Quantcast LOUD COMBUSTION NOISE (SOUND)

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TROUBLESHOOTING
TESTING AND ADJUSTING
11. LOUD COMBUSTION NOISE (SOUND)
Cause:
Correction:
Bad Quality Fuel
Remove the fuel from the fuel tank. Install new fuel filters. Put a
good grade of clean fuel in the fuel tank.
Wrong Fuel Injection Timing
Make adjustment to timing. See Subject, FUEL TIMING.
Defect in Fuel Injector(s)
Make Reference to Item 7.
12. VALVE TRAIN NOISE (CLICKING)
Cause:
Correction:
Damage to Valve Spring(s), Locks, or Broken or
Install new parts where necessary. Broken locks can
Worn Valve Lifter
cause the valve to get into the cylinder. This will cause much
damage.
Not Enough Lubrication
Check lubrication in valve compartment. There must be a strong
flow of oil at engine high rpm, but only a small flow of oil at low
rpm. Oil passages must be clean, especially those that send oil
to the cylinder head.
Too Much Valve Clearance
Make adjustment according to the Subject, VALVE CLEARANCE.
Damage to Valve(s)
Make a replacement of the valve(s) and make an adjustment as
necessary.
13. OIL IN COOLING SYSTEM
Cause:
Correction:
Defect In Core of Engine Oil Cooler
Install a new engine oil cooler.
Failure of Cylinder Head Gasket or Water Seals
Check cylinder liner projection. Install a new cylinder head gasket
and new water seals in the spacer plate. Tighten the bolts that
hold the cylinder head according to the Specifications.
14. MECHANICAL NOISE (KNOCK) IN ENGINE
Cause:
Correction:
Failure of Bearing For Connecting Rod
Inspect the bearings for the connecting rods and the bearing
surfaces (journals) on the crankshaft. Install new parts where
necessary.
Damaged Gears
Install new parts where necessary.
Damaged Crankshaft
Make replacement of the crankshaft.
Defect in Attachment
Repair or install new components.
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