2000 Chevy Malibu Green sludge on oil cap

Tiny
JLBURKE
  • MEMBER
  • 2000 CHEVROLET MALIBU
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 86,455 MILES
I just purchased a used car and found that the oil was too full, but there was green sludge/or gell on the oil cap. Is this antifreeze in the oil? The oil looks nmormal clolor.
Sunday, February 21st, 2010 AT 2:25 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,071 POSTS
Usually when there is coolant getting into the oil, you will get a creamy white / light brown build up and you can see it on the dip stick.

Since you only have it on the oil cap, chech to make sure the PCV valve is good and not sticking shut. That can cause condensation in the engine. Also, I have to be honest; I never saw a green build up. Keep an eye on the coolant to see if you are using it. Also, if the car has dexcool coolant (pinkish color) and that is what is still in the vehicle, don't mix any other brand with it.

Let me know what you find.

Joe
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Saturday, March 6th, 2010 AT 10:30 PM

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