Exhaust Manifold: Service and Repair
EXHAUST MANIFOLDREMOVAL
1. Raise vehicle and disconnect exhaust pipe from the exhaust manifold.
2. Lower the vehicle.
3. Disconnect upstream oxygen sensor connector at the rear of exhaust manifold.
4. Remove the air cleaner bracket (Fig. 93).
5. Remove the heat shield.
6. Remove the bolts attaching the manifold to the cylinder head.
7. Remove exhaust manifold.
8. Inspect the manifold.
CLEANING
1. Discard gasket (if equipped) and clean all surfaces of manifold and cylinder head.
INSPECTION
1. Inspect manifold gasket surfaces for flatness with straight edge. Surface must be flat within 0.15 mm per 300 mm (0.006 in. per foot) of manifold length.
2. Inspect manifolds for cracks or distortion. Replace manifold as necessary.
INSTALLATION
1. Clean the manifold mating surfaces.
2. Install exhaust manifold with a new gasket. Tighten attaching nuts to 20 Nm (175 inch lbs.).
3. Attach exhaust pipe to exhaust manifold and tighten fasteners to 37 Nm (27 ft. lbs.).
4. Install and connect the oxygen sensor.
5. Install the heat shield.
6. Install the air cleaner bracket.