Wrangler 4WD L4-150 2.5L VIN P MFI (1998)
Catalytic Converter: Description and Operation
CAUTION: Avoid application of rust prevention compounds or undercoating materials to exhaust system floor pan exhaust heat shields. Light
over-spray near the edges is permitted. Application of coating will result in excessive floor pan temperatures and objectionable fumes.
CATALYTIC CONVERTER
Fig. 1 Exhaust System
The basic exhaust system consists of an engine exhaust manifold, exhaust pipe with oxygen sensor, catalytic converter with oxygen sensor exhaust
heat shield(s), muffler and exhaust tailpipe (Fig. 1).
The exhaust system uses a single muffler with a catalytic converter consisting of dual ceramic monoliths.
The stainless steel catalytic converter body is designed to last the life of the vehicle. Excessive heat can result in bulging or other distortion, but
excessive heat will not be the fault of the converter. If unburned fuel enters the converter, overheating may occur. If a converter is heat-damaged,
correct the cause of the damage at the same time the converter is replaced. Also, inspect all other components of the exhaust system for heat
damage.
Unleaded gasoline must be used to avoid contaminating the catalyst core.
