42. Exhaust Manifold Clean and Inspect
Exhaust Manifold Cleaning and InspectionImportant:
^ Do not reuse the exhaust manifold-to-cylinder head gaskets. Upon installation of the exhaust manifold, install a NEW gasket. An improperly installed gasket or leaking exhaust system may effect On-Board Diagnostics (OBD) II system performance.
^ Inspect the exhaust manifold for cracks near the mounting holes (1-5).
1. Clean the exhaust manifold with solvent.
Caution: Refer to Safety Glasses Caution in Service Precautions.
2. Dry the exhaust manifold with compressed air.
3. Clean the exhaust manifold mating surface.
4. Use a straight edge and a feeler gage and measure the exhaust manifold mounting face for warpage.
Exhaust Manifold Maximum Warpage 0.70 mm (0.0276 inch)
5. If the warpage is greater than the maximum, replace the exhaust manifold.