Exhaust Manifold Installation - Left
WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
- Tighten the exhaust manifold bolts as specified in the service procedure. Improperly installed and/or leaking exhaust manifold gaskets may effect 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.
- 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.
- Install the exhaust manifold and NEW exhaust manifold gasket.
- Install the exhaust manifold bolts.
Tighten:
- Tighten the exhaust manifold bolts a first pass to 15 N.m (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.
- Tighten the exhaust manifold bolts a final pass to 25 N.m (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.
- Using a flat punch, bend over the exposed edge of the exhaust manifold gasket at the rear of the left cylinder head.
- Install the exhaust manifold heat shield and bolts, if required.
Tighten: Tighten the heat shield bolts to 9 N.m (80 lb in).
- Install the air injection reaction (AIR) pipe, with check valve, NEW gasket, and bolts.
Tighten: Tighten the AIR pipe to exhaust manifold bolts to 20 N.m (15 lb ft).
- Install the oxygen sensor into the intake manifold.
Tighten: Tighten the oxygen sensor to 42 N.m (30 lb ft).
IMPORTANT:
NOTE:
Refer to Fastener Notice
in Cautions and Notices.