Coolant in oil

1998 BUICK CENTURY
130,000 MILES • 6 CYL • 2WD • AUTOMATIC
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JERRY HOLLOWAY
  • MEMBER
  • 1 POST
Car started overheating So I checked coolant and hoses and radiator. Was no leaks anywhere but was dangerously low on coolant. I added more coolant and then checked the oil. It was milky on the oil stick.
Oct 30, 2017 at 5:25 PM
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STEVE W.
  • ✓ASE Certified Mechanic
  • 15,200 POSTS
  • ASE Certified Mechanic
Not a good sign. There are two possible areas that can cause this. One is the head gaskets the other are the intake manifold gaskets.
Step one would be to change the oil and filter. Now run a combustion gas test and see if it is a head gasket issue.
https://www.2carpros.com/articles/head-gasket-blown-test

If the tests show good compression and no gasses in the coolant it is likely to be just the intake gaskets. Those are not that bad to change.
Oct 30, 2017 at 5:38 PM
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