For 1990-2009 cars only
- Clean the exhaust manifold (600) and heat shield (603) in solvent.
- Dry the exhaust manifold with compressed air.
- Inspect the exhaust manifold for the following conditions:
- Use a straight edge and a feeler gage to measure the exhaust manifold cylinder head deck for warpage.
Caution: Refer to Safety Glasses Caution in the Preface section.
| • | Exhaust manifold-to-cylinder head gasket surface for excessive scratches or gouging. |
| • | Exhaust pipe studs for damaged threads |
| • | Loose or damaged heat shield (603) or missing bolts (604) |
An exhaust manifold deck with warpage in excess of 0.25 mm (0.010 in), may cause an exhaust leak and may effect OBD II system performance.
Exhaust manifolds not within specifications must be replaced.
