87. Exhaust Manifold Installation - Right

Exhaust Manifold Installation - Right





1. Notice: Refer to Fastener Notice in Service Precautions.

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 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 three threads of the bolt.

Install the heat shield (603) and bolts (604).
Tighten the bolts to 9 Nm (80 inch lbs.).
2. Install the exhaust pipe studs.
Tighten the studs to 20 Nm (15 ft. lbs.).





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.
4. Install the exhaust manifold, NEW gasket, and bolts.
1. Tighten the exhaust manifold bolts a first pass to 15 Nm (11 ft. lbs.). Tighten the exhaust manifold bolts beginning with the center two bolts. Alternate from side-to-side, and work toward the outside bolts.
2. Tighten the exhaust manifold bolts a final pass to 20 Nm (15 ft. lbs.). Tighten the exhaust manifold bolts beginning with the center two 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.