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

1999 Oldsmobile Aurora

Tiny

1013jess

November, 15, 2011 AT 2:34 PM

Should thermostat be changed if over 5 years old?

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1 Answer

Tiny

rasmataz

November, 15, 2011 AT 2:44 PM

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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