Exhaust Manifold Pipe Replacement - Front

FRONT EXHAUST MANIFOLD PIPE

REMOVAL

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.





1. Remove the heated oxygen sensor electrical connector

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

2. Raise vehicle on hoist
3. Remove heated oxygen sensor.





4. Remove exhaust manifold pipe to exhaust manifold nuts.





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

INSTALLATION





1. Position gasket on exhaust manifold pipe.
2. Position front exhaust manifold pipe into vehicle.

NOTICE: Do not tighten fasteners.

3. Install exhaust manifold pipe to exhaust manifold nuts.





4. Position gasket between front and rear exhaust manifold pipes
5. Install front exhaust manifold pipe to rear exhaust manifold pipe bolts and tighten
Torque:
Exhaust Manifold Pipe Bolts: 20 Nm (15 ft. lbs.)
6. Tighten exhaust manifold pipe to exhaust manifold nuts
Torque:
Exhaust Manifold Pipe-to-Exhaust Manifold Nuts: 30 Nm (25 ft. lbs.)





NOTICE: Always use a pickle-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.

7. Install the heated oxygen sensor
Torque:
Oxygen Sensors (Lower Exhaust Pipe): 45 Nm (33 ft. lbs.)
8. Connect heated oxygen sensor harness connector
9. Lower vehicle from hoist
10. Start engine and check for exhaust leaks