Jeep Wrangler: Cooling System Tips — Automatic Transmission / Do Not Operate The Engine With Failed Parts

All engine failures give some warning before the parts fail. Be on the alert for changes in performance, sounds, and visual evidence that the engine requires service. Some important clues are:

• Engine misfiring or vibrating severely
• Sudden loss of power
• Unusual engine noises
• Fuel, oil or coolant leaks
• Sudden change, outside the normal operating range, in the engine operating temperature
• Excessive smoke
• Oil pressure drop