Uncommon Cooling System Problems
Problems not requiring disassembly of the cooling system:
| • | Large obstructions that block the radiator or the condenser |
| • | Auxiliary oil coolers-relocate |
| • | Ice, mud, or snow-remove |
| • | Engine oil overfill-check engine oil dipstick |
| • | Incorrect radiator for application-install the correct radiator |
| • | Missing or damaged air baffle or lower air deflector-repair or
replace as necessary |
Problems requiring disassembly of the cooling system:
| • | An incorrect or damaged fan-repair or replace as necessary |
| • | Faulty emission system components (could cause overheating at
idle)-replace the faulty component |
| • | Positive Crankcase Ventilation (PCV) valve |
| • | Thermal Vacuum Valve (TVV) |
| • | Pressure testing the cooling system with the radiator cap installed |
| • | A faulty coolant pump-replace the coolant pump |
| • | The timing chain/belt cover |
| • | The intake manifold gasket |
| • | Plugged coolant passages in the cylinder head(s)-remove the head(s)
and check visually |
