Exhaust System: Service and Repair

REMOVAL

WARNING: Always wear protective goggles and gloves when removing exhaust parts as falling rust and sharp edges from worn exhaust components could result in serious personal injury.

^ When removing exhaust components, an accumulation of dirt and corrosion can make the work difficult. Using a penetrating oil on the threads of U-bolts can assist in the removal of these components.

INSTALLATION

When installing a new exhaust pipe or muffler and tailpipe on any model, check for proper alignment. Rattles and noise vibrations in the exhaust system are usually caused by misaligned parts. When aligning the system, leave all bolts or nuts loose until all parts are properly aligned and then tighten, working from the front to the rear. Damaged exhaust system hangers, hanger brackets and clamps must be replaced to maintain exhaust system alignment.

CAUTION: When jacking or lifting the vehicle from the frame side rails, make sure the lift pads do not contact the catalytic converter as damage to the catalytic converter will result.

NOTE:
^ When servicing of the exhaust system requires removing and replacing the oxygen sensors.
^ Sealer GM P/N 9985020 or equivalent is to be applied to all slip joint connections.
^ When replacing a muffler, the tailpipe should also be replaced.
^ When installing the exhaust pipe to the exhaust manifold, always use new nuts. Clean the exhaust manifold stud threads with a wire brush before installing the new nuts.