I think I may have a cooling problem. After a long drive I notice my reservoir tank is full (it's normal for the level to increase with temperature I think) but it never goes back down. It stays full even after the engine has cooled (even after multiple days of not driving). This leaves my radiator empty when I check it. When I empty the reservoir back into the radiator until it is full, the reservoir is back to the low mark, so this shows me I'm not loosing any coolant as I don't need to add more. It's just that the coolant eventually migrates to a new location and gets stuck there. The temp gauge has never showed overheating. The heater still blows hot. Any suggestions?
Sounds like an air lock. Did you burp the radiator after changing the coolant recently ? It just involved running the engine from cold with the main radiator cap off to allow air to escape. Don’t run the engine and then remove the cap or you’ll hurt yourself quite badly.
