Service manual

ENG
4-53
REMOVING THE BALANCER WEIGHT
GEAR AND OIL PUMP
1. Straighten the lock washer tab.
2. Remove:
• Balancer weight gear nut
• Lock washer
• Balancer weight gear
N
O
TE:N
O
TE:
Place the aluminum plate between balancer
drive gear and balancer weight gear ,
and then loosen the balancer weight gear nut
.
3. Remove:
• Oil pump assembly
CHECKING THE OIL PUMP
1. Check:
• Oil pump driven gear
• Oil pump housing
• Oil pump cover
Cracks/damage/wear → Replace the
defective part(s).
2. Measure:
• Inner-rotor-to-outer-rotor-tip clearance
• Outer-rotor-to-oil-pump-housing clearance
• Oil-pump-housing-to-inner-rotor-and-outer-
rotor clearance
Out of specification → Replace the oil
pump.
Inner rotor
Outer rotor
Oil pump housing
OIL PUMP AND BLANCER WEIGHT GEAR