INTERNAL COMBUSTION ENGINES

This chapter is designed to help you understand the maintenance and repair of internal combustion engines. You as an EN2 should be able to describe the basic procedures used to test and repair diesel engines. Also, you should be able to identify the procedures used to troubleshoot diesel and gasoline engines. This chapter will cover the general procedures used to repair and overhaul gasoline engines; the procedures used to inspect, test, and repair jacking gear; and the procedures used to troubleshoot and repair fuel and oil purifiers.

To help ensure that an engine will operate efficiently, you must follow its preventive maintenance schedule. By following the preventive maintenance schedule, you will reduce engine casualties and help the engine achieve its normal number of operating hours between overhaul periods.

When you must finally perform an engine repair or overhaul, take the following precautions:

l Plan the work in definite steps, so you can perform it smoothly.

l Have the necessary tools and parts on hand before you begin a repair or overhaul.

l Have the necessary forms ready to record the clearances, dimensions, and other vital measurement readings that must be kept as part of the engines history.

l Always check precision measuring instruments before you use them; then recheck your readings. The first reading may not be correct.

l Keep the work area clean. Do not allow oil to accumulate on the deck or on the tools. Place the tools or parts neatly away from the immediate area.

The test, maintenance, and repair procedures presented in this chapter are general in nature. The specific procedures vary with different engines. Before you begin a maintenance or repair procedure, consult the manufacturers technical manual or the equipments preventive maintenance schedules. They are valuable sources of information on tests, maintenance, and repairs.