I have a 2010 Chevy Aveo and 3 months after I bought it, I took it in for a tune up and they said I had oil in the water, but not to worry about it. Several months later I took it on a trip and it overheated. I took it to a shop where they flushed the radiator, new thermostat and sent me on my way. Now, several months later, I had to have it flushed because of MORE oil in the water and it gooped up the thermostat. At that time, they thought it was wrong antifreeze type. Got it working again but the shop can find no cause for oil in the water. It runs like a champ, the temperature gauge never shows that it is overheated, but even before the motor heats up, it steams and stinks. I can't even drive it a few miles without it steaming and stinking. Also, when I turn the heater on, it pulls the steam and stink into the cab if that tells you anything. Please Help!

 

Probably intake manifold gasket

 

oh boy! That doesn't sound good at all. Thank you for your response.

 

I think our 2015 Sonic 1.8i automatic has a cooler that transfers heat from the oil to the coolant . If so , there may be a leak there , between those 2 systems .

Rockauto.com seems to show 2 different styles ?

Wyr
God bless

 

ok thanks!

 

:-)

Wyr
God bless

 

I took it to the local college and they took a look at it. Turns out it is a leaky oil cooler that is located behind the engine and under the exhaust. Chevy put it so close to the heat that it baked the rings and gaskets inside. It then leaks into the water and gives it the repeated oily film in the radiator that gunks up the thermostat. So that is the problem with it. Mystery solved.

 

Is it this ;

https://www.rockauto.com/en/catalog/...il+cooler,2084

Wyr
God bless

 

Yes! You were right and that is what the part looks like that they showed me. Thank you!

 

I have heard even a blind hog finds an acorn evey once in a while . I guess I found an acorn ? :-)

You are welcome . Glad to asst .

Wyr
God bless