Overheating
» Insufficient coolant in system (“Weekly checks”).
» Thermostat faulty.
» Radiator core blocked, or grille restricted.
» Electric cooling fan
or thermostatic switch faulty.
» Pressure cap faulty.
» Ignition timing incorrect,
or ignition system fault.
» Inaccurate temperature gauge sender unit.
» Airlock in cooling system.
Overcooling
» Thermostat faulty.
» Inaccurate temperature gauge sender unit.
External coolant leakage
» Deteriorated or damaged hoses or hose clips.
» Radiator core or heater matrix leaking.
» Pressure cap faulty.
» Water pump internal seal leaking.
» Water pump gasket leaking.
» Boiling due to overheating.
» Core plug leaking. |
Internal coolant leakage
» Leaking cylinder head gasket.
» Cracked cylinder head or cylinder block.
Corrosion
» Infrequent draining and flushing.
» Incorrect coolant mixture
or inappropriate coolant type. |
