Catalytic Converter: Service and Repair

REMOVAL
^ Raise vehicle.
^ Remove the retaining bolts at each three-way catalytic converter flange.
^ Remove the three-way catalytic converter to exhaust manifold retaining nuts.
^ Slide the exhaust inlet pipe rearward until the three-way catalytic converters can be removed. It may be necessary to obtain sufficient clearance to separate the three-way catalytic converter at exhaust manifold connection(s).
^ Discard exhaust converter outlet gaskets and any damaged parts.

INSTALLATION
^ Remove exhaust converter outlet gasket material from exhaust inlet pipe and the three-way catalytic converters.
^ Position the three-way catalytic converters to the exhaust manifolds. Loosely install retaining nuts.
^ Install new exhaust converter outlet gaskets between the three-way catalytic converters and exhaust inlet pipe flanges.
^ Position the exhaust inlet pipe flange to the three-way catalytic converter outlet flange and insert new retaining bolts.

NOTE: Alternate tightening of the joint fastener is required to provide uniform clamping. This will prevent joint distortion, a major cause of system leaks and misadjustment.

^ Alternately tighten the three-way catalytic converter to the exhaust inlet pipe flange retaining bolts to 34-46 Nm (26-33 ft lb).
^ Align the system to proper clearance.
^ Alternately tighten the exhaust manifold nuts to 34-46 Nm (26-33 ft lb).
^ Check the system for leaks. Lower vehicle.