Nissan Frontier D40. Manual - part 829

OIL PUMP

LU-27

< ON-VEHICLE REPAIR >

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OIL PUMP

Exploded View

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Removal and Installation

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REMOVAL

1.

Disconnect the battery negative terminal. Refer to 

PG-84, "Removal and Installation"

.

2.

Remove the RH and LH wheels and tires. Refer to 

WT-46, "Rotation"

.

3.

Remove the RH and LH front fender protectors. Refer to 

EXT-20, "Removal and Installation"

.

4.

Remove the air duct and resonator assembly and the air cleaner case (upper). Refer to 

EM-139,

"Exploded View"

.

5.

Remove timing chain (primary) only. Refer to 

EM-173, "Removal and Installation"

.

6.

Remove the oil pump assembly.

INSTALLATION

Installation is in the reverse order of removal, paying attention to the following.
• When installing, align crankshaft flat faces with inner rotor flat faces.

INSPECTION AFTER INSTALLATION

1.

Check the engine oil level. Refer to 

LU-21, "Inspection"

.

2.

Start the engine and check for engine oil leaks.

3.

Stop engine and wait for 10 minutes.

4.

Check the engine oil level and adjust engine oil level as required. Refer to 

LU-21, "Inspection"

.

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

PBIC2826E

LU-28

< DISASSEMBLY AND ASSEMBLY >

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OIL PUMP

DISASSEMBLY AND ASSEMBLY

OIL PUMP

Disassembly and Assembly

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DISASSEMBLY

1.

Remove oil pump cover.

2.

Remove inner rotor and outer rotor from oil pump body.

3.

Remove the regulator valve plug, regulator valve spring and regulator valve.

INSPECTION AFTER DISASSEMBLY 

Clearance of Oil Pump Parts

• Measure radial clearance using a suitable tool.

• Measure side clearance using suitable tools.

• Calculate the clearance between inner rotor and oil pump body as

follows.

1.

Measure the inner diameter of oil pump body to brazed portion
(position 5) using suitable tool.

2.

Measure the outer diameter of protruded portion of inner rotor
(position 6) using suitable tool.

3.

Calculate the clearance using the following formula.
• (Clearance) = (Inner diameter of oil pump body) - (Outer diameter of inner rotor)

Regulator Valve Clearance

Body to outer rotor (position 1)

: 0.120 - 0.195 mm (0.0047 - 0.0077 in)

Inner rotor to outer rotor tip (position 2)

: 0.060 - 0.160 mm (0.0024 - 0.0063 in)

PBIC2827E

Body to inner rotor (position 3)

: 0.030 - 0.070 mm (0.0012 - 0.0028 in)

Body to outer rotor (position 4)

: 0.050 - 0.090 mm (0.0020 - 0.0035 in)

PBIC2828E

PBIC0821E

Inner rotor to brazed portion of housing 
clearance

: 0.045 - 0.091 mm (0.0018 - 0.0036 in)

OIL PUMP

LU-29

< DISASSEMBLY AND ASSEMBLY >

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Check regulator valve to oil pump cover clearance using the following formula.
• (Clearance) = D

1

 (Valve hole diameter) - D

2

 (Outer Diameter of

valve)

CAUTION:

• Coat regulator valve with engine oil.
• Check that it falls smoothly into the regulator valve hole by its

own weight.

ASSEMBLY

Installation is in the reverse order of removal.
NOTE:
Install oil pump inner rotor with the groove faced and oil pump outer
rotor with the punch mark to oil pump cover side.

Regulator valve to oil pump cover

: 0.025 - 0.070 mm (0.0010 - 0.0028 in)

PBIC2829E

PBIC2830E

LU-30

< SERVICE DATA AND SPECIFICATIONS (SDS) 

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SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

Standard and Limit

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OIL PRESSURE

Unit: kPa (kg/cm

2

, psi)

*: Engine oil temperature at 80

°

C (176

°

F) 

OIL PUMP

Unit: mm (in)

REGULATOR VALVE

Unit: mm (in)

ENGINE OIL CAPACITY (APPROXIMATE)

Unit: 

 (US qt, Imp qt)

Engine speed

Approximate discharge oil pressure*

Idle speed

More than 98 (1.0, 14)

2,000 rpm

More than 294 (3.0, 43) 

Body to outer rotor 

0.120 - 0.195 (0.0047 - 0.0077)

Inner rotor to outer rotor tip 

0.060 - 0.160 (0.0024 - 0.0063)

Body to inner rotor 

0.030 - 0.070 (0.0012 - 0.0028)

Body to outer rotor 

0.050 - 0.090 (0.0020 - 0.0035)

Inner rotor to brazed portion of housing 

0.045 - 0.091 (0.0018 - 0.0036)

Regulator valve to oil pump cover

0.025 - 0.070 (0.0010 - 0.0028)

Drain and refill

With oil filter change

5.1 (5-3/8, 4-1/2)

Without oil filter change

4.8 (5-1/8, 4-1/4)

Dry engine (Overhaul)

6.3 (6-5/8, 5-1/2)