Exhaust Manifold Pipe Replacement - Rear

1. Remove exhaust manifold pipe heat shield.

NOTICE: Do not apply grease or silicon products to the heated oxygen sensor. Do not alter the wiring in any way. The wires carry air reference to the sensor.





2. Remove heated oxygen sensor electrical connector.
3. Remove heated oxygen sensor.

CAUTION: MAKE SURE VEHICLE IS PROPERLY SUPPORTED AND SQUARELY POSITIONED ON HOIST.

4. Raise vehicle on hoist.





5. Remove rear exhaust manifold pipe to exhaust manifold nuts





6. Remove rear exhaust manifold pipe to front exhaust manifold pipe attachment bolts.





7. Remove rear exhaust manifold pipe to resonator bolts.
8. Remove rear exhaust manifold pipe from vehicle.

INSTALLATION

NOTICE: Do not tighten fasteners at this time.





1. Install exhaust manifold pipe to exhaust manifold gasket, position pipe into vehicle.
2. Install rear exhaust manifold pipe to exhaust manifold nuts.





3. Position gasket and install front exhaust manifold pipe to rear exhaust manifold pipe bolts.





4. Position gasket and install exhaust manifold pipe to resonator bolts and tighten.
^ Torque: 20 Nm (15 ft. lbs.)
5. Tighten exhaust manifold pipe to exhaust manifold nuts.
^ Torque: 30 Nm (25 ft. lbs.)
6. Tighten rear exhaust manifold pipe to front exhaust manifold pipe bolts.
^ Torque: 20 Nm (15 ft. lbs.)





7. Lower vehicle from hoist.

NOTICE: Always use a nickel-based anti-seized compound (Saturn P/N 21485279 or equivalent) on the threads of the oxygen sensor. If the oxygen sensor is replaced, do not apply anti-seize to the new sensor. New sensors have anti-seize pre-applied. Never use silicon product; silicon products will cause damage to oxygen sensor.

8. Install oxygen sensor.
^ Torque: 45 Nm (33 ft. lbs.)
9. Connect oxygen sensor harness connector.





10. Install exhaust manifold pipe heat shield.
^ Torque: 8 Nm (71 inch lbs.)
11. Start engine and check for exhaust leaks.