TM 5-3895-373-34
Table 2-1. Engine Troubleshooting - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
7.
ROUGH OR ERRATIC RUNNING/EXCESSIVE ENGINE VIBRATION.
Step 1.
Perform steps I through 5 of MALFUNCTION 1. ENGINE FAILS TO START OR FAILS TO START
EASILY.
Step 2.
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
8. OVERHEATING.
Step 3.
Remove and inspect intake and exhaust valves, push rods, springs, and guides. Refer to
paragraph 2.17.
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.
Step 4.
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.
8.
OVERHEATING.
NOTE
Coolant mixed with oil produces a milky discoloration and will cause low oil pressure.
Step 1.
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.
Step 2.
Remove water pump per TM 5-3895-373-20.
If water pump is defective, repair water pump per paragraph 2.23.
Step 3.
Check for restriction in water jacket per paragraph 2.17.
Remove restriction.
Step 4.
Close front top left across door per TM 5-3895-373-10.
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