Base q November 2006 Print 603.93.641 18 F2B ENGINE TRAKKER EURO 4/5 11 Type F2B CYLINDER HEADS - VALVE TRAIN mm 1 Valve guide housings in cylinder head 1 12.980 to 12.997 2 2 Valve guide 3 3 8.023 to 8.038 13.012 to 13.025 Valve guides - housings in the cylinder head 0.015 to 0.045 Valve guide 0.2 to 0.4 4 Valves: 4 4 7.970 to 7.985 60 30 7 30 7.970 to 7.985 + 15 45 - 0 Valve stem and its guide 0.038 to 0.068 Housing in head for valve seat 1 1 1 41.985 to 42.020 40.985 to 41.020 Outside diameter of valve seat; angle of valve seat in 2 cylinder head:
2 2 42.060 to 42.075 60 - 30 41.060 to 41.075 45 - 30 Recessing of valve XX X 0.5 to 0.8 1.6 to 1.9 Between valve seat and head 0.040 to 0.090