2014 NISSAN TEANA SEC

CAMSHAFTEM-57
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WARNING:
Check when engine is cold so as to preven t burns from any splashing engine oil.
CAUTION:
Perform this inspection only when DTC P0011, P0014, P052A, P052B is detected in self-diagnostic
results of CONSULT and it is directed according to inspection procedure of EC section. Refer to EC-
210, "Diagnosis Procedure".
1. Check engine oil level and adjust oil level as necessary. Refer to LU-9, "Inspection"
.
2. Remove the intake valve timing intermediate lock control solenoid valve, intake valve timing control sole- noid valve, and exhaust valve timing control solenoid valve. Refer to EM-58, "Intake Valve Timing Interme-
diate Lock Control Solenoid Valve, Intake Valve Timing Control Solenoid Valve, and Exhaust Valve Timing
Control Solenoid Valve".
3. Perform the following procedure to prevent the engi ne from being unintentionally started while checking.
a. Release fuel pressure. Refer to EC-182, "Work Procedure"
.
b. Disconnect injector harness connectors.
4. Crank engine, and then make sure that engine oil comes out of the valve timing control cover oil holes (A). End cranking after
checking.
WARNING:
Be careful not to touch rotating parts (drive belt, crankshaft
pulley, etc.).
CAUTION:
• Engine oil may squirt from intake valve timing intermedi-
ate lock control solenoid valve, intake valve timing control
solenoid valve, exhaust valve timing control solenoid
valve installation holes during cranking. Use a shop cloth
to prevent engine oil from splashing on worker, engine
components and vehicle.
• Do not allow engine oil to get on rubber componen ts such as drive belts or engine mount insula-
tors. Immediately wipe off any splashed engine oil.
5. If engine oil does not come out from valve timing cont rol cover oil holes (A), diagnose problem in lubrica-
tion circuit such as dirty oil groove between oil strainer and intake valve timing intermediate lock control
solenoid valve, intake valve timing control solenoid valve, or exhaust valve timing control solenoid valve.
Refer to LU-7, "Lubrication Circuit"
.
a. Remove components between intake valve timing intermediate lock control solenoid valve, intake valve timing control solenoid valve, exhaust valve timing c ontrol solenoid valve and camshaft sprocket (INT) or
camshaft sprocket (EXH), (if necessary) and then check each oil groove for clogging.
b. Clean oil groove if necessary. Refer to LU-7, "Lubrication Circuit"
.
6. After inspection, install the remaining components in the reverse order of removal.
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Revision: November 20132014 Altima NAM

EM-64
< REMOVAL AND INSTALLATION >[QR25DE]
TIMING CHAIN
• Plunger stopper tab can be pushed up to release (coaxial
structure with lever).
b. Insert the stopper pin into the tensioner body hole to hold the lever and keep tab released.
NOTE:
Allen wrench [2.5 mm (0.098)] is used for a stopper pin as an
example.
c. Insert plunger into tensioner body by pressing slack guide.
d. Keep slack the guide pressed and hold it by pushing the stopper pin through the lever hole and body hole.
e. Remove the bolts and remove the timing chain tensioner (pri- mary).
f. Remove the timing chain. CAUTION:
Do not rotate the crankshaft or camshafts while the timing chain is removed. It can cause damage
to the valve and piston.
13. Remove the camshaft sprockets using the following procedure:
a. Secure hexagonal part of the camshaft with a wrench and loosen the camshaft sprocket bolt.
b. Remove the camshaft sprocket bolt and camshaft sprockets for both camshafts.
14. Remove the chain slack guide, tension guide, and oil pump drive spacer.
PBIC2107E
PBIC2108E
ALBIA0844GB
Revision: November 20132014 Altima NAM

TIMING CHAINEM-65
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15. Press stopper tab (A) in the direction shown to push the timing
chain slack guide (B) toward timing chain tensioner (1) for the
balancer unit.
• The slack guide (B) is released by pressing the stopper tab
(A). As a result, the slack guide (B) can be moved.
16. Insert stopper pin (D) into tensioner body hole (C) to secure tim- ing chain slack guide (B).
NOTE:
Use a hard metal pin with a diameter of approximately 1.2 mm
(0.047 in) as a stopper pin.
17. Remove timing chain tensioner (1) for balancer unit.
18. Secure width across flats of the balancer unit LH side shaft using a suitable tool. Loosen the balancer unit sprocket bolt.
19. Remove balancer unit timing chain, balancer unit sprocket and crankshaft sprocket.
20. Loosen bolts in the reverse order shown, and remove balancer unit.
CAUTION:
• Do not disassemble balancer unit.
INSPECTION AFTER REMOVAL
Timing Chain
Check the timing chain for cracks or excessive wear. If a defect is
found, replace the timing chain.
Balancer Unit Bo lt Outer Diameter
PBIC5314E
: Engine front
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PBIC0282E
Revision: November 20132014 Altima NAM

TIMING CHAINEM-69
< REMOVAL AND INSTALLATION > [QR25DE]
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d. Tighten front cover bolts in the numerical order shown.
e. After all bolts are tightened, retighten them to the specified torque.
CAUTION:
Wipe off excess sealant leaking at the surface for installing
the oil pan.
10. Install the chain guide between the camshaft sprockets.
11. Install valve timing control cover. Refer to EM-59, "Valve Timing Control Cover"
.
12. Insert crankshaft pulley by aligning with crankshaft key. • Tap its center with a plastic hammer to insert.
• Do not tap the crankshaft pulley outer diameter.
13. Tighten crankshaft pulley bolt. • Secure crankshaft pulley with tool to tighten the bolt.
• Perform angle tightening with the following procedure:
a. Apply new engine oil to threads and seat surfaces of bolts.
b. Tighten to initial specifications:
c. Apply a paint mark (A) on the front cover, mating with any one of six easy to recognize stamp marks on bolt flange (B).
d. Turn crankshaft pulley bolt an additional 60 degrees +6/-0 degrees.
NOTE:
Check that the assembled unit does not interfere with adjacent
components by turning the crankshaft in the tightening direction.
14. Installation of the remaining components is in the reverse order of removal.Front cover bolts
Bolts 6, 10, 12 : 49 N·m (5.0 kg-m, 36 ft-lb)
Bolts (all remaining) : 12.7 N·m (1.3 kg-m, 9 ft-lb)
(A) : Dowel pin
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Crankshaft bolt (1) : 42.1 N·m (4.3 kg-m, 31 ft-lb)
ALBIA0862GB
Revision: November 20132014 Altima NAM

EM-84
< UNIT REMOVAL AND INSTALLATION >[QR25DE]
ENGINE ASSEMBLY
Removal and Installation
INFOID:0000000009460508
WARNING:
• Place chocks at the front and back of the rear wheels.
• For engines not equipped with slin gers, attach proper slingers and bolts as described in the Parts
Catalog.
CAUTION:
• Do not start working until the exh aust system and coolant are cool.
• If items or work required are not covered by the en gine main body section, follow the applicable pro-
cedures.
• Use the correct supporting points for lifting and jacking. Refer to GI-33, "Garage Jack and Safety
Stand".
• In removing the drive shaft, be careful not to damage the grease seals on the transaxle.
NOTE:
When removing components such as hoses, tubes/lines, etc. , cap or plug openings to prevent fluid from spill-
ing.
REMOVAL
1. Remove engine cover using power tool. Refer to EM-28, "Removal and Installation".
2. Release fuel pressure. Refer to EC-182, "Work Procedure"
.
3. Disconnect the negative and positive battery terminal. Refer to PG-73, "Removal and Installation (Bat-
tery)".
4. Disconnect the fuel rail at the fuel hose quick connector (engine side). Refer to EM-41, "Removal and
Installation".
5. Drain the engine coolant. Refer to CO-12, "Changing Engine Coolant"
.
6. Remove the engine under cover. Refer to EXT-28, "Removal and Installation"
.
7. Remove hood assembly. Refer to DLK-170, "HOOD ASSEMBLY : Removal and Installation"
.
8. Remove core support cover.
9. Remove the front air duct and air cleaner case assembly. Refer to EM-29, "Removal and Installation"
.
10. Remove battery and battery tray. Refer to PG-74, "Removal and Installation (Battery Tray)"
.
11. Remove cowl top. Refer to EXT-24, "Removal and Installation"
.
12. Remove strut brace. Refer to FSU-19, "Exploded View"
.
13. Disconnect EVAP hose and vacuum hose from intake manifold.
14. Remove upper and lower radiator hoses (engine side).
15. Remove CVT cooler lines.
16. Disconnect engine room harness connecto r at the CVT and ECM connectors.
CAUTION:
Protect the harness connector with plastic bags or suitable covering to help prevent damage and
intrusion of foreign mate rials into the connectors.
17. Remove the brake booster vacuum hose.
18. Disconnect the heater hoses.
19. Remove the front wheels and tires using a power tool. Refer to WT-55, "Adjustment"
.
20. Remove the fender protector side covers (RH) and (LH). Refer to EXT-26, "FENDER PROTECTOR :
Removal and Installation".
21. Remove tie rod ends from the steering knuckles. Refer to ST-36, "Removal and Installation"
.
22. Remove the power steering gear bolts and support the power steering gear. Refer to ST-36, "Exploded
View".
23. Remove rear cover plate.
24. Remove the torque converter nuts.
25. Remove the rear engine mount torque rod.
26. Remove front exhaust tube and gaskets. Refer to EX-5, "Exploded View"
.
G. 90 N·m (9.2 kg-m, 66 ft-lb) H. 103 N·m (11 kg-m, 76 ft-lb) J. Follow installation procedure
Front
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-94
< UNIT DISASSEMBLY AND ASSEMBLY >[QR25DE]
CYLINDER BLOCK
• 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.
10. Install the piston to the connecting rod. Assemb le the components in their original positions.
a. Using a snap ring pliers, install the snap ring to the grooves of the piston's rear side.
• Insert the piston pin snap ring fully into groove.
CAUTION:
Do not reuse snap rings.
b. Install the piston to the connecting rod. • Using a heat gun, heat the piston [approximately 60 ° - 70 C ° (140 ° - 158 °F)] until the piston pin can be
pushed in by hand without excessive force. From the front to the rear, insert the piston pin into the piston
and the connecting rod.
• Assemble so that the front mark on the piston crown (A) and the oil holes (B) and the cylinder No. (C) on the connecting rod
are positioned as shown.
c. Install the piston pin snap ring (1 ) into the front of the piston.
• Check that the connecting rod moves smoothly.
11. Using a piston ring expander, install the piston rings. Assemble the components in their original positions.
CAUTION:
Be careful not to damage the piston.
• Position each ring with the gap as shown, referencing the pis-
ton front mark as the starting point.
NOTE:
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(b) : 0 - 0.5 mm (0 - 0.020 in)
(A) : Rear surface of cylinder block
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(A) : Top ring mating
(B) : Front mark
(C) : Second ring mating, oil ring, spacer mating
(D) : Oil ring upper or lower rail gap
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CYLINDER BLOCKEM-95
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The gap of the upper rail on the oil ring shall face
the direction opposite to that of the lower rail.
• Install the top ring and the second ring with the stamped surface (E) facing upward.
12. Install the connecting rod bearings to the connecting rod and the connecting rod cap. Assemble the components in their original
positions.
• When installing the connecting rod bearings, apply engine oil
to the bearing friction surface (inside). Do not apply oil to the
back surface, but thoroughly clean the back.
• When installing, align the connecting rod bearing stopper pro- trusion (A) with the notch (B) of the connecting rod to install.
• Check the oil holes on the connecting rod and those on the corresponding bearing are aligned.
13. Install the piston and connecting rod assembly using Tool. Assemble the components in their original positions.
• Rotate the crankshaft so the pin corresponding to the connect- ing rod to be installed is at the bottom dead center position.
• Apply engine oil sufficiently to the cylinder bore, piston, and crankshaft pin.
• Match the cylinder position number with the cylinder No. on
the connecting rod for installation.
• Install the piston with the front mark on the piston crown facing the front of the engine using Tool.
CAUTION:
Be careful not to damage the crankshaft pin, resu lting from an interference of the connecting rod
big end.
14. Install the connecting rod caps. Assemble the components in their original positions.
• Match the stamped cylinder number marks (F) on the connect- ing rod with those on the cap to install.
15. Tighten the connecting rod bolts using Tool (A) as follows:
Apply engine oil to the threads and seats of the connecting rod
bolts.
CAUTION:
Check tightening angle. Do not judge angle by visual
inspection. Stamped mark : 2K (second ring)
AWBIA1376ZZ
Tool number : EM03470000 (J-8037)
(A) : Oil splash
(B) : Small end diameter grade
(C) : Reference code
(D) : Bearing stopper groove
(E) : Reference code
(G) : Big end diameter grade
WBIA0485E
AWBIA1279GB
Step 1 : 29.4 N·m (3.0 kg-m, 22 ft-lb)
Step 2 : 0 N·m
Step 3 : 19.6 N·m (2.0 kg-m, 14 lb-ft)
Step 4 : Rotate bolts 90 ° + 0.5 °
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Revision: November 20132014 Altima NAM