Removal and Replacement

Exhaust Manifold









Removal

1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Jacking and Lifting Service and Repair.

2. Remove the exhaust flexible pipe. For additional information, refer to Exhaust System Exhaust Flexible Pipe.

3. Disconnect the Heated Oxygen Sensor (HO2S) electrical connector.

4. Remove the 4 exhaust manifold heat shield bolts and the heat shield.

5. If equipped, detach the block heater wire harness retainer from the exhaust manifold stud.

6. Remove and discard the 7 exhaust manifold nuts.

7. Remove the exhaust manifold and discard the exhaust manifold gasket.

8. Remove and discard the 7 cylinder head studs.

9. Clean and inspect the exhaust manifold. For additional information, refer to Engine System - General Information Exhaust Manifold Cleaning and Inspection.

Installation

1. Install the 7 new cylinder head studs.
- Tighten to 17 Nm (150 lb-in).

2. NOTICE: Failure to tighten the catalytic converter nuts to specification before installing the converter bracket bolts will cause the converter to develop an exhaust leak.

NOTICE: Failure to tighten the catalytic converter nuts to specification a second time will cause the converter to develop an exhaust leak.

Install a new exhaust manifold gasket, the exhaust manifold and 7 new nuts in the sequence shown in 2 stages:

- Stage 1: Tighten to 48 Nm (35 lb-ft).

- Stage 2: Tighten to 48 Nm (35 lb-ft).





3. If equipped, attach the block heater wire harness retainer to the exhaust manifold stud.

4. Install the exhaust manifold heat shield and the 4 bolts.
- Tighten to 10 Nm (89 lb-in).

5. Connect the HO2S electrical connector.

6. Install the exhaust flexible pipe. For additional information, refer to Exhaust System Exhaust Flexible Pipe.