TM 5-3805-258-24-1
T R O U B L E S H O O T I N G
T E S T I N G
A N D
A D J U S T I N G
Defect In
Defect in
10. OIL IN COOLING SYSTEM
Cause
Correction
Core of Oil Cooler
Install a new core in the oil cooler.
Head Gasket
Install a new head gasket.
11. MECHANICAL NOISE (KNOCK) IN ENGINE
Cause
Correction
Failure of Bearing For Connecting
Inspect the bearing for the connecting rod and the bearing surface on
Rod
the crankshaft. Install new parts when necessary.
Damage to Timing Gears
Install new parts where necessary.
Damage to Crankshaft
Make replacement of the crankshaft.
Cause
Fuel System Leaks
12. FUEL CONSUMPTION TOO HIGH
Correction
Large changes in fuel consumption maybe the result. Inspect the fuel
system for leaks and make repairs as necessary.
Fuel and Combustion Noise (Knock)
Small increases in fuel consumption maybe the result of fuel nozzles
with defects, rough running, or factors causing loss of power. See
Item 3 and Item 6.
Wrong Fuel Injection Timing
Make an adjustment to fuel injection timing.
13. LOUD NOISE FROM VALVES OR VALVE DRIVE COMPONENTS
Cause
Correction
Damage to Valve Spring(s)
Make replacement of parts with damage.
Damage to Camshaft
Make replacement of parts with damage. Clean engine thoroughly.
Damage to Valve Lifter
Clean engine thoroughly. Make a replacement of the camshaft and
valve lifters. Look for valves that do not move freely. Make an
adjustment to valve clearance, See the Subject VALVE CLEAR-
ANCE in Testing and Adjusting.
Damage to Valve(s)
Make a replacement of the valve(s) and make an adjustment as
necessary.
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