Nissan Titan. Manual — part 453

LU-14

< REMOVAL AND INSTALLATION >

OIL PUMP

OIL PUMP

Exploded View

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Removal and Installation

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REMOVAL

1. Remove timing chain cover. Refer to

EM-50, "Removal and Installation"

.

2. Remove the oil pump drive spacer.
3. Remove the oil pump.

INSTALLATION

Installation is in the reverse order of removal.

• Align the crankshaft key and the flat face of the inner rotor before

inserting the oil pump drive spacer.

• Rotate the oil pump inner rotor by hand until the crankshaft key

and the inner rotor are aligned properly.

• Then tap lightly until the oil pump drive spacer reaches the end.

INSPECTION AFTER INSTALLATION

1.

Oil pump body

2.

Outer rotor

3.

Inner rotor

4.

Oil pump cover

5.

Oil pump drive spacer

6.

Regulator valve

7.

Regulator spring

8.

Regulator plug

WBIA0415E

KBIA2512E

KBIA2490E

OIL PUMP

LU-15

< REMOVAL AND INSTALLATION >

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• Start the engine, and check for engine oil and engine coolant leaks and repair as necessary.

• Stop engine and wait 10 minutes.

• Check level and add engine oil as required. Refer to

LU-8

.

LU-16

< UNIT DISASSEMBLY AND ASSEMBLY >

OIL PUMP

UNIT 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 plug, regulator 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 outer diameter of protruded portion of inner rotor

(position 5) using suitable tool.

Body to outer rotor
(position 1)

: Refer to

LU-18

.

Inner rotor to outer
rotor tip (position 2)

: Refer to

LU-18

.

PBIC0139E

Body to inner rotor
(position 3)

: Refer to

LU-18

.

Body to outer rotor
(position 4)

: Refer to

LU-18

.

PBIC0140E

PBIC0141E

OIL PUMP

LU-17

< UNIT DISASSEMBLY AND ASSEMBLY >

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2. Measure the inner diameter of oil pump body to brazed portion

(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

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

Assembly is in the reverse order of disassembly.

NOTE:

Install the inner rotor and outer rotor with the punched marks on the

oil pump cover side.

PBIC0142E

Inner rotor to brazed portion of
housing clearance

: Refer to

LU-18

.

Regulator valve to oil
pump cover

: Refer to

LU-18

.

PBIC0143E

PBIC0144E