After you have checked what is mentioned above, check all your hoses. A small hole in a hose may not leak coolant but instead suck in air while coolant is circulating. This will cause an air pocket and it will puke coolant out soon after. Its usually a sign of air in the system if the temp goes down when driving and up when stopped. Make sure you have the heater on when filling the system to purge the air out of the heater core.
|