2014 NISSAN TEANA lock

EM-66
< REMOVAL AND INSTALLATION >[QR25DE]
TIMING CHAIN
• Measure outer diameters (d1, d2)
at the two positions as shown.
• Measure d2 within the range (A).
• If the value difference (d1 - d2) exceeds the limit, replace the bal-
ancer unit bolt with a new one.
INSTALLATION
1. Make sure the crankshaft key points straight up.
2. Install the balancer unit and tighten the bolts in the numerical order as shown:
CAUTION:
• When reusing a bolt, check its outer diameter before installation. Follow the Balan cer Unit Bolt Outer Diameter
procedure.
• Apply new engine oil to threads and seating surfaces of bolts.
• Check tightening angle with an angle wrench (A) or a pro- tractor. Do not make judgme nt by visual check alone.
3. Install the crankshaft sprocket (1) and timing chain (2) for the balancer unit.
• Make sure that the crankshaft sprocket (1) is positioned with
mating marks (A) on the block and sprocket meeting at the
top.
• Install it by lining up mating marks on each sprocket (A), (C) and timing chain (B), (D).
• (B): Pink link
• (D): Yellow link Limit : 0.15 mm (0. 0059 in) or more
KBIA0126E
: Engine front
AWBIA1324GB
Tool number : KV10112100 (BT-8653-A)
Step 1 Bolts 1-5 : 42 N·m (4.3 kg-m, 31 ft-lb)
Bolt 6 : 36 N·m (3.7 kg-m, 27 ft-lb)
Step 2 Bolts 1-5 : 120
° + 5 °
Bolt 6 : 90 ° + 5 °
Step 3 Loosen in reverse order : 0 N·m (0 kg-m, 0 ft-lb)
Step 4 Bolts 1-5 : 42 N·m (4.3 kg-m, 31 ft-lb)
Bolt 6 : 36 N·m (3.7 kg-m, 27 ft-lb)
Step 5 Bolts 1-5 : 120
° + 5 °
Bolt 6 : 90 ° + 5 °
ALBIA0201ZZ
ALBIA0860GB
Revision: November 20132014 Altima NAM

EM-68
< REMOVAL AND INSTALLATION >[QR25DE]
TIMING CHAIN
8. Install new front oil seal to front cover. Refer to
EM-71, "Removal and Installation of Front Oil Seal".
9. Install front cover with the following procedure:
a. Install O-rings to cylinder head and cylinder block. CAUTION:
Do not reuse O-rings.
b. Apply a continuous bead of liquid gasket to front cover as shown.
Use Genuine RTV Silicone Seal ant or equivalent. Refer to
GI-21, "Recommended Chemi cal Products and Sealants"
.
CAUTION:
• For bolt holes with marks (5 locations), apply liquid
gasket outside the holes.
• Installation should be done within 5 minutes after applica-
tion of liquid gasket.
• Do not fill the engine with oil for at least 30 minutes after
the components are installed to allow the liquid gasket to
cure.
c. Make sure the mating marks on the timing chain and each sprocket are still aligned. Then install the front cover.
CAUTION:
Do not damage the front oi l seal during installation.
(2) : Camshaft sprocket (INT)
(4) : Timing chain slack guide
(5) : Crankshaft key
(6) : Crankshaft sprocket
(7) : Balancer unit sprocket
(8) : Balancer unit chain tensioner
(9) : Balancer unit timing chain
(10) : Timing chain tension guide
(11) : Camshaft sprocket (EXH)
(A) : Mating mark (Outer groove)
(B) : Pink link
(C) : Mating mark (lug)
(D) : Mating mark (stamp)
(E) : Yellow link
(F) : Pink link
(G) : Mating mark (stamp)
(H) : Mating mark (stamp)
(J) : Yellow link
(K) : Mating mark (Outer groove)
(L) : Pink link
(a) : 35.7 mm (1.406 in)
(b) : 6.0 – 6.5 mm (0.236 – 0.256 in)
(c) : 3.4 – 4.4 mm (0.134 – 0.173 in)
(d) : 179.6 mm (7.07 in)
(e) : 35.5 mm (1.398 in)
(f) : 31.3 mm (1.232 in)
(G) : Dowel pin hole
ALBIA0943ZZ
Revision: November 20132014 Altima NAM

OIL SEALEM-73
< REMOVAL AND INSTALLATION > [QR25DE]
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• Press fit new oil seal straight using a suitable tool (A) to avoid
tilting the seal or causing burrs.
• Press in the new rear oil seal (1) to the position (b) shown.
2. Installation of the remaining components is in the reverse order of removal.
ALBIA0866GB
(b) : 0 - 0.5 mm (0 - 0.020 in)
(A) : Rear surface of cylinder block
JPBIA3011ZZ
Revision: November 20132014 Altima NAM

CYLINDER HEADEM-75
< REMOVAL AND INSTALLATION > [QR25DE]
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• Replace the cylinder heads bolts with new ones if the size differ-
ence between d1 and d2 exceeds the limit.
• If reduction of outer diameter appears in a position other than d2, use it as d2 point.
INSTALLATION
1. Clean surfaces of cylinder head and cylinder block.
2. Install a new cylinder head gasket. CAUTION:
Do not reuse cylinder head gasket.
3. Install the cylinder head.
4. Follow the steps below to tighten the cylinder head bolts in the numerical order as shown. • Clean threads and seating surfaces of bolts.
• Apply new engine oil to the threads and the seating surfaces of bolts.
CAUTION:
• If cylinder head bolts are re-used, check their ou ter diameters before installation. Follow the
Outer Diameter of Cylinder H ead Bolts measurement procedure.
• Check and confirm the tighte ning angle by using angle
wrench or protractor. Do not judge angle by visual inspec-
tion.
5. Installation of the remaining components is in the reverse order of removal. Limit (d1 - d2) : 0.23 mm (0.0091 in) or more
KBIA0189E
Tool number (A) : KV10112100 (BT-8653-A)
PBIC3208J
Step a : 50 N·m (5.1 kg-m, 37 ft-lb) in order
Step b : 60 ° clockwise in order
Step b : Loosen to 0 N·m in order
Step c : 39.2 N·m (4.0 kg-m, 29 ft-lb) in order
Step d : 75 ° clockwise in order
Step e : 75 ° clockwise in order
: Engine frontAWBIA1325GB
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
< UNIT DISASSEMBLY AND ASSEMBLY > [QR25DE]
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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
< UNIT DISASSEMBLY AND ASSEMBLY > [QR25DE]
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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