Exhaust Manifold - Standard

EXHAUST MANIFOLD

REMOVAL
1. Disconnect negative cable from battery.
2. Raise vehicle on hoist.





3. Remove bolt attaching the wire harness heat shield to the exhaust manifold support bracket (Fig. 142).





4. Remove exhaust manifold support bracket (Fig. 143).
5. Remove fasteners attaching exhaust system flex joint to exhaust manifold flange. Move exhaust system rearward to clear flange studs.
6. Lower vehicle.
7. Disconnect make-up air hose from rear of cylinder head cover.
8. Disconnect oxygen sensor connector and harness clip.





9. Remove heat shield attaching bolts (Fig. 144).
10. Remove upper heat shield for access to manifold bolts.
11. Remove exhaust manifold bolts.
12. Remove exhaust manifold from top of vehicle, between the cylinder head and cowl.

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 inch per foot) of manifold length.
2. Inspect manifolds for cracks or distortion. Replace manifold as necessary.

INSTALLATION
1. Position exhaust manifold and gasket in place.





2. Install exhaust manifold bolts and tighten in sequence shown in (Fig. 145) to 23 Nm (200 inch lbs.).
3. Position lower and upper heat shield on exhaust manifold. Install heat shield bolts and tighten to 11 Nm (95 inch lbs.) (Fig. 144).
4. Connect oxygen sensor electrical connector and harness clip.
5. Connect make-up air hose on cylinder head cover port.
6. Raise vehicle.
7. Install new flex joint to manifold flange gasket.
8. Attach exhaust system to manifold flange and tighten fasteners to 28 Nm (250 inch lbs.).
9. Install exhaust manifold support bracket and tighten fasteners (Fig. 143).
10. Install bolt attaching wire harness heat shield to support bracket (Fig. 142).
11. Lower vehicle.
12. Connect negative cable to battery.