Introduction

WARNING: TO AVOID THE POSSIBILITY OF PERSONAL INJURY OR DAMAGE TO THE VEHICLE, DO NOT OPERATE THE ENGINE WITH THE HOOD OPEN UNTIL THE FAN BLADE HAS FIRST BEEN EXAMINED FOR POSSIBLE CRACKS AND SEPARATION.

These engines incorporate:
- closed-type Positive Crankcase Ventilation (PCV) system.
- exhaust emission control system.

To maintain the required exhaust emission levels, the following components must be kept in good operating condition and meet recommended adjustment specifications:
- engine
- fuel system
- ignition system
- emissions system
- exhaust system

Make sure that the following engine components are not serviceable before replacing damaged or worn engine components:
- crankshaft
- cylinder heads
- valve guides
- intake valve
- exhaust valve
- camshafts
- cylinder block