Durango 4WD V8-5.9L VIN Z (1998)
Heat Shield: Description and Operation
Heat shields are needed to protect both the vehicle and the environment from the high temperatures developed by the catalytic converter. The catalytic
converter releases additional heat into the exhaust system. Under severe operating conditions, the temperature increases in the area of the converter. Such
conditions can exist when the engine misfires or otherwise does not operate at peak efficiency.
CAUTION: Avoid application of rust prevention compounds or undercoating materials to exhaust system floor pan heat shields. Light overspray near
the edges is permitted. Application of coating will result in excessive floor pan temperatures and objectionable fumes.
