TM 10-3930-659-10 Table 3-1.  Troubleshooting (Con’t). MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 6.  ABNORMAL ENGINE NOISE. Check engine oil level. If engine oil level is low, fill to correct level (see LO 10-3930 659-12).  If engine oil level is correct, notify Unit Maintenance. 7.  LOW ENGINE OIL PRESSURE. Check engine oil level. If engine oil level is low, fill to correct level (see LO  10-3930-  659-12).    If  engine  oil  level  is  correct, notify Unit Maintenance. 8.  ENGINE OVERHEATS. WARNING DO  NOT  remove  radiator  fill  cap  unless  engine  Is  cold.    This  Is  a pressurized   cooling   system   and   escaping   steam,   hot   water,   or coolant will cause serious burns. Step 1.  Check coolant level in see-through coolant recovery tank. If coolant level Is low, obtain coolant mixture from Unit Maintenance and fill coolant recovery tank to correct level (see LO 10-3930-659-12). Step 2.  Check outside of radiator for obstructions. Remove anything that blocks or impedes air flow. Step 3.  Check engine oil level. If engine oil level is low, fill to correct level (see LO  10-3930-  659-12).    If  engine  oil  level  is  correct, notify Unit Maintenance. Step 4.  Check cooling system for damaged drive belts or leaking hoses. Notify Unit Maintenance. 3-6