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STANDARD PROCEDURE - REFACING NOTE: Valve seats that are worn or burned can be NOTE: When refacing valves (4) and valve seats, it 1. Using a suitable dial indicator measure the center of the valve seat Total run out must not exceed 2. Apply a small amount of Prussian blue to the valve seat, insert the valve into the cylinder head, while 3. When the seat is properly positioned the width of the intake seat must be 1.75 - 2.36 mm (0.0689 - 0.0928 in.) and the exhaust seat must be 1.71 - 2.32 mm (0.0673 - 0.0911 in.). 4. Check the valve spring (6) installed height after refacing the valve and seat. The installed height for both intake and exhaust valve springs must not exceed 40.74 mm (1.6039 in.). 5. The valve seat and valve face must maintain a face angle of 44.5 - 45 ° angle . REMOVAL NOTE: The cylinder heads must be removed in order to preform this procedure. 1. Remove rocker arms and lash adjusters. Refer to procedures in this section. 9 - 1360 ENGINE - 4.7L SERVICE INFORMATION WK |