Nissan Maxima. Manual - part 548

 

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Nissan Maxima. Manual - part 548

 

 

EM-80

< REMOVAL AND INSTALLATION >

CAMSHAFT

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-21, "Recommended Chemical Products and Sealants"

.

CAUTION:

• Installation should be done within 5 minutes after apply-

ing liquid gasket.

• Do not fill the engine with oil for at least 30 minutes after

the components are installed to allow the sealant to

cure.

• Before installation, wipe off any protruding sealant.

• Refer  to 

EM-4, "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-18, "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

CAMSHAFT

EM-81

< REMOVAL AND INSTALLATION >

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• 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 camshaft position sensors (PHASE) (RH/LH).
10. Install the fuel rail and injectors. Refer to 

EM-43, "Removal and Installation"

.

11. Install the timing chains. Refer to 

EM-64, "Removal and Installation"

.

Inspection After Removal

INFOID:0000000009466041

INSPECTION 

Camshaft Visual Check 

1

1.96 N·m (0.2 kg-m, 17 in-lb)

Tighten No. 7 - 10,    then 

tighten 1 - 6 in numerical or-

der as shown.

2

5.88 N·m (0.6 kg-m, 52 in-lb)

Tighten in numerical order 

shown.

3 10.41 N·m (1.10 kg-m, 8 ft-lb)

Tighten No. 1 - 6 in the nu-

merical order shown.

(1) : Cylinder head (RH)
(A) : Camshaft (EXH) (RH)
(B) : Camshaft (INT) (RH)
(C) : Camshaft bracket

: Engine front

AWBIA1397ZZ

(2) : Cylinder head (LH)
(A) : Camshaft (INT) (LH)
(B) : Camshaft bracket
(C) : Camshaft (EXH) (LH)

: Engine front

AWBIA1398ZZ

Standard

: – 0.14 mm (– 0.0055 in)

EMQ0044D

EM-82

< REMOVAL AND INSTALLATION >

CAMSHAFT

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

Camshaft Runout

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 using suitable tool as shown.

• 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 using suitable tool as

shown. Refer to 

EM-130, "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 using suitable tool as

shown.

Inner Diameter of Camshaft Bracket
1. Tighten camshaft bracket bolt with specified torque.
2. Measure inner diameter (A) of camshaft bearing using suitable

tool as shown.

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

CAMSHAFT

EM-83

< REMOVAL AND INSTALLATION >

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• When out of the specified range, replace either or both camshaft and cylinder head.

NOTICE:

Inner diameter of camshaft bracket is manufactured together with cylinder head. Replace the whole cylinder

head assembly.

Camshaft End Play

1. Install the camshaft in the cylinder head.
2. Install suitable tool in thrust direction on front end of camshaft.

Measure end play when camshaft is moved forward/backward

(in direction to axis) as shown.

• If out of the specified range, replace with new camshaft and mea-

sure again.

• If out of the specified range again, replace with new cylinder head.

Camshaft Sprocket Runout

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

nal of camshaft as shown.

2. Install camshaft sprocket on camshaft.
3. Measure camshaft sprocket runout using suitable tool as shown.

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

Valve Lifter 

• Check if the surface of the valve lifter has any excessive wear or

cracks, replace as necessary.

Valve Lifter Clearance

Outer Diameter of Valve Lifter

Standard 
No.1

: 0.045 - 0.086 mm (0.0018 - 0.0034 in)

Standard 
No.2, 3, 4

: 0.035 - 0.076 mm (0.0014 - 0.0030 in)

Limit

: 0.15 mm (0.0059 in)

Standard

: 0.115 - 0.188 mm (0.0045 - 0.0074 in)

Limit

: 0.24 mm (0.0094 in)

SEM864E

Runout

: Less than 0.15 mm (0.0059 in)

PBIC0930E

KBIA0182E

 

 

 

 

 

 

 

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