For 1990-2009 cars only
- Clean the exhaust manifold (1) and heat shield (2) in solvent.
- Dry the exhaust manifold with compressed air.
- Inspect the exhaust manifold for the following:
- Use a straight edge and a feeler gage to measure the exhaust manifold cylinder head deck for warpage.
Caution: Wear safety glasses in order to avoid eye damage.
| • | Exhaust manifold-to-cylinder head gasket surface for excessive scratches or gouging. |
| • | Take down studs for damaged threads |
| • | Loose or damaged heat shield (2) or missing bolts (3) |
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.
