TROUBLESHOOTING
TESTING AND ADJUSTING
TM 5-3805-263-14&P-2
17. LITTLE OR NO VALVE CLEARANCE
Cause
Worn Valve Seat or Face of Valve
Correction
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
Dirt in Lubrication Oil
Air Inlet Leaks
Fuel Leakage Into Lubrication Oil
Correction
Remove dirty lubrication oil. Install a new oil filter element. Put
clean oil in the engine.
Inspect all gaskets and connections. Make repairs if leaks are
present.
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
Failure of Oil Cooler Core
Failure of Cylinder Head Gasket
Crack or Defect in Cylinder Head
Crack or Defect in Cylinder Block
Failure of Seals for Cylinder Liners
Correction
Install a new core for the oil cooler.
Install a new cylinder head gasket. Tighten the bolts holding the
cylinder head, according to Specifications.
Install a new cylinder head.
Install a new cylinder block.
Make a replacement of the seals.
20. TOO MUCH BLACK OR GRAY SMOKE
Cause
Not Enough Air For Combustion
Bad Fuel Injection Nozzle(s)
Correction
Check air cleaner for restrictions. Check inlet manifold pressure.
Inspect turbocharger for correct operation.
Test all nozzles. Install new nozzles if test shows replacement is
needed.
Wrong Fuel Injection Timing
Make adjustment to timing.
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