ZDX V6-3.7L (2010)
7. The actual valve seating surface (B), as shown by the blue compound, should be centered on the seat.
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If it is too high (closer to the valve stem), you must make a second cut with the 67.5 ° cutter (intake seat) or the 60 ° cutter (exhaust seat) to
move it down, then one more cut with the 45 ° cutter to restore seat width.
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If it is too low (closer to the valve edge), you must make a second cut with the 30 ° cutter to move it up, then one more cut with the 45 ° cutter
to restore seat width.
NOTE: The final cut should always be made with the 45 ° cutter.
8. Insert the intake and exhaust valves in the head, and measure the valve stem installed height (A).
9. If the valve stem installed height is over the service limit, replace the valve and recheck. If it is still over the service limit, replace the cylinder
head; the valve seat in the head is too deep.
