Cooling System: Testing and Inspection

UNCOMMON COOLING SYSTEM PROBLEMS

Problems Not Requiring Disassembly Of The Cooling System
1. Remove large obstructions blocking the radiator or condenser.
^ Ice, mud or snow obstructing the grille.
2. Engine oil is overfilled.
3. Incorrect radiator for the vehicle.
^ Check the part number.
4. Loose, damaged or missing air seals.
5. Missing or damaged lower air baffle.
6. Incorrect ignition timing.

Problems Requiring Disassembly Of The Cooling System
1. Incorrect or damaged fan.
2. Worn or damaged emission system components.
^ Could cause overheating at idle.
^ Damaged Positive Crankcase Ventilation valve.
3. Pressure check the cooling system with the pressure cap installed.
^ Shows if the pressure cap leaks because of radiator filler neck damage.
4. Worn or damaged water pump.
^ Impeller vanes eroded or broken.
^ Worn or damaged bearing and/or seal-check for shaft or bearing play.
5. Plugged radiator tubes.
^ Perform a flow check.
6. Internal system leaks.
^ Head gasket.
^ Cracked block.
^ Timing chain cover.
^ Intake manifold gasket.
7. Plugged Engine Coolant passages in the cylinder heads.
^ Visual check