possible to replace valve seat inserts. (page 2 of 2)

54. Remove and discard spring ring retaining rocker arm on shaft.
55. Remove rocker arm. Remove and discard 2nd spring ring.
56. Repeat above procedures for remaining rocker arms keeping them in their fitted order.

57. Clean rocker arms and shaft, ensure oilways are clear.

CAUTION: Identify type of rocker shaft fitted. Engine Serial No. Prefixes 10P to 14P – Type A rocker shaft; Engine Serial No. Prefixes 15P to 19P – Type B rocker shaft. Type B rocker shafts and arms may be fitted to Engine Serial No. Prefixes 10P to 14P as an assembly.

58. Check diameter of each rocker arm journal on shaft, take 2 measurements at 180°: l Journal diameter = 26.971 to 26.998 mm (1.061 to 1.063 in)

59. Using a vernier, check internal diameter of each rocker arm, take 2 measurements at 180°: l Rocker arm internal diameter = 27.0 to 27.013 mm (1.062 to 1.064 in)
60. Fit new spring ring to groove in rocker shaft.
61. Lubricate rocker shaft journals and rocker arms with engine oil.
62. Fit rocker arm to shaft ensuring it is in its original fitted order.
63. Fit new spring ring to retain rocker arm.
64. Repeat above procedures for remaining rocker arms ensuring they are in their original fitted order.
65. Fit new rocker adjusting screws and locknuts to rocker arms; do not tighten screws fully into arms at this stage.

CAUTION: Ensure screws are correct for type of rocker arms fitted. Replacement screws for Engine Serial No. Prefixes 15P to 19P have a centre punch mark adjacent to the adjusting slot. These screws are not interchangeable with those fitted to Engine Serial No. Prefixes 10P to 14P.