Cooling System Overheating

Cooling System Overheating

Establish what driving conditions caused the complaint. Abnormal loads on the cooling system such as the following may be the cause:

• Prolonged idle.

• Very high ambient temperature.

• Slight tail wind at idle.

• Slow traffic.

• Traffic jams.

• High speed or steep grades.

Driving techniques that avoid overheating are:

• Idle with A/C off when temperature gauge is at end of normal range.

Recent Service Or Accident Repair:

• Engine adjustments (incorrect timing).

• Slipping accessory drive belt.

• Brakes (possibly dragging).

• Changed parts (incorrect water pump).

• Reconditioned radiator or cooling system refilling (possibly under filled or air trapped in system).

• If investigation reveals none of the previous items as a cause for an engine overheating complaint, refer to following Cooling System Diagnosis charts.

Trailer Towing:

Consult Trailer Towing section of owners manual. Do not exceed limits.

These charts are to be used as a quick-reference only.