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No heat blows cold air and losing coolant but no leaks found in buick century 2002?
Wiki User
∙ 15y ago
If you are losing coolant, there MUST be a leak ... somewhere. Coolant doesn't just "vanish" into thin air - it has to go somewhere. Chances are that there is a pinhole leak that only lets coolant out under pressure, like when traveling down the road at 50 mph or more ... rather hard to check for leaks while going down the road. As the engine case warms up, the pinhole enlarges and lets the liquid out .. when the engine cools, the metal retracts thus closing the pinhole. The only way to find the leak is to have the car stationary while simulating traveling down the road, as on a dynamometer (sp?). Not enough information to give an acurate answer. More information is needed. 1. Is the vehicle running normally? 2. Is the vehicle overheating? 3. Can you smell antifreeze in the tailpipe? 4. Have you run vehicle at full temperature without moving it? You may find a leak that way. Assuming you are indeed losing coolant and do not see any on the ground below your car, you would most likely have a blown headgasket. The gasket seals the water ports and isolates them from the cylinders. The coolant could only escape through the exhaust as steam. Eventually the gasket would open to the extent that one of the cylinders will fill with water and the car will either not start, or will have an abrupt seizing or stoppage. Check for milky oil as well. Water may be going into the lubrication system.
Wiki User
∙ 15y ago
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