How to flush and fill cooling system on a 1999 olds Aurora 4.0 northstar engine

Tiny
1013JESS
  • MEMBER
  • 1999 OLDSMOBILE AURORA
  • 155,000 MILES
Should thermostat be changed if over 5 years old?
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Tuesday, November 15th, 2011 AT 2:34 PM

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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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