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
17. LITTLE OR NO VALVE CLEARANCE
Cause
Correction
Worn Valve Seat or Face of Valve
Reconditioning of cylinder head is needed. Make adjustment of valve
clearance, See the Subject VALVE CLEARANCE in Testing and
Adjusting.
18. ENGINE HAS EARLY WEAR
Cause
Correction
Dirt in Lubrication Oil
Remove dirty lubrication oil. Install a new oil filter element. Put
clean oil in the engine.
Air Inlet Leaks
Inspect all gaskets and connections. Make repairs if leaks are
present.
Fuel Leakage Into Lubrication Oil
This will cause high fuel consumption and low engine oil pressure.
Make repairs if leaks are present. Install new parts where needed.
19. COOLANT IN LUBRICATION OIL
Cause
Correction
Failure of Oil Cooler Core
Install a new core for the oil cooler.
Failure of Cylinder Head Gasket
Install a new cylinder head gasket. Tighten the bolts holding the
cylinder head, according to Specifications.
Crack or Defect in Cylinder Head
Install a new cylinder head.
Crack or Defect in Cylinder Block
Install a new cylinder block.
Failure of Seals for Cylinder Liners
Make a replacement of the seals.
20. TOO MUCH BLACK OR GRAY SMOKE
WARNING
If NBC exposure is suspected, all air filter media should be handled by personnel wearing protective
equipment. Consult your unit NBC Officer or NBC NCO for appropriate handling or disposal instruc-
tions.
Cause
Correction
Not Enough Air For Combustion
Check air cleaner for restrictions. Check inlet manifold pressure.
Inspect turbocharger for correct operation.
needed.
Wrong Fuel Injection Timing
Make adjustment to timing.
Bad Fuel Injection Nozzle(s)
Test all nozzles. Install new nozzles if test shows replacement is
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