88. Exhaust Manifold Installation - Right Side

Exhaust Manifold Installation - Right Side





Caution: Refer to Fastener Caution (Fastener Caution).

Note:
* 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 diagnostic (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 3 threads of the bolt.

1. Install the heat shield (603) and bolts (604) and tighten to 9 Nm (80 lb in).
2. Install the exhaust pipe studs (605) and tighten to 20 Nm (15 lb ft).




3. Apply a 5 mm (0.2 in) wide band of threadlock GM P/N 12345493 (Canadian P/N 10953488), or equivalent, to the threads of the exhaust manifold bolts. Refer to Adhesives, Fluids, Lubricants, and Sealers (Specifications).
4. Install the exhaust manifold, NEW gasket, and bolts.

1. Tighten the exhaust manifold bolts a first pass to 15 Nm (11 lb ft). Tighten the exhaust manifold bolts beginning with the center 2 bolts. Alternate from side-to-side, and work toward the outside bolts.
2. Tighten the exhaust manifold bolts a final pass to 25 Nm (18 lb ft). Tighten the exhaust manifold bolts beginning with the center 2 bolts. Alternate from side-to-side, and work toward the outside bolts.

5. Using a flat punch, bend over the exposed edge of the exhaust manifold gasket at the rear of the left cylinder head.