1997 Pontiac Grand Prix Coolant has milky goo around rad ca

Tiny
3DSPYDER
  • MEMBER
  • 1997 PONTIAC GRAND PRIX
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
Just had the oil changed and the mechanic noticed that there was a white chunky substance around the rad cap and said that it was oil in the coolant. They checked the oil that was changed out and found no trace of coolant in the oil. Engine runs fine and does not overheat but it does heat up slightly at idle for 5 minutes or more but fan kicks in and it cools down. I have a 180* T-Stat. Mechanic also stated that the hoses where soft and should be replaced along with a coolant flush. Could it be a blown head gasket or lower intake manifold gasket? And should I change the DEX-cool coolant for the green stuff?
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Friday, April 24th, 2009 AT 12:12 AM

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Tiny
MMPRINCE4000
  • EXPERT
Drain and flush the cooling system and get rid of Dex Cool. Use any of the newer coolants which mix with all colors.

Drain block also. If intake gasket goes, you will get white smoke out of exhaust.
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Sunday, April 26th, 2009 AT 6:23 AM

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