Nissan Frontier. Manual - part 739

INTAKE MANIFOLD

EM-145

< REMOVAL AND INSTALLATION >

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INTAKE MANIFOLD

Exploded View

INFOID:0000000009478111

Removal and Installation

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NOTE:

When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spill-

ing.

REMOVAL

1. Remove intake manifold collector. Refer to 

EM-142, "Removal and Installation"

.

2. Remove fuel tube and fuel injector assembly. Refer to 

EM-162, "Removal and Installation"

.

3. Loosen nuts and bolts with power tool in reverse order as shown

to remove intake manifold.

4. Remove gaskets.

CAUTION:

Cover engine openings to avoid entry of foreign materials.

INSPECTION AFTER REMOVAL

Surface Distortion

1.

Intake manifold

2.

Gasket

PBIC2878E

PBIC2879E

EM-146

< REMOVAL AND INSTALLATION >

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INTAKE MANIFOLD

• Check the surface distortion of the intake manifold mating surface

with straightedge and feeler gauge.

• If it exceeds the limit, replace intake manifold.

INSTALLATION

Installation is in the reverse order of removal. Note the following:

Intake Manifold

• If stud bolts were removed from cylinder head, install them and tighten to the specified torque.

• Tighten all nuts and bolts to the specified torque in two or more

steps in numerical order as shown.

• Adjust neutral position steering angle sensor. 

• Erase CPU memory.

• Perform the "Throttle Valve Closed Position Learning" when harness connector of electric throttle control

actuator is disconnected. Refer to 

EC-591, "Throttle Valve Closed Position Learning"

.

• Perform the "Idle Air Volume Learning" and "Throttle Valve Closed Position Learning" when electric throttle

control actuator is replaced. Refer to 

EC-591, "Idle Air Volume Learning"

.

Limit

: 0.1 mm (0.004 in)

PBIC0870E

Intake manifold studs

: 10.8 N·m (1.1kg-m, 8 ft-lb)

Intake manifold bolt and nuts
1st step

: 7.4 N·m (0.75 kg-m, 65 in-lb)

2nd step and after

: 30.0 N·m (3.1 kg-m, 22 ft-lb)

PBIC2879E

EXHAUST MANIFOLD AND THREE WAY CATALYST

EM-147

< REMOVAL AND INSTALLATION >

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EXHAUST MANIFOLD AND THREE WAY CATALYST

Exploded View

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Removal and Installation (Three Way Catalyst)

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WARNING:

Perform the work when the exhaust and cooling system have cooled sufficiently.

REMOVAL 

1. Remove the front wheel and tire. Refer to 

WT-48, "Adjustment"

.

2. Remove the mud guard and front fender protector. Refer to 

EXT-27, "Removal and Installation of Front

Fender Protector"

.

3. Remove the exhaust manifold cover bolts.
4. Remove the center exhaust tube, main muffler and front exhaust tube. Refer to 

EX-5, "Exploded View"

.

5. Disconnect harness connector from the air fuel ratio sensor 1.
6. Remove the three way catalyst nuts and remove the three way catalyst.
7. Remove the air fuel ratio sensor 1 using Tool, if necessary.

1.

Cylinder head (LH)

2.

Cylinder head (RH)

3.

Exhaust manifold studs (RH)

4.

Gasket

5.

Exhaust manifold nuts (RH)

6.

Exhaust manifold (RH)

7.

Exhaust manifold cover (RH)

8.

Three way catalyst (RH)

9.

Three way catalyst studs (RH)

10. Seal ring

11. Three way catalyst nuts (RH)

12. Three way catalyst nuts (LH)

13. Seal ring

14. Three way catalyst studs (LH)

15. Three way catalyst (LH)

16. Exhaust manifold cover (LH)

17. Exhaust manifold (LH)

18. Exhaust manifold nuts (LH)

19. Gasket

20. Exhaust manifold studs (LH)

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EM-148

< REMOVAL AND INSTALLATION >

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EXHAUST MANIFOLD AND THREE WAY CATALYST

CAUTION:

• Be careful not to damage air fuel ratio sensor 1.

• Discard any air fuel ratio sensor 1 which has been dropped from a height of more than 0.5 m

(19.7 in) onto a hard surface such as a concrete floor; replace with a new sensor. 

INSTALLATION

Installation is in the reverse order of removal.

• Tighten air fuel ratio sensor 1 to specification, if removed.

CAUTION:

• Do not over tighten air fuel ratio sensor 1. Doing so may cause damage to air fuel ratio sensor 1,

resulting in the “MIL” coming on.

• Before installing a new air fuel ratio sensor 1, clean exhaust system threads using oxygen sensor

thread cleaner and apply anti-seize lubricant.

Removal and Installation (Exhaust Manifold)

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REMOVAL (LH)

WARNING:

Perform the work when the exhaust and cooling system have cooled sufficiently.

NOTE:

When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spill-

ing.
1. Remove engine room cover using power tool. Refer to 

EM-140, "Removal and Installation"

.

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

EM-141, "Removal and

Installation"

.

3. Remove engine under cover. Refer to 

EXT-15, "Removal and Installation"

.

4. Partially drain engine coolant. Refer to 

CO-40, "Changing Engine Coolant"

.

5. Remove three way catalyst (LH). Refer to 

EM-147, "Removal and Installation (Three Way Catalyst)"

.

6. Remove oil level gauge and oil level gauge guide. Refer to 

EM-151, "Exploded View"

.

7. Disconnect water hoses at heater pipe. Refer to 

CO-57, "Exploded View"

.

8. Remove heater pipe from cylinder head (LH). Refer to 

CO-57, "Exploded View"

.

9. Loosen nuts in reverse order as shown.

•

: Front

NOTE:

Disregard the numerical order No. 7 and 8 in removal.

10. Remove exhaust manifold (LH).
11. Remove gaskets.

CAUTION:

Cover engine openings to avoid entry of foreign materials.

INSPECTION AFTER REMOVAL

Tool number 

: KV991J0050 (J-44626)

Air fuel ratio sensor

: 50.0 N·m (5.1 kg-m, 37 ft-lb)

Oxygen sensor thread cleaner

: —   (J-43897-12) 

Oxygen sensor thread cleaner

: —   (J-43897 18)

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