Table 2-1. Engine Troubleshooting - Continued.
TEST OR INSPECTION
ROUGH OR ERRATIC RUNNING/EXCESSIVE ENGINE VIBRATION.
Perform steps I through 5 of MALFUNCTION 1. ENGINE FAILS TO START OR FAILS TO START
Check if engine temperature is 194°F (90°C) or greater.
If engine temperature is 194°F (90°C) or greater, perform steps 1I and 2 of MALFUNCTION
Remove and inspect intake and exhaust valves, push rods, springs, and guides. Refer to
Replace or repair intake/exhaust valves and valve seat inserts showing signs of pitting.
Replace push rods, springs and guides as necessary. Refer to paragraph 2.17.
Check for broken/worn, or sticking piston rings, worn/damaged bearings, or incorrect piston height.
Refer to paragraph 2.17.
Replace worn or damaged components. Refer to paragraph 2.17.
Coolant mixed with oil produces a milky discoloration and will cause low oil pressure.
Open front top left access door per TM 5-3895-373-10. Remove dipstick and check if engine oil has
a milky discoloration or is a brown sludge.
If coolant is present in oil, perform step 1 of MALFUNCTION 4. LOW OIL PRESSURE.
Remove water pump per TM 5-3895-373-20.
If water pump is defective, repair water pump per paragraph 2.23.
Check for restriction in water jacket per paragraph 2.17.
Close front top left across door per TM 5-3895-373-10.