SERVICE MANUAL VALVE TRAIN - CAMSHAFT, TAPPETS & PUSH RODS Section 4 INSTALLATION Install valve train components as follows: 1. If  the  camshaft  bushings  were  removed  install new    bushings    using    the    Camshaft    Bushing Puller and Installer Tool.  Be sure the oil holes in the bushing (2, Fig.  16) line up with the oil holes in the crankcase (1) as shown. Figure 16.  - Camshaft Bushing Installation 1. Crankcase Oil Hole 2. Bushing Oil Hole 3. Mark 2. To ease oil hole alignment, mark the back-up nut (3,  Fig.    16)  in  line  with  the  bushing  oil  hole  (2) as shown when installing the bushings. NOTE:  The  bushing  and  crankcase  oil  holes  must line up. 3. If  it  is  necessary  to  replace  the  camshaft  gear, proceed as follows: a. The  drive  gear  on  the  camshaft  must  be pressed off since it is a shrink fit. b Place the thrust plate on the keyway end of the camshaft against the bearing journal. c. Insert the Woodruff Key into the keyway. d. Heat   the   camshaft   gear   to   approximately 205°C (400°F). NOTE:  Use thermomelt stick to determine temperature.  (See tool list for tool number). e. Press the gear against the shoulder on the shaft with the timing mark pointed outward as shown in Fig.  17. CAUTION:      Use   asbestos   gloves   when   installing gear. Figure 17.  - Installing Camshaft Drive Gear 4. Coat the  cam  lobes,  bearings  and  journals  with clean engine oil and install the camshaft. 5. Install  the  camshaft  so  that  the  timing  marks stamped on each gear as shown in (1, Fig.  17) are in line. 6. Alternately tighten the thrust plate cap screws to 27 N•m (20 Ibf-ft) torque. 7. Check    the    camshaft    end    play    with    a    dial indicator. 0.13 mm (0.005 in.) 0.33 mm (0.013 in.) specifications must be met. 8. Install   crankcase   front   cover   as   described   in Section 6. 9. Lubricate  the  O.D.    of  the  tappets  with  clean engine oil and tappet faces with Moly Kote "G-n" or Fel Pro C-670 paste.  Then install tappets into tappet bores. 10. Install the cylinder head and adjust valve lash as outlined in Section 3. NOTE:  It is recommended that the engine be run at 1000  RPM  from  three  to  five  minutes  after  engine  is assembled.      At   1000   RPM   the   tappets   are   under lighter  load,  thus  lubrication  of  tappets  and  tappet bores is assured. CGES-185-3 PRINTED IN UNITED STATES OF AMERICA Page 14