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VALVE FACE AND VALVE SEAT ANGLE CHART DESCRIPTION SPECIFICATION SEAT WIDTH INTAKE 1.018 - 1.62 mm (0.0464 - 0.0637 in.) EXHAUST 1.48 - 1.92 mm (0.058 - 0.075 in.) FACE ANGLE (INT. AND EXT.) 45° - 45 1 ⁄ 2 ° SEAT ANGLE (INT. AND EXT.) 44 1 ⁄ 2 ° - 45° 5. The valve seat must maintain an angle of 44.5 – 45.0 degrees angle. 6. The valve face must maintain a face angle of 45.0 – 45.5 degrees angle. REMOVAL 1. Remove the cylinder head (Refer to 9 - ENGINE/CYLINDER HEAD - REMOVAL). 2. Compress valve springs using Valve Spring Compressor Tool special tool # C-3422and adapter 8464. 3. Remove valve retaining locks, valve spring retainers, valve stem seals and valve springs. 4. Before removing valves, remove any burrs from valve stem lock grooves to prevent damage to the valve guides. Identify valves to ensure installation in original location. INSTALLATION 1. Clean valves thoroughly. Discard burned, warped and cracked valves. 2. Remove carbon and varnish deposits from inside of valve guides with a reliable guide cleaner. 3. Measure valve stems for wear. If wear exceeds 0.051 mm (0.002 inch), replace the valve. 4. Coat valve stems with lubrication oil and insert them in cylinder head. 5. If valves or seats are reground, check valve stem height. If valve is too long, replace cylinder head. 6. Install new seals on all valve guides. Install valve springs and valve retainers. 9 - 2334 ENGINE - 5.7L - SERVICE INFORMATION DR/DH |