WATCH A HEAD GASKET REPAIR BY A CERTIFIED THERMALWELD TECHNICIAN 1:54
COOLANT SYSTEM TIPS: COOLING FANS
Every component in a vehicles coolant system must work together. If only one of the components fails, overheating will occur. When an engine overheats the need for a head gasket repair is probable. Over time the cooling fans wear out. As a vehicle is driven down the road, air is being forced into the front of the radiator. The fan helps draw air through the back of the radiator. The fan is especially important if the vehicle is stopped in traffic. No air is being forced into the front of the radiator when a vehicle is stopped. If the fan is not functioning properly overheating will occur. There are two different types of cooling fans. Direct drive and electric. The direct drive fan is powered by the engine with pullys and belts. A question that is asked often: If the engine is running and the fan is turning, how can the fan be defective? Most direct drive fans have an internal centrifugal clutch that wears out over time. An experienced Thermalweld technician from Ideal Head Gasket Repair can perform a simple test to determine if the fan is operating properly. If the fan is not turning properly. Not enough air is being pulled through the radiator to cool the coolant before it goes back into the engine. The same is true for an electric fans. An electric fan plays an important role in cooling an engine, same as a direct drive fan. Often when an electric fan gets old, the temperature sensor or the relay quit working properly. If the temperature sensor is malfunctioning the fan will not come on at the proper time. Sometimes the relay switch gets a signal from the sensor but the switch has corrosion and can not make a good contact to activate the fan. It is common to bypass the sensor/relay components and direct wire the fan. When a fan is direct wired, the fan comes on as soon as the engine is started. There are kits at the local auto parts stores to bypass the fan system.