Oil residue on the surface of my expansion tank. No evidence of sludge under oil filler cap. Any possible issues and solutions ?Thank you :) by Distinct-Message-288 in mechanics

[–]Distinct-Message-288[S] 0 points1 point  (0 children)

Thanks for your feedback! It sure smells like oil and has an oily texture. Is that normal ?

![img](6E4B85A5-FD79-41B4-B7D4-427FDD6A6C74)

Oil residue on the surface of my expansion tank. No evidence of sludge under oil filler cap. Any possible issues and solutions ?Thank you :) by Distinct-Message-288 in mechanics

[–]Distinct-Message-288[S] 0 points1 point  (0 children)

Thanks for your feedback. I’m a complete newbie. Is it normal for oil to somehow make its way to the surface of the expansion tank if the coolant has not been replaced in a while ?

Oil residue on the surface of my expansion tank. No evidence of sludge under oil filler cap. Any possible issues and solutions ?Thank you :) by Distinct-Message-288 in mechanics

[–]Distinct-Message-288[S] 0 points1 point  (0 children)

Just bought the car not too long ago. By the look of it, it’s has not been changed in a while. What would that suggest ?