Maxima V6-3.5L (VQ35DE) (2007)
stop to ensure this.
2. Ream cylinder head recess for service valve seat.
Oversize: 0.5 mm (0.020 in)
Intake: 38.500 - 38.516 mm (1.5157 - 1.5164 in)
Exhaust: 32.700 - 32.716 mm (1.2874 - 1.2880 in)
Be sure to ream in circles concentric to the valve guide center.
This will enable valve seat to fit correctly.
3. Heat cylinder head to 110° to 130°C (230° to 266°F) by soaking in heated oil.
4. Press fit valve seat until it seats on the bottom.
5. Cut or grind valve seat using suitable tool to the specified dimensions.
6. After cutting, lap valve seat with abrasive compound.
7. Check valve seating condition.
Seat face angle "a": 45° degrees
Contacting width "W" for intake: 1.09 - 1.31 mm (0.0429 - 0.0516 in)
Contacting width "W" for exhaust: 1.29 - 1.51 mm (0.0508 - 0.0594 in)
8. Use a depth gauge to measure the distance between the mounting surface of the cylinder head spring seat and the valve stem end. If the distance is
shorter than specified, repeat step 5 to adjust it. If it is longer, replace the valve seat with a new one.
Valve seat resurface limit "L" intake: 41.07 - 41.67 mm (1.6169 - 1.6405 in)
Valve seat resurface limit "L" exhaust: 41.00 - 41.60 mm (1.6142 - 1.6378 in)
VALVE SPRING SQUARENESS
Set try square along the side of valve spring and rotate the spring. Measure the maximum clearance between the top face of spring and try square.
Out-of-square limit: Less than 2.0 mm (0.079 in)
VALVE SPRING DIMENSIONS AND VALVE SPRING PRESSURE LOAD