Flushing

RADIATOR RESTRICTIONS
A dirty, obstructed, or leaking radiator core causes overheating. Scale deposits result from using hard (high-mineral) water in the cooling system. Heating these minerals causes the formation of a hard coating on the surfaces within the radiator. Scaling reduces the transfer of heat. Some hard water produces a silt-like deposit that restricts the flow of water. A radiator that is partially restricted should be removed and cleaned by a radiator repair specialist. Replace a radiator core that is plugged or has a heavy scale.

FLUSHING PROCEDURE
There are different methods to flush the cooling system. Back flushing is recommended. Special equipment is available. Follow the equipment manufacturer's instructions for use.

IMPORTANT:
- Remove the coolant thermostat before flushing the cooling system. Refer to Thermostat Replacement.
- Dispose of the used engine coolant properly.
- Store the used engine coolant in a used coolant holding tank, while awaiting approved disposal methods.
- Never pour used engine coolant down the drain.
- Ethylene-glycol based antifreeze is a toxic chemical.
- Disposal into a sewer system or contaminating the ground water is both environmentally irresponsible and illegal.