Nissan Altima L32. Instruction — part 666
EM-200
< ON-VEHICLE REPAIR >
[VQ35DE]
CYLINDER HEAD
5. Using a valve guide reamer, apply a reamer finish to the valve
guide.
VALVE SEAT CONTACT
• After confirming that the dimensions of valve guides and valves are
within specifications, perform this procedure.
• Apply prussian blue onto contacting surface of valve seat to check
the condition of the valve contact on the surface.
• Check if the contact area band is continuous all around the circum-
ference.
• If not, grind to adjust valve fitting and check again. If the contacting
surface still has N.G conditions even after the re-check, replace
valve seat.
VALVE SEAT REPLACEMENT
1. Bore out old seat until it collapses. Boring should not continue
beyond the bottom face of the seat recess in cylinder head. Set
the machine depth stop to ensure this.
2. Ream cylinder head recess for service valve seat.
Be sure to ream in circles concentric to the valve guide cen-
ter.
This will enable valve seat to fit correctly.
3. Heat cylinder head to 110
° to 130°C (230° to 266°F) by soaking in heated oil.
4. Press fit valve seat until it seats on the bottom.
5. Cut or grind valve seat using suitable tool to the specified dimensions. Refer to
.
6. After cutting, lap valve seat with abrasive compound.
7. Check valve seating condition.
Intake and exhaust
finished size
: 6.000 - 6.018 mm
(0.2362 - 0.2369 in)
SEM932C
SBIA0322E
Oversize
: 0.5 mm (0.020 in)
Intake
: 38.500 - 38.516 mm
(1.5157 - 1.5164 in)
Exhaust
: 32.100 - 32.116 mm
(1.2638 - 1.2644 in)
Seat face angle
α
: 45
° 15' - 45° 45' de-
grees/minutes
Contacting width (W) for intake
: 1.18 - 1.22 mm
(0.0465 - 0.0480 in)
Contacting width (W) for exhaust
: 1.38 - 1.42 mm
(0.0543 - 0.0559 in)
SEM795A
SEM892B
CYLINDER HEAD
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8. Use a depth gauge to measure the distance between the mount-
ing surface of the cylinder head spring seat and the valve stem
end. If the distance is shorter than specified, repeat step 5 to
adjust it. If it is longer, replace the valve seat with a new one.
VALVE SPRING SQUARENESS
Set try square along the side of valve spring and rotate the spring.
Measure the maximum clearance between the top face of spring and
try square.
VALVE SPRING DIMENSIONS AND VALVE SPRING PRESSURE LOAD
Check valve spring pressure at specified spring height.
If it is not within specifications, replace the spring.
Valve seat resurface limit (L)
intake
: 41.16 - 41.76 mm
(1.6205 - 1.6441 in)
Valve seat resurface limit (L)
exhaust
: 41.09 - 41.69 mm
(1.6177 - 1.6413 in)
SEM621F
Out-of-square limit
: Less than 2.0 mm (0.079 in)
PBIC0080E
Standard
: 166 - 188 N (16.9 - 19.2 kg, 37.3 - 42.3 lb) at
height 37.0 mm (1.457 in)
Limit
: 373 - 421 N (38.0 - 42.9 kg, 84 - 95 lb) at
height 27.2 mm (1.071 in)
SEM113
EM-202
< REMOVAL AND INSTALLATION >
[VQ35DE]
ENGINE ASSEMBLY
REMOVAL AND INSTALLATION
ENGINE ASSEMBLY
Removal and Installation
INFOID:0000000004202181
WARNING:
• Place chocks at front and back of rear wheels.
• For engines not equipped with engine slingers, attach proper slingers and bolts as described in the
NISSAN Parts Catalog.
CAUTION:
• Do not start working until exhaust system and coolant are cool.
• If items or work required are not covered by the engine main body section, follow the applicable pro-
cedures.
AWBIA0389GB
1.
Torque rod
2.
RH engine mounting insulator
3.
RH engine mount support
4.
Front engine mounting bracket
5.
Front engine mounting insulator 6.
RH engine mount bracket
7.
Lower torque rod bracket
8.
Lower torque rod
9.
Rear engine mounting insulator
10. Rear engine mounting bracket
11.
Rear lower insulator
ENGINE ASSEMBLY
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• Use the correct supporting points for lifting and jacking. Refer to
GI-33, "Garage Jack and Safety
.
• In removing the drive shafts, be careful not to damage any transaxle grease seals.
• Before separating the engine and transaxle, remove the crankshaft position sensor (POS).
• Do not damage the edge of the crankshaft position sensor (POS) or the ring gear teeth.
REMOVAL
1. Release fuel pressure. Refer to
.
2. Drain coolant. Refer to
CO-35, "Changing Engine Coolant"
.
3. Drain power steering fluid. Refer to
.
4. Drain transaxle fluid. Refer to
(M/T),
(CVT).
5. Drain clutch fluid (M/T). Refer to
CL-7, "Air Bleeding Procedure"
.
6. Remove hood assembly. Refer to
DLK-208, "HOOD ASSEMBLY : Removal and Installation"
7. Remove the engine cover, and the engine under cover using power tool.
8. Remove air intake duct and air cleaner case assembly with mass air flow sensor. Refer to
9. Remove battery and tray. Refer to
PG-68, "Removal and Installation"
(Coupe models) or
(Sedan models).
10. Remove CVT control unit if equipped.
11. Remove cowl top. Refer to
EXT-18, "Removal and Installation"
.
12. Remove strut bar using power tools. Refer to
.
13. Remove IPDM E/R.
14. Remove the following parts:
• Evap vacuum hose
• Brake booster vacuum hose
• Heater hoses (engine side)
15. Disconnect the clutch operating cylinder fluid line (M/T only). Refer to
16. Disconnect transaxle shift control cables.
17. Remove upper and lower radiator hoses.
18. Remove power steering reservoir.
19. Disconnect fuel hose quick connection at vehicle piping side. Refer to
EM-146, "Removal and Installa-
20. Remove engine mount stay.
21. Remove RH upper engine mount insulator.
22. Remove LH insulator nut.
23. Remove the front drive shafts. Refer to
FAX-11, "Removal and Installation (Left Side)"
"Removal and Installation (Right Side)"
24. Remove the front exhaust tube using power tools. Refer to
.
25. Remove the cooling fan assembly. Refer to
CO-40, "Removal and Installation"
.
26. Discharge and recover the R134a refrigerant. Refer to
HA-24, "HFC-134a (R-134a) Service Procedure"
.
27. Remove the A/C compressor using power tools. Refer to
HA-36, "Removal and Installation for Compres-
.
28. Install engine slingers into front of LH cylinder head and rear of
RH cylinder head.
• (A): RH cylinder head
ALBIA0262GB
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