other questions.

Roy
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Wednesday, September 15th, 2021 AT 4:14 PM

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