Cooling System: Service Precautions

Cooling System Components


Risk of scalding due to hot steam and hot coolant:

• When the engine is warm the coolant system is under pressure.

• Wear protective goggles and protective clothing to prevent damage to eyes and scalding.

• Reduce pressure by covering the coolant expansion tank cap with a cloth and carefully opening.


When doing any repair work, especially in the engine compartment, pay attention to the following due to clearance issues:

• Route all lines and wires in their original locations.

• For example, for fuel, hydraulic, Evaporative Emission (EVAP), coolant, refrigerant, brake fluid and vacuum lines.

• Ensure sufficient clearance to all moving or hot components.

• Secure all hose connections using hose clamps appropriate for the model type.

• Hoses are secured with spring-type clips. In cases of repair only use spring-type clips.

• Hose clip pliers (VAS 6362) or (VAS 6340) are recommended for installing spring clamps.

• When installing coolant hoses, make sure they are free of stress and do not come into contact with other components (observe the marks on the coolant connections and hoses).

Special tools, testers and auxiliary items required

• Hose Clip Pliers (VAS 6362)