Nissan Altima L32. Instruction — part 661

EM-180

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CAMSHAFT

6. Install exhaust and intake camshafts and camshaft brackets.

• Intake camshaft has a drill mark on camshaft sprocket mount-

ing flange.

• Follow your identification marks made during removal, or fol-

low the identification marks that are present on the new cam-

shafts components for proper placement and direction of the

components.

• Position the camshafts:

RH exhaust camshaft dowel pin at about 10 o'clock.

LH exhaust camshaft dowel pin at about 2 o'clock.

SEM652F

Bank

INT/EXH

ID mark

Drill mark

Paint marks

M1

M2

RH

INT

1A

Yes

Blue

No

EXH

1C

No

No

Blue

LH

INT

1B

Yes

Blue

No

EXH

1D

No

No

Blue

SEM653F

KBIA1072E

CAMSHAFT

EM-181

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7. Before installing camshaft brackets, apply sealant to mating sur-

face of No. 1 camshaft bracket.

• Use Genuine Silicone RTV Sealant, or equivalent. Refer to

GI-15, "Recommended Chemical Products and Sealants"

.

• Before installation, wipe off any protruding sealant.

• Refer to

EM-111, "Precaution for Liquid Gasket"

.

• Install camshaft brackets in their original positions and direc-

tion. Align the stamp marks as shown.

• If checking and adjusting any part of valve assembly or

camshaft, check valve clearance according to the refer-

ence data. Refer to

EM-124, "Valve Clearance"

.

SEM446G

PBIC0915E

Valve clearance (cold) Intake

: 0.26 - 0.34 mm
(0.010 - 0.013 in)

Valve clearance (cold) Exhaust

: 0.29 - 0.37 mm
(0.011 - 0.015 in)

SEM564G

EM-182

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[VQ35DE]

CAMSHAFT

• Tighten the camshaft brackets in the three steps, in numerical order as shown.

8. Measure difference in levels between front end faces of No. 1

camshaft bracket and cylinder head.

• If measurement is outside the specified range, re-install cam-

shaft and camshaft bracket.

9. Install the IVT control solenoid valves with new gaskets. Refer to

EM-155, "Removal and Installation"

.

10. If necessary, install camshaft position sensor (PHASE) (RH and LH bank.)
11. Install the fuel rail and injectors. Refer to

EM-146, "Removal and Installation"

.

12. Install the timing chains. Refer to

EM-166, "Installation"

.

INSPECTION AFTER REMOVAL

Camshaft Visual Check

Check camshaft for scratches, seizure and wear. Replace if necessary.

Camshaft Runout

1

1.96 N·m (0.2 kg-m, 17 in-lb)

Tighten No.s 7 to 10, then

tighten 1 to 6 in order as

shown.

2

5.88 N·m (0.6 kg-m, 52 in-lb)

Tighten in numerical order

as shown.

3

9.02 - 11.8 N·m (0.92 - 1.20

kg-m, 79.9 - 104.2 in-lb)

Tighten No. 1 -6 in the nu-

merical order as shown.

SEM885EA

SEM886EA

Standard

: – 0.14 (– 0.0055 in)

EMQ0044D

WBIA0169E

CAMSHAFT

EM-183

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1. Put V-block on precise flat bed and support No. 2 and No. 4 jour-

nal of camshaft as shown.

2. Set dial gauges vertically to No. 3 journal as shown.
3. Turn camshaft in one direction slowly by hand, measure the

camshaft runout on the dial gauges.

• Runout is the largest indicator reading after one full revolution.

4. If actual runout exceeds the limit, replace the camshaft.

Camshaft Cam Lobe Height

1. Measure camshaft cam lobe height as shown. Refer to

EM-229,

"Camshaft"

.

2. If wear has reduced the lobe height below specifications,

replace the camshaft.

Camshaft Journal Clearance

Outer Diameter of Camshaft Journal

• Measure outer diameter of camshaft journal as shown.

Inner Diameter of Camshaft Bracket
1. Tighten camshaft bracket bolt with specified torque.
2. Using inside micrometer, measure inner diameter (A) of cam-

shaft bearing.

Calculation of Camshaft Journal Clearance

(Journal clearance) = (inner diameter of camshaft bracket) – (outer diameter of camshaft journal)

Camshaft Runout
Standard

: Less than 0.02 mm (0.0008 in)

Limit

: 0.05 mm (0.0020 in)

PBIC0929E

SEM549A

Standard outer diameter
No.1

: 25.935 - 25.955 mm
(1.0211 - 1.0218 in)

Standard outer diameter
No.2, 3, 4

: 23.445 - 23.465 mm
(0.9230 - 0.9238 in)

SEM012A

Standard inner diameter
No.1

: 26.000 - 26.021 mm
(1.0236 - 1.0244 in)

Standard inner diameter
No.2, 3, 4

: 23.500 - 23.521 mm
(0.9252 - 0.9260 in)

SEM862E