ZDX V6-3.7L (2010)
Valve Seat: Service and Repair
Valve Seat Reconditioning
1. Inspect valve stem-to-guide clearance See: Service and Repair/Overhaul/Valve Stem-to-Guide Clearance Inspection. If the valve guides are worn,
replace them See: Service and Repair/Overhaul/Valve Guide Replacement before cutting the valve seats.
2. Renew the valve seats in the cylinder head using a valve seat cutter.
3. Carefully cut a 45 ° seat, removing only enough material to ensure a smooth and concentric seat.
4. Bevel the upper and lower edges at the angles shown in the illustration.
Check the width of the seat and adjust accordingly.
5. Make one more very light pass with the 45 ° cutter to remove any possible burrs caused by the other cutters.
6. After resurfacing the seat, inspect it for even valve seating. Apply Prussian Blue compound (A) to the valve face. Insert the valve in its original
location in the head, then lift it and snap it closed against the seat several times.
