2010 INFINITI QX56 Factory Service Manual

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INFINITI QX56 2010  Factory Service Manual EM-70
< ON-VEHICLE REPAIR >
CYLINDER HEAD
• After cooling down the engine, again check oil/fluid levels including engine oil and engine coolant. Refill tospecified level if necessary.
• Summary of

Page 1922 of 4210

INFINITI QX56 2010  Factory Service Manual CYLINDER HEADEM-71
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3. Remove the valve collet using Tools. 
CAUTION:
When working, take care not to  damage valve lifter holes.
4. Remove the valve

Page 1923 of 4210

INFINITI QX56 2010  Factory Service Manual EM-72
< ON-VEHICLE REPAIR >
CYLINDER HEAD
6. Install the valve springs.• Install the narrow pitch end (paint mark side) to the cylinderhead side.
7. Install the valve spring retainers.
8. Install th

Page 1924 of 4210

INFINITI QX56 2010  Factory Service Manual CYLINDER HEADEM-73
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2. Measure the bottom surface of the cylinder head for distortion in
six directions as shown, using suitable tools.
• If measu

Page 1925 of 4210

INFINITI QX56 2010  Factory Service Manual EM-74
< ON-VEHICLE REPAIR >
CYLINDER HEAD
VALVE GUIDE REPLACEMENT
When the valve guide is removed, replace it with an oversized (0.2 mm, 0.008 in) valve guide.
1. To remove the valve guide, heat the c

Page 1926 of 4210

INFINITI QX56 2010  Factory Service Manual CYLINDER HEADEM-75
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5. Press the valve guide from the camshaft side to the dimensions
as shown.
CAUTION:
Cylinder head contains heat . When working,

Page 1927 of 4210

INFINITI QX56 2010  Factory Service Manual EM-76
< ON-VEHICLE REPAIR >
CYLINDER HEAD
3. Heat the cylinder head to 110° to 130° C (230° to 266° F) by
soaking it in heated oil.
4. Cool the valve seats well with dry ice. Force fit the valve s

Page 1928 of 4210

INFINITI QX56 2010  Factory Service Manual CYLINDER HEADEM-77
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• Set try square along the side of valve spring and rotate the spring.
Measure the maximum clearance between the top face of s