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K20Z3 engine
Torque: 16 N·m (1.6 kgf·m, 12 lbf·ft)
8-14Engine Lubrication
Oil Jet Inspection
1.2 mm (0.05 in.)
1.2 mm
(0.05 in.)
A
B
1. Remove the oil jet, and inspect it as follows. Make sure that a 1.1 mm (0.04 in.) diameter drillwill go through the nozzle hole (A) (1.2 mm
(0.05 in.) diameter).
Insert the other end of a 1.1 mm (0.04 in.) drill into the oil intake (1.2 mm (0.05 in.) diameter).
Make sure the check ball (B) moves smoothly and
has a stroke of approximately 4.0 mm (0.16 in.).
Check the oil jet operation with an air nozzle. It should take at least 200 kPa (2.0 kgf/cm , 28 psi)
to unseat the check ball.
NOTE: Replace the oil jet assembly if the nozzle is
damaged or bent.
2. Carefully install the oil jet. The mounting torque is critical.
2
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Page 266 of 2893
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Exploded View
8-15
Oil Pump Overhaul
6x1.0mm
12 N·m
(1.2 kgf·m, 8.7 lbf·ft)K20Z2 engine:
8x1.25mm
27 N·m
(2.8 kgf·m, 20 lbf·ft)
UPPER BALANCER
SHAFT HOLDER DOWEL PINS
BALANCER SHAFT
BEARINGS
REAR BALANCER
SHAFT
FRONT BALANCER
SHAFT
LOWER BALANCER
SHAFT HOLDER
OUTER ROTOR
INNER ROTOR
RELIEF VALVE
SPRING
SEALING BOLT
39 N·m
(4.0 kgf·m, 29 lbf·ft) OIL PUMP SPROCKET
6x1.0mm
12 N·m
(1.2 kgf·m, 8.7 lbf·ft) 10x1.25mm
44 N·m
(4.5 kgf·m, 33 lbf·ft)
PUMP HOUSING
DOWEL PIN
6x1.0mm
12 N·m
(1.2 kgf·m, 8.7 lbf·ft)
BAFFLE PLATE
K20Z3 engine:
8x1.25mm
28 N·m
(2.9 kgf·m, 21 lbf·ft) 16 °
(cont’d)
Apply new engine oil to
the bolt threads.
The valve must slide freely
in housing bore.
Replace the oil pump
as an assembly if scored.
Apply new engine oil to
the bolt threads.
Apply new engine oil to
the bolt threads.
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DYNOMITE -2009-
Page 267 of 2893
Oil Pump Removal
8-16Engine Lubrication
Oil Pump Overhaul (cont’d)
A
B
A
AB
1. Turn the crankshaft pulley so its top dead center (TDC) mark (A) lines up with the pointer (B).
2. Remove the oil pan (see page 7-11).
3. Remove and discard the oil pump chain tensioner. 4. To hold the rear balancer shaft, insert a 6 mm long
pin punch (Snap-on PPC 108LA or equivalent) (A)
into the maintenance hole in the lower balancer
shaft holder and through the rear balancer shaft.
5. Loosen the oil pump sprocket mounting bolt.
6. Remove the oil pump sprocket (A), then remove the oil pump (B).
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Page 268 of 2893

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Oil Pump Inspection
Inner Rotor-to-Outer Rotor Radial Clearance
Standard (New): 0.06 0.16 mm (0.002 0.006 in.)
Service Limit: 0.20 mm (0.008 in.) Pump Housing-to-Rotor Axial Clearance
Standard (New): 0.035 0.070 mm
(0.0014 0.0028 in.)
Service Limit: 0.12 mm (0.005 in.)
Pump Housing-to-Outer Rotor Radial Clearance
Standard (New): 0.15 0.21 mm (0.006 0.008 in.)
Service Limit: 0.23 mm (0.009 in.)
8-17
A
B B
A
A
B
1. Remove the pump housing.
2. Check the inner-to-outer rotor radial clearance
between the inner rotor (A) and the outer rotor (B).
If the inner-to-outer rotor radial clearance exceeds
the service limit, replace the oil pump. 3. Check the pump housing-to-rotor axial clearance
between the rotor (A) and the pump housing (B). If
the pump housing-to-rotor axial clearance exceeds
the service limit, replace the oil pump.
4. Check the pump housing-to-outer rotor radial clearance between the outer rotor (A) and the
pump housing (B). If the pump housing-to-outer
rotor radial clearance exceeds the service limit,
replace the oil pump.
5. Inspect both rotors and the pump housing for scoring or other damage. Replace parts if
necessary.
(cont’d)
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Balancer Shaft Inspection
Balancer Shaft End Play
Front Balancer Shaft:
Standard (New): 0.063 0.108 mm (0.0025 0.0043 in.)
Service Limit: 0.14 mm (0.0055 in.)
Rear Balancer Shaft:
Standard (New): 0.063 0.108 mm (0.0025 0.0043 in.)
Service Limit: 0.14 mm (0.0055 in.)
8-18 Engine Lubrication
Oil Pump Overhaul (cont’d)
A
B
C D
1. Seat the balancer shaft by pushing it away from the
oil pump sprocket end of the oil pump.
2. Zero the dial indicator against the end of the balancer shaft, then push the balancer shaft back
and forth and read the end play. 3. Remove the pump housing.
4. Remove the baffle plate (A) and the upper balancer
shaft holder (with bearings) (B), then remove the
front balancer shaft (C) and the rear balancer
shaft (D).
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Page 270 of 2893
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Bearing Inner Diameter
Front:
Standard (New): 20.000 20.020 mm
(0.7874 0.7882 in.)
Service Limit: 20.03 mm (0.789 in.)
Rear:
Standard (New): 24.000 24.020 mm (0.9449 0.9457 in.)
Service Limit: 24.03 mm (0.946 in.)
Front
Rear Journal Diameter
Front:
Standard (New): 19.938 19.950 mm
(0.7850 0.7854 in.)
Service Limit: 19.92 mm (0.784 in.)
Rear:
Standard (New): 23.938 23.950 mm (0.9424 0.9429 in.)
Service Limit: 23.92 mm (0.942 in.)
Front
Rear
8-19
5. Measure the inner diameter of the No. 1 bearing for the front balancer shaft hole and the rear balancer
shaft hole. 6. Measure the diameters of the No. 1 journals on the
front balancer shaft and the rear balancer shaft.
(cont’d)
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No. 2 Journal Oil Clearance
Standard (New): 0.060 0.120 mm
(0.0024 0.0047 in.)
Service Limit: 0.15 mm (0.006 in.)
8-20 Engine Lubrication
Oil Pump Overhaul (cont’d)
6x1.0mm
12 N·m
(1.2 kgf·m, 8.7 lbf·ft)
K20Z2 engine:
8x1.25mm
27 N·m
(2.8 kgf·m, 20 lbf·ft)
K20Z3 engine:
8x1.25mm
28 N·m
(2.9 kgf·m, 21 lbf·ft)
16 °
7. Clean both balancer shaft No. 2 journals and the
bearing halves with a clean shop towel, then install
the balancer shafts into the lower balancer shaft
holder.
8. Place one strip of plastigage across each No. 2 journal.
9. Reinstall the bearings and the upper balancer shaft holder, then tighten the bolts.
NOTE: Do not rotate the balancer shafts during inspection.
After torquing, tighten the three 8 mm bolts extra 16 ° (K20Z3 engine). 10. Remove the upper balancer shaft holder and the
bearings again, and measure the widest part with
the plastigage. If the balancer shaft No. 2 journal oil
clearance is out-of-tolerance, install new bearings,
and recheck. If it is still out-of-tolerance, replace the
balancer shafts.
11. Align the punch mark on the rear balancer shaft in the center of the two punch marks on the front
balancer shaft, then install the balancer shafts on
the lower balancer shaft holder.
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Oil Pump Installation
8-21
B
C
6x1.0mm
12 N·m
(1.2 kgf·m, 8.7 lbf·ft) A
K20Z2 engine:
8x1.25mm
27 N·m
(2.8 kgf·m, 20 lbf·ft)
K20Z3 engine:
8x1.25mm
28 N·m
(2.9 kgf·m, 21 lbf·ft)
16 °
6x1.0mm
12 N·m
(1.2 kgf·m, 8.7 lbf·ft) A
B
B A
12. Apply new engine oil to the threads of the 8 mm bolts (A).
NOTE: After torquing, tighten the three 8 mm bolts
extra 16 ° (K20Z3 engine).
13. Install the upper balancer shaft holder (B) and the baffle plate (C).
14. Install the pump housing. 1. Make sure the No. 1 piston top dead center (TDC)
mark (A) lines up with the pointer (B).
2. Align the dowel pin (A) on the rear balancer shaft with the mark (B) on the oil pump.
(cont’d)
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