QX56 AWD V8-5.6L (VK56DE) (2005)
Oversize [0.5 mm (0.020 inch)] (Service):
Intake: 38.500 - 38.516 mm (1.5157 - 1.5164 inches)
Exhaust: 32.700 - 32.716 mm (1.2874 - 1.2880 inches)
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Be sure to ream in circles concentric to the valve guide center.
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This will enable valve seat to fit correctly.
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 seat into the cylinder head.
CAUTION:
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Avoid directly touching cold valve seats.
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Cylinder head contains heat. When working, wear protective equipment to avoid getting burned.
5. Finish the seat to the specified dimensions using suitable tool. Refer to "Valve Seat".
CAUTION: When using valve seat cutter, firmly grip the cutter handle with both hands. Then, press on the contacting surface all around the
circumference to cut in a single drive. Improper pressure on the cutter or cutting many different times may result in stage valve seat.
6. Grind to obtain the dimensions indicated as shown.
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Using compound, grind to adjust valve fitting.
7. Check again for normal contact. Refer to "VALVE SEAT CONTACT".
VALVE SPRING SQUARENESS