2000 Pontiac Grand Prix oil in coolant

2000 PONTIAC GRAND PRIX
145,000 MILES • 6 CYL • 2WD • AUTOMATIC
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BLUE44332
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  • 1 POST
What causes oil in radiator?
Oct 7, 2009 at 10:58 PM
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MMPRINCE4000
  • ✓ASE Certified Mechanic
  • 8,548 POSTS
  • ASE Certified Mechanic
If motor oil, a head gasket could be leaking oil into coolant.

If it is just in the radiator and is red, it is from transmission oil cooler in radiator, it has ruptured and the radiator would need to be replaced.

If coolant is in crankcase, STOP driving. Coolant will wash the oil film off main and cam bearings and cause MAJOR engine damage.
Oct 8, 2009 at 9:25 AM
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