Engine Cooling System Overheating: Notes

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

• Prolonged idle
• Debris blocking the grill or cooling module
• Slight tail wind at idle
• Slow traffic
• Traffic jams
• High speed
• Trailer towing
• Steep grades
• Any accessory addition that fully or partially blocks the grille opening