V45 CYLINDER HEAD/VALVE Valve spring Free length Inner 40.7 mm (1.60 in) 39.35 mm (1.55 in) Outer 43.9 mm (1.73 in) 42.43 mm (1.67 in) Preload/length Inner 6.39-7.81 kg/34.5 mm (14.10-17.22 6.08 kg/34.5 mm lb/1.36 in) (13.41 lb/1.36 in) Outer 12.6-14.6 kg/375 mm (27.80-32.19 11.99 kg/37.5 mm lb/1.48 in) (26.43 lb/1.48 in) Cylinder head Warpage - 0.25 mm (0.010 in) TORQUE VALUES Cylinder head cover Camshaft holder 6 mm Cam chain guide A Cylinder head 9 mm Cylinder head 8 mm Rocker arm shaft Cam sprocket 8-12 N-m (0.8-1.2 kg-m, 6-9 ft-lb) 10-14 N•m (1.0-1.4 kg-m, 7-10 ft-lb) 20-25 N•m (2.0-2.5 kg-m, 14-18 ft-lb) Apply LOCKTITE® to the threads. 33-37 N-m (3.3-3.7 kg-m, 24-27 ft-lb) 21-25 N.m (2.1-2.5 kg-m, 15-18 ft-lb) 45-50 N.m (4.5-5.0 kg-m, 33-36 ft-lb) 18-20 N-rn (1.8-2.0 kg-m, 13-14 ft-lb) TOOLS Special Valve gudie reamer, 5.5 mm Valve guide driver Common Valve spring compressor Valve guide remover 5.5 mm 07984-2000000 07942-3290200 or 07742-0020200 07757-0010000 07742-0010100 TROUBLESHOOTING Engine top-end problems usually affect engine performance. These can be diagnosed by a compression test, or by tracing noises to the top-end with a sounding rod or stethoscope. . Low compression 1. Valves - Incorrect valve adjustment - Burned or bent valves - Incorrect valve timing - Broken valve spring 2. Cylinder head - Leaking or damaged head gasket - Warped or cracked cylinder head 3. Cylinder and piston (Refer to Section 12) Compression too high 1. Excessive carbon build-up on piston or combustion chamber Excessive noise 1. Incorrect valve adjustment 2. Sticking valve or broken valve spring 3. Damaged or worn camshaft 4. Loose or worn cam chain 5. Worn or damaged cam chain tensioner 6. Worn cam sprocket teeth 7. Worn rocker arm and/or shaft 10-2 136 Date of Issue: October, 1982 CO HONDA MOTOR CO., LTD