2000 Chevy Malibu Green sludge on oil cap

2000 CHEVROLET MALIBU
86,455 MILES • 6 CYL • FWD • AUTOMATIC
Avatar
JLBURKE
  • MEMBER
  • 1 POST
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.
Feb 21, 2010 at 2:25 PM
Advertisement
Avatar
JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
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
Mar 6, 2010 at 10:30 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.