Operation CHARM: Car repair manuals for everyone.

Cooling System: Description and Operation





Coolant System


Risk of scalding due to hot steam and hot coolant.

The coolant system is under pressure when the engine is warm.

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

Reduce pressure by covering coolant reservoir 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.

Ensure sufficient clearance to all moving or hot components.

When the engine is warm the cooling system is under pressure. If necessary release pressure before commencing repair work.

Secure all hose connections with hose clamps.

Pliers for spring-type clamps are recommended for installing spring clamps.

Always replace gaskets and seals.

Arrows on coolant pipes and coolant hoses must line up across from each other.