HOW TO FLUSH AND FILL COOLING SYSTEM ON A 1999 OLDS AURORA 4.0 NORTHSTAR ENGINE

  • Tiny
  • 1013jess
  • 1999 Oldsmobile Aurora
  • 155,000 miles

Should thermostat be changed if over 5 years old?

Tuesday, November 15th, 2011 AT 2:34 PM

1 Answer

  • Tiny
  • rasmataz
  • Member

You should replace it-Open the drain plug and keep flushing it till it clears up then put fresh coolant in keep filling it till it wont take it-make sure heater is on high-

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Tuesday, November 15th, 2011 AT 2:44 PM

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