DL06K Interim Tire-4 Diesel Engine Technical Information
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Condition Causes Remedies
5) Engine noisy For noises arise compositely such as
rotating parts, lapping parts etc.,
there is necessity to search the
cause of noises accurately.
(1) Crankshaft ● As the wear of bearing or crankshaft
progress, the oil clearances increase
Replace bearing & grind
crankshaft
● Lopsided wear of crankshaft Grind or replace
● Oil supply insufficient due to oil
passage clogging
Clean oil passage
● Stuck bearing Replace bearing & grind
(2) Connecting-rod and
connecting-rod
bearing
● Lopsided wear of con rod bearing Replace bearing
● Lopsided wear of crank pin Grind crankshaft
● Connecting rod distortion Repair or replace
● Stuck bearing Replace & grind crankshaft
● Oil supply insufficiency as clogging
at oil passage progresses
Clean oil passage
(3) Piston, piston pin &
piston ring
● Piston clearance increase as the
wear of piston and piston ring
progresses
Replace piston &
piston ring
● Wear of piston or piston pin Replace
● Piston stuck Replace piston
● Piston insertion poor Replace piston
● Piston ring damaged Replace piston
(4) Others ● Wear of crankshaft, thrust bearing Replace thrust bearing
● Camshaft end play increased Replace thrust plate
● Idle gear end play increased Replace thrust washer
● Timing gear backlash excessive Repair or replace
● Valve clearance excessive Adjust valve clearance
● Abnormal wear of tappet, cam Replace tappet, cam
● Turbocharger inner part damaged Repair or replace
6) Fuel consumption excessive ● Injection timing incorrect Check
● Fuel injection amount excessive Adjust
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