Exhaust Manifold Replacement - Right

EXHAUST MANIFOLD REPLACEMENT - RIGHT




1. Remove the ignition coils.
2. Remove the spark plugs.
3. Raise and suitably support the vehicle. Refer to Vehicle Lifting.
4. Remove the exhaust manifold pipe nuts.
5. Lower the vehicle.




6. Remove the exhaust manifold bolts, engine oil dipstick tube, manifold, and manifold gasket.
7. Discard the gasket.




8. Remove the heat shield bolts (1), and shield (2) from the exhaust manifold (1).
9. Clean and inspect the exhaust manifold.

INSTALLATION PROCEDURE

NOTE: Refer to Fastener Notice in Service Precautions.




1. Install the heat shield (2), and bolts (1) to the exhaust manifold (1), it necessary.

Tighten
Tighten the bolts to 9 N.m (80 lb in).

IMPORTANT:
- Tighten the exhaust manifold bolts as specified in the service procedure. Improperly installed and/or leaking exhaust manifold gaskets may affect vehicle emissions and/or On-Board Diagnostics (OBD) II system performance.
- The cylinder head exhaust manifold bolt hole threads must be clean and free of debris or threadlocking material.
- Do not apply sealant to the first three threads of the bolt.




2. Apply a 5 mm (0.2 in) wide band of threadlike GM P/N 12345493 (Canadian P/N 10953488) or equivalent to the threads of the exhaust manifold bolts.
3. Install the NEW manifold gasket, exhaust manifold, engine oil dipstick tube, and bolts.

Tighten
3.1. Tighten the exhaust manifold bolts a first pass to 15 N.m (11 lb ft). Tighten the exhaust manifold bolts beginning with the center two bolts. Alternate from side-to-side, and work toward the outside bolts.
3.2. Tighten the exhaust manifold bolts a final pass to 25 N.m (18 lb ft). Tighten the exhaust manifold bolts beginning with the center two bolts. Alternate from side-to-side, and work toward the outside bolts.

4. Using a flat punch, bend over the exposed edge of the exhaust manifold gasket at the front of the right cylinder head.
5. Install the spark plugs.
6. Install the ignition coils.
7. Raise the vehicle.




8. Install the exhaust manifold pipe nuts.

Tighten
Tighten the nuts to 50 N.m (37 lb ft).

9. Lower the vehicle.