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8 SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS Type F3B CYLINDER HEAD - VALVE TRAIN mm ∅ 1 Valve guide housings ∅1 15.980 to 15.997 2 ∅ Valve guide ∅2 10.015 to 10.030 ∅ 3 Valve guide ∅2 ∅3 16.012 to 16.025 Valve guides - housings 0.015 to 0.045 Valve guide - ∅ 4 Valves: ∅4 α 9.960 to 9.975 60 ° 30′ ± 7′ 30″ α ∅4 α 9.960 to 9.975 45 ° 30’ ± 7′ 30″ Valve stem and its guide 0.040 to 0.070 Valve seat in head ∅1 49.185 to 49.220 ∅ 1 ∅1 46.985 to 47.020 Outside diameter of valve 2 ∅ Outside diameter of valve ∅2 49.260 to 49.275 ∅2 α 60 ° - 30’ α α ∅2 47.060 to 47.075 ∅2 α 45 ° - 30′ X Recessing of valve 0.45 to 0.75 X Recessing of valve X 1.65 to 1.95 Between valve Between valve 0.040 to 0.090 0.040 to 0.090 |