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Nissan Altima L32. Manual - 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

EM-229, "Camshaft"

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

: 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

EM-201

< ON-VEHICLE REPAIR >

[VQ35DE]

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

Torque rod

RH engine mounting insulator

RH engine mount support

Front engine mounting bracket

Front engine mounting insulator 6.

RH engine mount bracket

Lower torque rod bracket

Lower torque rod

Rear engine mounting insulator

10. Rear engine mounting bracket

11.

Rear lower insulator

ENGINE ASSEMBLY

EM-203

< REMOVAL AND INSTALLATION >

[VQ35DE]

• Use the correct supporting points for lifting and jacking. Refer to

GI-33, "Garage Jack and Safety

Stand"

• 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

EC-1579, "Inspection"

2. Drain coolant. Refer to

CO-35, "Changing Engine Coolant"

3. Drain power steering fluid. Refer to

ST-8, "Draining"

4. Drain transaxle fluid. Refer to

TM-17, "Draining"

(M/T),

TM-241, "Changing"

(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

EM-129,

"Removal and Installation"

9. Remove battery and tray. Refer to

PG-68, "Removal and Installation"

(Coupe models) or

PG-139,

"Removal and Installation"

(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

FSU-12, "Exploded View"

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

CL-12, "Exploded View"

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-

tion"

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)"

and

FAX-12,

"Removal and Installation (Right Side)"

24. Remove the front exhaust tube using power tools. Refer to

EX-11, "Exploded View"

25. Remove the cooling fan assembly. Refer to

CO-40, "Removal and Installation"

26. Discharge and recover the R134a refrigerant. Refer to