Infiniti QX56 (JA60). Manual - part 476

 

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Infiniti QX56 (JA60). Manual - part 476

 

 

EM-58

< ON-VEHICLE REPAIR >

CAMSHAFT

Camshaft End Play

• Install dial gauge in the thrust direction on the front end of the cam-

shaft. Measure the end play when the camshaft is moved forward/

backward (in direction to axis).

• If measurement is out of the specified range, replace the camshaft

and measure again.

• If measurement is still out of the specified range, replace the cylin-

der head.

• Measure the following parts if end play is outside the specified

value.

- Dimension 

″A″ for camshaft No. 1 journal

- Dimension 

″B″ for cylinder head No. 1 journal

• If measurements are not within specification, replace the camshaft

and/or cylinder head.

Camshaft Sprocket Runout

1. Install the camshaft in the cylinder head.
2. Install the camshaft sprocket to the camshaft.
3. Measure the camshaft sprocket runout.

• If measurement exceeds the specification, replace the cam-

shaft sprocket.

Valve Lifter

Check if the surface of the valve lifter has any wear or cracks.

• If any damage is found, replace the valve lifter.

• Select the thickness of the head so that the valve clearance is

within the standard when replacing. Refer to 

EM-18, "Valve Clear-

ance"

.

Valve Lifter Clearance

 Valve Lifter Diameter 

Standard

: 0.115 - 0.188 mm (0.0045 - 0.0074 in)

PBIC0042E

Standard

: 30.500 - 30.548 mm (1.2008-1.2027 in)

Standard

: 30.360 - 30.385 mm (1.1953-1.1963 in)

KBIA2426J

Runout

: Less than 0.15 mm (0.0059 in)

KBIA0181J

KBIA0182E

CAMSHAFT

EM-59

< ON-VEHICLE REPAIR >

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• Measure the diameter of the valve lifter.

Valve Lifter Hole Diameter

• Measure the diameter of the valve lifter hole of the cylinder head,

using suitable tool.

Calculation of Valve Lifter Clearance

(Valve lifter clearance) = (valve lifter hole diameter) – (valve lifter

diameter)

• If the measurement is not within specification, referring to each

specification of the valve lifter diameter and hole diameter, replace

either or both the valve lifter and cylinder head.

INSTALLATION

1. Install the valve lifters if removed.

• Install removed parts in their original locations.

2. Install the camshafts. use the table below for identification of the

RH and LH, and intake and exhaust.

• Install so that the RH bank (B) dowel pins (A) and LH bank (C)

dowel pins (A) at the front of the camshaft face are in the

direction shown.

Standard

: 33.977 - 33.987 mm (1.3377 - 1.3381 in)

JEM798G

Standard

: 34.000 - 34.016 mm (1.3386 - 1.3392 in)

Standard

: 0.013 - 0.039 mm (0.0005 - 0.0015 in)

PBIC0043E

Bank

INT EXH

Identification 

paint (front)

Identification 

paint (rear)

Identification 

rib

RH

INT

Pink

Yes

EXH

Orange

Yes

LH

INT

Pink

No

EXH

Orange

No

KBIA2523E

WBIA0708E

EM-60

< ON-VEHICLE REPAIR >

CAMSHAFT

3. Install the RH bank (B) and LH bank (D) camshaft brackets (A).

• Install by referring to the installation location mark (E) on the

upper surface.

• Install so that the installation location mark (E) can be correctly

read when viewed from the intake manifold side (C).

-

: Front

• Install No. 1 camshaft bracket using the following procedure:

• C:11 mm (0.43 in)

• D: 2.0 - 3.0 mm (0.079 - 0.118 in) dia.

- Apply liquid gasket to No. 1 camshaft bracket (A) and (B) as

shown.

Use Genuine RTV Silicone Sealant or equivalent. Refer to

GI-15, "Recommended Chemical Products and Sealants"

.

CAUTION:

• After installation, be sure to wipe off any excessive liq-

uid gasket outside of application (C) and (D) both on RH

and LH sides.

• Remove completely any excess of liquid gasket inside

bracket.

- Apply liquid gasket (C) to the back side of the LH (A) bank

front cover and RH (B) bank front cover as shown.

Use Genuine RTV Silicone Sealant or equivalent. Refer to

GI-15, "Recommended Chemical Products and Sealants"

.

- C: 2.6 - 3.6 mm (0.102 - 0.142 in) dia.

AWBIA0164ZZ

WBIA0710E

WBIA0711E

CAMSHAFT

EM-61

< ON-VEHICLE REPAIR >

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- Position No. 1 camshaft bracket close to the mounting posi-

tion, and then install it to prevent from touching liquid gasket

applied to each surface.

- Temporarily tighten the RH (A) and LH (B) front cover bolts (4

for each bank) as shown.

4. Tighten the camshaft bracket bolts as follows:

CAUTION:

After tightening the camshaft bracket bolts, be sure to wipe

off excessive liquid gasket from the parts listed below.

• Mating surface of rocker cover

• Mating surface of front cover

• A: RH bank

• B: Exhaust side

• C: LH bank

• D: Intake side

: Front

a. Tighten the RH (A) and LH (B) front cover bolts (4 for each bank)

as shown to the specified torque.

SBIA0259E

WBIA0706E

Camshaft bracket bolts
Step 1 (bolts 9 - 12)

: 1.96 N·m (0.2 kg-m, 17 in-lb)

Step 2 (bolts 1 - 8)

: 1.96 N·m (0.2 kg-m, 17 in-lb)

Step 3 (all bolts)

: 5.88 N·m (0.6 kg-m, 52 in-lb)

Step 4 (all bolts)

: 10.4 N·m (1.1 kg-m, 92 in-lb)

WBIA0707E

Front cover bolts : 11.0 N·m (1.1 kg-m, 8 ft-lb)

WBIA0706E

 

 

 

 

 

 

 

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