RAM 3500 Truck 4WD V10-8.0L VIN W HDC (1999)
Heat Shield: Description and Operation
Exhaust heat shields are needed to protect both the vehicle and the environment from the high temperatures developed by the catalytic converter. The
combustion reaction facilitated by the catalyst releases additional heat in the exhaust system. Under severe operating conditions, the temperature
increases in the area of the reactor. Such conditions can exist when the engine misfires or otherwise does not operate at peak efficiency. DO NOT
remove spark plug wires from plugs or by any other means short out cylinders. Failure of the catalytic converter can occur due to a temperature
increase caused by unburned fuel passing through the converter.
DO NOT allow the engine to operate at fast idle for extended periods (over 5 minutes). This condition may result in excessive temperatures in the
exhaust system and on the floor pan.
