Nissan Pathfinder. Manual - part 549

EXHAUST MANIFOLD AND THREE WAY CATALYST

EM-35

< REMOVAL AND INSTALLATION >

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2. Install the exhaust manifold gasket in the direction shown. 

3. Install the exhaust manifold (bank 1) nuts and tighten to specifi-

cation in the order shown.

NOTE:

Number 7 and 8 are tightened a second time. 

CAUTION:

• Before installing a heated oxygen sensor or air fuel ratio (A/F) sensor, clean the exhaust mani-

fold threads using the oxygen sensor thread cleaner tool and apply anti-seize lubricant.

• Do not over-tighten the air fuel ratio (A/F) sensor or heated oxygen sensors. Doing so may cause

damage.

(A)

: Bank 1

(B)

: Triangle press

(C)

: Bank 2
: Engine front

PBIC4954E

: Engine front

AWBIA1209GB

Oxygen sensor thread cleaner

: (J-43897-18)

Oxygen sensor thread cleaner

: (J-43897-12)

Tool numbers

: KV10114400 (J-38365)
: KV991J0050 (J-44626)

EM-36

< REMOVAL AND INSTALLATION >

OIL PAN AND OIL STRAINER

OIL PAN AND OIL STRAINER

Exploded View

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Removal and Installation (Lower Oil Pan)

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REMOVAL

WARNING:

• You should not remove the oil pan until the exhaust system and cooling system have completely

cooled off.

1. Drain the engine oil. Refer to 

LU-9, "Changing Engine Oil"

.

2. Loosen the lower oil pan bolts in reverse order as shown. 

1.

O-ring

2.

Front cover gasket and rear oil 
seal retainer gasket

3.

Oil pressure switch 

4.

Oil cooler gasket

5.

Oil cooler

6.

Oil cooler connection

7.

Oil filter

8.

Lower oil pan

9.

Oil strainer

10. Rear plate cover

11. Crankshaft position sensor 

(POS)

12. O-ring

13. Upper oil pan

AWBIA1628ZZ

AWBIA1211GB

OIL PAN AND OIL STRAINER

EM-37

< REMOVAL AND INSTALLATION >

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3. Remove the lower oil pan.

• After removing the bolts, separate the mating surface and

remove the old liquid gasket using Tool.

CAUTION:

Do not damage the mating surfaces.

• In areas where the Tool is difficult to use, use a plastic hammer

to lightly tap (1) the Tool where the liquid gasket is applied.

Use a plastic hammer to slide (2) the Tool by tapping on the

side. 

4. Remove the old sealant from the bolt holes and threads.

INSPECTION AFTER REMOVAL

Clean debris from the oil strainer.

INSTALLATION

1. Apply a continuous bead of sealant to the lower oil pan.

• Use Genuine Silicone RTV Sealant, or equivalent. Refer to 

GI-

22, "Recommended Chemical Products and Sealants"

.

• Be sure the sealant is 4.5 - 5.5 mm (0.177 - 0.217 in) wide.

CAUTION:

• Installation should be done within 5 minutes after apply-

ing liquid gasket.

• Do not fill the engine with engine oil for at least 30 min-

utes after the components are installed to allow the seal-

ant to cure.

2. Install the lower oil pan. Tighten the lower oil pan bolts in order

as shown.

CAUTION:

• Installation should be done within 5 minutes after apply-

ing liquid gasket.

• Do not fill the engine with engine oil for at least 30 min-

utes after the components are installed to allow the seal-

ant to cure.

3. Refill the engine with engine oil. Refer to 

LU-9, "Changing

Engine Oil"

.

INSPECTION AFTER INSTALLATION

1. Inspect the engine oil level. Refer to 

LU-8, "Inspection"

.

2. Start the engine and check for leaks. Refer to 

LU-8, "Inspection"

.   Repair as necessary.

Removal and Installation (Upper Oil Pan)

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REMOVAL

WARNING:

• Do not remove the oil pan until the exhaust system and cooling system have completely cooled off.

• When removing the front and rear engine through bolts and nuts, lift the engine up slightly for safety. 

CAUTION:

When removing the upper oil pan from the engine, first remove the crankshaft position sensor (POS).

Be careful not to damage sensor edges or signal plate teeth.

NOTE:

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

ing.

Tool number

: KV10111100 (J-37228)

WBIA0566E

SEM159F

AWBIA1357ZZ

EM-38

< REMOVAL AND INSTALLATION >

OIL PAN AND OIL STRAINER

1. Remove the engine from the vehicle. Refer to 

EM-102, "2WD : Removal and Installation"

 (2WD models)

or 

EM-107, "4WD : Removal and Installation"

 (4WD models).

2. Remove the oil dipstick.
3. Remove the drive belt. Refer to 

EM-12, "Removal and Installation"

.

4. Disconnect the A/C compressor harness connector.
5. Remove the A/C compressor bolts and remove the A/C compressor. Refer to 

HA-30, "COMPRESSOR :

Removal and Installation"

.

6. Remove coolant pipe bolts.
7. Disconnect the coolant hoses from the engine oil cooler.
8. Remove the oil filter and engine oil cooler from the upper oil pan. Refer to 

LU-15, "Removal and Installa-

tion"

.

9. Remove the oil pressure switch, and the crankshaft position sensor (POS) from the upper oil pan.
10. Remove the lower oil pan. Refer to 

EM-36, "Removal and Installation (Lower Oil Pan)"

.

11. Remove the oil strainer.
12. Remove the upper oil pan.
a. Loosen the bolts in the reverse order shown using a power tool.

b. Insert an appropriate size tool into the notch (1) of the upper oil

pan as shown.

c.

Pry off the upper oil pan by moving the tool up and down (2) as

shown.

13. Remove the O-ring seals from the bottom of the cylinder block

and oil pump housing. Use new O-rings for installation.

CAUTION:

Do not reuse O-rings.

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