crank NISSAN TEANA 2014 Service Manual

EM-70
< REMOVAL AND INSTALLATION >[QR25DE]
OIL SEAL
OIL SEAL
Removal and Installation
of Valve Oil SealINFOID:0000000009460500
REMOVAL
1. Remove camshaft. Refer to EM-47, "Removal and Installation".
2. Remove valve lifter. Refer to EM-47, "Removal and Installation"
.
3. Rotate crankshaft, and set piston whose oil seal is to removed to top dead center. This prevents valve from dropping inside cylinder.
CAUTION:
When rotating crankshaft, be careful to avoid scarring the front cover with the timing chain.
4. Remove valve collet. • Compress valve spring using Tools. Remove valve collet with
magnet hand.
CAUTION:
• Be careful not to damage valve lifter holes.
• Install Tool (A) in the center of valve spring retainer to
press it.
5. Remove valve spring retainer and valve spring (with valve spring seat). CAUTION:
Do not remove valve spring seat from valve spring.
6. Remove valve oil seal using Tool (A).
INSTALLATION
1. Apply new engine oil to new valve oil seal joint surface and seal lip. Tool number (A) : KV10116200 (J-26336-A)
Tool number (B) : KV10109220 ( — )
Tool number (C) : KV10115900 (J-26336-20)
JPBIA1365ZZ
Tool number : KV10115900 (J-26336-20)
1 : Valve spring retainer
JPBIA4477ZZ
Tool number : KV10107902 (J-38959)
ALBIA0863GB
Revision: November 20132014 Altima NAM

OIL SEALEM-71
< REMOVAL AND INSTALLATION > [QR25DE]
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2. Press in valve oil seal to the position shown using Tool (A).
3. Installation of the remaining components is in the reverse order of removal.
Removal and Installati on of Front Oil SealINFOID:0000000009460501
REMOVAL
1. Remove the RH front wheel. Refer to WT-55, "Adjustment".
2. Remove the fender protector side cover (RH). Refer to EXT-26, "FENDER PROTECTOR : Removal and
Installation".
3. Remove the drive belt. Refer to EM-19, "Removal and Installation"
.
4. Remove the rear cover plate.
5. Remove crankshaft pulley (1) using the following procedure:
a. Hold the crankshaft pulley (1) using suitable tool (A), then loosen and remove the crankshaft pulley bolt.
b. Attach suitable tool (A) in the M 6 (0.24 in diameter) thread hole
on crankshaft pulley (1), and remove crankshaft pulley.
6. Remove front oil seal from front cover. CAUTION:
Be careful not to damage the front cover.
INSTALLATION
1. Apply new engine oil to new front oil seal lip and install it using a suitable tool.
• Install new oil seal in the direction shown.Oil seal installed height
(H) : 12.1 mm (0.476 in)
Tool number : KV10115600 (J-38958)
ALBIA0864GB
ALBIA0857GB
ALBIA0858GB
(A) : Dust seal lip
(B) : Oil seal lip
: Engine outside
: Engine inside
PBIC3485J
Revision: November 20132014 Altima NAM

EM-72
< REMOVAL AND INSTALLATION >[QR25DE]
OIL SEAL
• Press-fit front oil seal until it is flush with front end surface of
front cover using a suitable drift (A) with outer diameter 56 mm
(2.20 in) and inner diameter 48 mm (1.89 in).
CAUTION:
• Do not reuse oil seal.
• Be careful not to damage front cover or crankshaft.
• Press-fit oil seal straight to avoid causing burrs or tilt-
ing.
• Never touch the grease applied to the oil seal lip.
2. Installation of the remaining components is in the reverse order of removal.
Removal and Installation of Rear Oil SealINFOID:0000000009460502
REMOVAL
1. Remove the engine and transaxle. Refer to EM-84, "Removal and Installation".
2. Separate engine from transaxle.
3. Remove drive plate.
4. Remove rear oil seal using suitable tool. CAUTION:
Be careful not to scratch rear oil seal retainer.
INSTALLATION
1. Apply new engine oil to new rear oil seal and install it using a suitable tool. • Install new oil seal in the direction shown.
ALBIA0865GB
WBIA0204E
(A) : Dust seal lip
(B) : Oil seal lip
: Drive plate side
: Engine front
PBIC3485J
Revision: November 20132014 Altima NAM

EM-76
< REMOVAL AND INSTALLATION >[QR25DE]
CYLINDER HEAD
Disassembly and Assembly
INFOID:0000000009460505
CAUTION:
• When installing camshafts, chain tensioners, oil seals or other sliding parts, lubricate contacting
surfaces with new engine oil.
• Apply new engine oil to threads and seat surf aces when installing the cylinder head, camshaft
sprocket, crankshaft pulley and camshaft bracket.
• Attach tags to valve lifters so all parts are assembled in their original position.
CAUTION:
Read PRECAUTION carefully.
The exhaust valve contains metallic sodium. Therefore, extreme caution must be taken when handling
and disposing of the exhaust valve. Refer to EM-5, "Special Cautions to Ensure the Safe Disposal of
Sodium-filled Exhaust Valves".
DISASSEMBLY
1. Remove the valve lifter.
NOTE:
Confirm installation point to return valve lifter to original location during assembly.
2. Remove valve collet.
1. Valve collet 2. Valve spring retainer 3. Valve spring
4. Valve oil seal 5. Valve guide 6. Cylinder head
7. Valve seat (INT) 8. Valve (INT) 9. Valve (EXH)
10. Valve seat (EXH) 11. Spark plug tube L. Apply thread locking sealant
JPBIA0681GB
Revision: November 20132014 Altima NAM

CYLINDER BLOCKEM-87
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UNIT DISASSEMBLY AND ASSEMBLY
CYLINDER BLOCK
Exploded ViewINFOID:0000000009460509
AWBIA1327GB
1. Cylinder block 2. O-ring 3. Crankshaft position sensor (POS)
4. Knock sensor 5. Water temperature sensor 6. Cylinder block heater (if equipped)
7. Lower cylinder block 8. Lower cylinder block bolt 9. Snap ring
10. Connecting rod 11. Connecting rod bearing 12. Connecting rod bearing cap
13. Connecting rod bearing cap bolt 14. Piston 15. Oil ring
16. Second ring 17. Top ring 18. Piston pin
19. Main thrust bearing 20. Main bearing upper 21. Crankshaft
22. Main bearing lower 23. Crankshaft rear oil seal 24. Pilot converter
25. Crankshaft signal plate 26. Drive plate 27. Reinforcement plate
Revision: November 20132014 Altima NAM

EM-88
< UNIT DISASSEMBLY AND ASSEMBLY >[QR25DE]
CYLINDER BLOCK
Disassembly and Assembly
INFOID:0000000009460510
CAUTION:
Apply new engine oil to parts marked in illustration before installation.
NOTE:
The following procedures explain how to disassem ble the engine with the engine stand fastened to the bell
housing. Some steps may be different if using a different type of engine stand.
DISASSEMBLY
1. Remove the engine and transaxle as an assembly from the vehicle, and separate the transaxle from the
engine. Refer to EM-84, "Removal and Installation"
.
2. Remove the drive plate. Hold the crankshaft using Tool (A) and use a suitable tool to remove the bolts.
3. Remove pilot converter using Tool.
4. Remove the rear oil seal. Refer to EM-72, "Removal and Installation of Rear Oil Seal"
.
5. Mount the engine on a suitable engine stand (A). CAUTION:
• Use an engine stand that has a load capacity large
enough for supporting the engine weight [approximately
135 kg (298 lb) or more].
• Before removing the hanging chains, check the engine
stand is stable and there is no risk of overturning.
NOTE:
The figure shows an example of widely used engine stand (A)
that can support mating surface of transaxle with drive plate
removed.
• Remove the following parts if the engine stand load capacity is not adequate, to reduce the potential risk of overturning stand:
- Intake manifold. Refer to EM-30, "Removal and Installation"
.
- Exhaust manifold. Refer to EM-33, "Removal and Installation"
.
- Rocker cover. Refer to EM-45, "Removal and Installation"
.
6. Drain any remaining engine oil and coolant from the engine.
7. Remove the exhaust manifold and three way catalyst assembly. Refer to EM-33, "Removal and Installa-
tion".
8. Remove the intake manifold and fuel tube assembly. Refer to EM-30, "Removal and Installation"
.
28. Oil level gauge guide 29. Oil level gauge 30. O-ring
A. Follow assembly procedure
Tool Number : KV11105210 (J-44716)
PBIC3226J
Tool Number : ST16610001 (J-23907)
WBIA0483E
PBIC3227J
Revision: November 20132014 Altima NAM

CYLINDER BLOCKEM-89
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9. Remove the ignition coils. Refer to
EM-40, "Removal and Installation".
10. Remove the rocker cover. Refer to EM-45, "Removal and Installation"
.
11. Remove the front cover, timing chain, and balancer unit. Refer to EM-62, "Removal and Installation"
.
12. Remove the cylinder head. Refer to EM-74, "Removal and Installation"
.
13. Remove oil cooler. Refer to LU-16, "Exploded View"
.
14. Remove the knock sensor. CAUTION:
Carefully handle the sensor and do not drop the sensor.
15. Remove crankshaft position sensor (POS) (2) and O-ring (1).
CAUTION:
• Avoid impacts such as a dropping.
• Do not disassemble.
• Keep it away from metal particles.
• Do not place sensor close to magnetic materials.
• Do not reuse O-ring.
16. Remove the piston and connecting rod assemblies.
a. Position the crankshaft and corresponding connecting rod, to be removed, to the bottom dead center stroke.
b. Remove the connecting rod cap. Number the cap so it can be assembled in the same position.
c. Using a hammer handle or similar tool, push the piston and con- necting rod assembly out of the top of the cylinder block. Num-
ber the piston and rod so it can be assembled in the same
position.
• Before removing the piston and connecting rod assembly,
check the connecting rod side clearance. Refer to EM-96,
"Inspection After Disassembly".
17. Remove the connecting rod bearings. If reusing, num ber them so they can be assembled in the same
position and direction.
CAUTION:
• When removing them, note the installation position. Keep them in the correct order.
18. Remove the piston rings from the piston. • Use a piston ring expander.
• Before removing the piston rings, check the piston ring side
clearance. Refer to EM-96, "Inspection After Disassembly"
.
CAUTION:
• When removing the piston rings, be careful not to damage
the piston.
• Be careful not to damage piston rings by expanding them excessively, if reusing them.
: Engine front
AWBIA1332GB
PBIC0259E
PBIC0087E
Revision: November 20132014 Altima NAM

EM-90
< UNIT DISASSEMBLY AND ASSEMBLY >[QR25DE]
CYLINDER BLOCK
19. Remove the piston from the connecting rod as follows.
a. Using a snap ring pliers, remove the two snap rings.
b. Heat the piston to 60 ° - 70 °C (140 ° - 158 °F) with a heat gun, or
equivalent.
c. Push out piston pin with a punch of an outer diameter of approx- imately 19 mm (0.75 in).
20. Remove the lower cylinder block bolts. • Before loosening the lower cylinder block bolts, measure thecrankshaft side clearance. Refer to EM-96, "Inspection After
Disassembly".
• Loosen the lower cylinder block bolts in the reverse order shown.
21. Remove the lower cylinder block. • Cut the Silicone RTV Sealant and remove the lower cy linder block from the cylinder block, using Tool.
CAUTION:
Be careful not to damage the mating surface.
PBIC0260E
PBIC0261E
PBIC0262E
KBIA0063E
Tool number : KV10111100 (J-37228)
Revision: November 20132014 Altima NAM

CYLINDER BLOCKEM-91
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22. Remove the crankshaft (A).
CAUTION:
• Do not damage or deform the signal plate (B) while
mounted on the crankshaft.
• When setting the crankshaft on a flat surface, use a block of wood to avoid interferen ce between the signal plate
and the surface.
• Do not remove signal plate unless it is necessary.
23. Pull the rear oil seal off of the rear end of the crankshaft. CAUTION:
Do not damage the crankshaft or cylinder block when removing the rear oil seal.
NOTE:
When replacing the rear oil seal without removing the cy linder block, use a suitable tool to pull it out from
between crankshaft and block.
24. Remove the main bearings and thrust bearings from the cylinder block and lower cylinder block. CAUTION:
Identify and number the bearings, if reusing th em, so that they are assembled in the same position
and direction.
25. Remove oil jets (A) if necessary.
ASSEMBLY
1. Using compressed air, clean out the coolant and oil passages in the cylinder block, the cylinder bore and
the crankcase to remove any foreign material.
WARNING:
Use approved safety glasses to protect your eyes.
2. Install the drain plugs on the cylinder block. • Apply Silicone RTV Sealant. Use Genuine Silicone RTV Seal ant, or equivalent. Refer to
GI-21, "Recommended Chemi cal Products and Sealants"
.
• : Engine front CAUTION:
Do not reuse copper sealing washers.
AWBIA1377ZZ
: Engine front
JPBIA0686ZZ
Drain plug torque
Drain plug (A) : 54 Nm (5.5 kg-m, 40 ft-lb)
Drain plug (B) : 9.8 Nm (1.0 kg-m, 87 in-lb)
AWBIA1328GB
Revision: November 20132014 Altima NAM

EM-92
< UNIT DISASSEMBLY AND ASSEMBLY >[QR25DE]
CYLINDER BLOCK
3. Install oil jets (A).
4. Install the main bearings and the thrust bearings.
a. Remove dust, dirt, and oil from the bearing mating surfaces of the cylinder block and lower cylinder block.
b. Install the thrust bearings (1) to both sides of the No. 3 main bearing journal (F) on the cylinder block.
• Install the thrust bearings with the oil groove (G) facing the
crankshaft arm (outside).
c. Install the main bearings paying attention to their position and direction.
• The main bearing with an oil hole and groove goes on the cyl- inder block side (A). The one without them goes on the lower
cylinder block side (B).
• Only the main bearing (on the cylinder block side) for No. 3 journal (6) has different specifications.
• Before installing the bearings, apply engine oil to the bearing
friction surface (inside). Do not apply oil to the back surface,
but thoroughly clean it.
• When installing, align the bearing stopper (1), (5) to the notch.
• Make sure that the oil holes on the cylinder block and those on the corresponding bearing (2), (4) are aligned.
5. Install the signal plate to the crankshaft.
a. Position the crankshaft and signal plate using a positioning dowel pin, and tighten the bolts to specification.
b. Remove the dowel pin. CAUTION:
Be sure to remove dowel pin before installing the crank-
shaft.
NOTE:
Dowel pins for the crankshaft and signal plate are supplied as a
set for each.
6. Install the crankshaft onto the cylinder block. • While turning the crankshaft by hand, check that it turnssmoothly.
: Engine front
JPBIA0686ZZ
(A) : No. 1
(B) : No. 2
(C) : No. 3
(D) : No. 4
(E) : No. 5
: Engine front
AWBIA1329GB
(3) : Bearing other than No. 3
(7) : Thrust bearings
AWBIA0186ZZ
ALBIA0208ZZ
Revision: November 20132014 Altima NAM