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Home >> Chevrolet >> 2006 >> Optra LS, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 53 (Engine Cooling) >> Diagnostic Information and Procedures >> Engine Overheating

Engine Overheating

WARNING: This page is about a different car, the 2005 Chevrolet Optra5 and 2005 Chevrolet Optra. However, it is still accessible from the selected car via links, so may be relevant.
Checks Actions
A loss of coolant Add coolant.
A weak coolant solution Confirm that the coolant solution is a 50/50 mixture of ethylene glycol and water.
Any dirt, any leaves, or any insects in front of the radiator Clean the front of the radiator.
Leakage from the following components:
  • The hoses
  • The coolant pump
  • The heater
  • The thermostat housing
  • The radiator
  • The core plugs
  • The head gasket
 Replace any damaged components.
A faulty thermostat Replace a damaged thermostat.
Retarded ignition timing Perform an ECM code diagnosis. Confirm the integrity of the timing belt.
An improperly operating electric cooling fan Replace the electric cooling fan.
Plugged or rotted radiator hoses Replace any damaged radiator hoses.
A faulty water pump Replace a faulty water pump.
A faulty surge tank cap Replace a faulty surge tank cap.
A cracked or plugged cylinder head or engine block Repair the damaged cylinder head or the damaged engine block.
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