Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSINFINITI2006FX35 AWD V6-3.5L (VQ35DE)REPAIR AND DIAGNOSISENGINE, COOLING AND EXHAUSTENGINEENGINE LUBRICATIONOIL PUMPSERVICE AND REPAIR
2006 Infiniti FX35 AWD V6-3.5L (VQ35DE)
Oil Pump: Service and Repair
2006 Infiniti FX35 AWD V6-3.5L (VQ35DE)SECTION Service and Repair
OIL PUMP
Removal and Installation
REMOVAL
1. Remove oil pans (lower and upper) and oil strainer.
2. Remove front timing chain case and timing chain (primary).
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 AFTER INSTALLATION
1. Check the engine oil level.
2. Start the engine, and check there is no leaks of engine oil.
3. Stop the engine and wait for 10minutes.
4. Check the engine oil level and adjust the level.
Disassembly and Assembly
DISASSEMBLY
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.
INSPECTION AFTER DISASSEMBLY
Oil Pump Clearance
^ Measure the clearance with feeler gauge.
^ Clearance between oil pump outer rotor and oil pump body (position 1)
Standard: 0.114 - 0.260 mm (0.004 - 0.010 inch)
^ Tip clearance between oil pump inner rotor and oil pump outer rotor (position 2)
Standard: Below 0.180 mm (0.007 inch)
^ Measure the clearance with feeler gauge and straightedge.
^ Side clearance between oil pump inner rotor and oil pump body (position 3)
Standard: 0.030 - 0.070 mm (0.001 - 0.003 inch)
^ Side clearance between oil pump outer rotor and oil pump body (position 4)
Standard: 0.050 - 0.110 mm (0.002 - 0.004 inch)
^ Calculate the clearance between oil pump inner rotor and oil pump
OIL PUMP BODY INNER DIAMETER
- Measure the inner diameter of oil pump body with inside micrometer. (Position 5)
OIL PUMP INNER ROTOR OUTER DIAMETER
- Measure the outer diameter of protruded portion of oil pump inner rotor with micrometer. (Position 6)
OIL PUMP INNER ROTOR TO OIL PUMP BODY CLEARANCE
- (Clearance) = (Oil pump body inner diameter) - (Oil pump inner rotor outer diameter)
Standard: 0.045 - 0.091 mm (0.0018 - 0.0036 inch)
^ If measured/calculated values are out of the standard, replace oil pump assembly.
Regulator Valve Clearance
(Clearance) = (Valve hole diameter) - (Regulator valve outer diameter)
Standard: 0.040 - 0.097 mm (0.0016- 0.0038 inch)
^ If the calculated value is out of the standard, replace oil pump assembly.
CAUTION:
^ Coat regulator valve with engine oil.
^ Make sure that it falls smoothly into valve hole by its own weight.
ASSEMBLY
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.
Removal and Installation
REMOVAL
1. Remove oil pans (lower and upper) and oil strainer.
2. Remove front timing chain case and timing chain (primary).
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 AFTER INSTALLATION
1. Check the engine oil level.
2. Start the engine, and check there is no leaks of engine oil.
3. Stop the engine and wait for 10minutes.
4. Check the engine oil level and adjust the level.
Disassembly and Assembly
DISASSEMBLY
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.
INSPECTION AFTER DISASSEMBLY
Oil Pump Clearance
^ Measure the clearance with feeler gauge.
^ Clearance between oil pump outer rotor and oil pump body (position 1)
Standard: 0.114 - 0.260 mm (0.004 - 0.010 inch)
^ Tip clearance between oil pump inner rotor and oil pump outer rotor (position 2)
Standard: Below 0.180 mm (0.007 inch)
^ Measure the clearance with feeler gauge and straightedge.
^ Side clearance between oil pump inner rotor and oil pump body (position 3)
Standard: 0.030 - 0.070 mm (0.001 - 0.003 inch)
^ Side clearance between oil pump outer rotor and oil pump body (position 4)
Standard: 0.050 - 0.110 mm (0.002 - 0.004 inch)
^ Calculate the clearance between oil pump inner rotor and oil pump
OIL PUMP BODY INNER DIAMETER
- Measure the inner diameter of oil pump body with inside micrometer. (Position 5)
OIL PUMP INNER ROTOR OUTER DIAMETER
- Measure the outer diameter of protruded portion of oil pump inner rotor with micrometer. (Position 6)
OIL PUMP INNER ROTOR TO OIL PUMP BODY CLEARANCE
- (Clearance) = (Oil pump body inner diameter) - (Oil pump inner rotor outer diameter)
Standard: 0.045 - 0.091 mm (0.0018 - 0.0036 inch)
^ If measured/calculated values are out of the standard, replace oil pump assembly.
Regulator Valve Clearance
(Clearance) = (Valve hole diameter) - (Regulator valve outer diameter)
Standard: 0.040 - 0.097 mm (0.0016- 0.0038 inch)
^ If the calculated value is out of the standard, replace oil pump assembly.
CAUTION:
^ Coat regulator valve with engine oil.
^ Make sure that it falls smoothly into valve hole by its own weight.
ASSEMBLY
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.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.