Infiniti G37 Coupe. Manual — part 886
LU-12
< ON-VEHICLE REPAIR >
OIL PUMP
OIL PUMP
Exploded View
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Removal and Installation
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REMOVAL
1.
Remove oil pans (lower) and oil strainer. Refer to
.
2.
Remove front timing chain case and timing chain (primary). Refer to
.
3.
Remove oil pump assembly.
INSTALLATION
CAUTION:
Before installation, apply new engine oil to the parts as instructed in the figure.
Note the following, and install in the reverse order of removal.
• When installing, align crankshaft flat faces with oil pump inner rotor flat faces.
Inspection
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INSPECTION AFTER INSTALLATION
1.
Check the engine oil level. Refer to
.
2.
Start the engine, and check there is no leaks of engine oil.
3.
Stop the engine and wait for 10 minutes.
4.
Check the engine oil level and adjust the level. Refer to
.
1.
Oil pump body
2.
Oil pump outer rotor
3.
Oil pump inner rotor
4.
Oil pump cover
5.
Regulator valve plug
6.
Regulator valve spring
7.
Regulator valve spring
8.
Regulator valve
Refer to
for symbols in the figure.
JPBIA0242GB
OIL PUMP
LU-13
< DISASSEMBLY AND ASSEMBLY >
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DISASSEMBLY AND ASSEMBLY
OIL PUMP
Disassembly
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1.
Remove oil pump cover.
2.
Remove oil pump inner rotor and oil pump outer rotor from oil pump body.
3.
After removing regulator valve plug, remove regulator valve spring and regulator valve.
Assembly
INFOID:0000000001547638
Note the following, and assemble in the reverse order of disassembly.
• Install oil pump inner rotor with the groove faced to oil pump cover
side.
Inspection
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INSPECTION AFTER DISASSEMBLY
Oil Pump Clearance
• Measure the clearance with feeler gauge (C).
- Clearance between oil pump outer rotor and oil pump body [posi-
tion (B)]
- Tip clearance between oil pump inner rotor and oil pump outer
rotor [position (A)]
• Measure the clearance with feeler gauge and straightedge (A).
- Side clearance between oil pump inner rotor and oil pump body
[position (C)]
- Side clearance between oil pump outer rotor and oil pump body
[position (B)]
• Calculate the clearance between oil pump inner rotor and oil pump body as follows:
OIL PUMP BODY INNER DIAMETER
A
: Oil pump body side
B
: Oil pump cover side
C
: Groove
JPBIA0084ZZ
Standard
: Refer to
.
Standard
: Refer to
.
JPBIA0078ZZ
Standard
: Refer to
.
Standard
: Refer to
.
JPBIA0079ZZ
LU-14
< DISASSEMBLY AND ASSEMBLY >
OIL PUMP
- Measure the inner diameter of oil pump body with inside microme-
ter. [position (A)]
OIL PUMP INNER ROTOR OUTER DIAMETER
- Measure the outer diameter of protruded portion of oil pump inner
rotor (1) with micrometer. [position (B)]
OIL PUMP INNER ROTOR TO OIL PUMP BODY CLEARANCE
- (Clearance) = (Oil pump body inner diameter) – (Oil pump inner rotor outer diameter)
• If measured/calculated values are out of the standard, replace oil pump assembly.
Regulator Valve Clearance
(Clearance) = (Regulator valve hole diameter) – (Regulator valve
outer diameter)
• If the calculated value is out of the standard, replace oil pump
assembly.
CAUTION:
• Coat regulator valve with engine oil.
• Check that it falls smoothly into valve hole by its own weight.
JPBIA0080ZZ
Standard
: Refer to
.
1
: Regulator valve
2
: Oil pump body
Standard
: Refer to
.
JPBIA0081ZZ
SERVICE DATA AND SPECIFICATIONS (SDS)
LU-15
< SERVICE DATA AND SPECIFICATIONS (SDS)
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SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
Periodical Maintenance Specification
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ENGINE OIL CAPACITY (APPROXIMATE)
Unit:
(US qt, lmp qt)
Engine Oil Pressure
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Unit: kPa (kg/cm
2
, psi)
*: Engine oil temperature at 80
°
C (176
°
F)
Oil Pump
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Unit: mm (in)
Regulator Valve
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Unit: mm (in)
Drain and refill
With oil filter change
4.9 (5-1/8, 4-1/4)
Without oil filter change
4.6 (4-7/8, 4)
Dry engine (Overhaul)
5.7 (6, 5)
Engine speed
Approximate discharge pressure*
Idle speed
More than 98 (1.0, 14)
2,000 rpm
More than 294 (3.0, 43)
Oil pump body to oil pump outer rotor radial clearance
0.114 - 0.260 (0.0045 - 0.0102)
Oil pump inner rotor to oil pump outer rotor tip clearance
Below 0.180 (0.0071)
Oil pump body to oil pump inner rotor axial clearance
0.030 - 0.070 (0.0012 - 0.0028)
Oil pump body to oil pump outer rotor axial clearance
0.030 - 0.090 (0.0012 - 0.0035)
Oil pump inner rotor to brazed portion of housing clearance
0.045 - 0.091 (0.0018 - 0.0036)
Regulator valve to oil pump cover clearance
0.040 - 0.097 (0.0016 - 0.0038)
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