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 TROUBLESHOOTING
TESTING AND ADJUSTMENT
Problem
Cause
Correction
17. ENGINE HAS EARLY WEAR
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 found.
Fuel Leakage Into Lubrication Oil
This will cause high fuel consumption and low engine oil pressure. Make repairs if
leaks are found. Install new parts where needed.
18. COOLANT IN LUBRICATION
Failure of Oil Cooler Core
Install a new core for the oil cooler.
OIL
Failure of Cylinder Head Gasket
Install a new cylinder head gasket. Tighten the bolts holding the cylinder head,
according to the 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 Front Cover Gasket
Install a new front cover gasket.
19. TOO MUCH BLACK OR GRAY
Not Enough Air For Combustion
Check air cleaner for restrictions. [Max. 25 in. (635 mm) of water].
SMOKE
Bad Fuel Injection Nozzle(s)
Install new fuel injection nozzle(s).
Wrong Fuel Injection Timing
Make adjustment to timing.
20. TOO MUCH WHITE OR BLUE
Too Much Lubrication Oil in Engine
Remove extra oil. Find where extra oil comes from. Put correct amount of oil in
SMOKE
engine. Do not put too much oil in engine.
Misfiring or Running Rough
Make reference to ITEM 2.
Wrong Fuel Injection Timing
Make adjustment to timing.
Worn Valve Guides
Reconditioning of cylinder head is needed.
Worn Piston Rings
Install new parts as necessary.
Defect in Timing Advance Unit
Replacement of timing advance unit is needed.
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