OIL IN COOLANT RESERVOIR?

CRY4HELP0069

MEMBER
2009 CHEVROLET AVEO
1.6L
4 CYL
AUTOMATIC
144,000 MILES

Hose busted on radiator. Now car has milky substances in the water reservoir and radiator. The car still starts and drives. Have taken it apart no sign of water in the oil pan, under oil cover, transmission fluid level is still normal and oil level is still normal. SO puzzled big time as to where this color is coming from. When car is sitting idle the temperature gauge rises pass normal and once you turn on the air conditioner it keep it at bay but it still fluctuates but does not go up very high but once u turn air conditioner off it rises again. ANY help on this matter will be greatly appreciated. Only mode of transportation and this is very nerve wracking no one has ever heard or came across this issue before.

1 Reply

HMAC300

MECHANIC
48,601 POSTS

Hello,

It sounds like the transmission cooler inside the radiator has let go I would stop driving it and change the radiator out here is a guide to help you with the the steps below to show you how on your car.

https://www.2carpros.com/articles/how-to-replace-a-car-radiator

I would then service the transmission here is a guide, because when the engine is shut off coolant can go inside the transmission which is not good.

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

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