Technical data Big-end bearing shells Thickness in mm, standard 1.484-1.497 1.482-1.495 (.0584-.0589 i n) (.0583-.0588 i n) oversize 0.25 mm 1.609-1.622 1.607-1.620 (.0098 i n) (.0633-.0638 i n) (.0632-.0637 i n) 0.50 mm ............................ 1.734-1.747 1.732-1.745 (.0196 i n) (.0682-.0687 i n) (.0681-.0687 i n) MD2010 , MD2020 MD2030 , MD2040 Connecting rods MD2010 , MD2020 M D2030 M D2040 Fitted with replaceable bearing shells.
Diameter, gudgeon bushing's bearing position 21.000-21.021 23.000-23.021 30.500-30.516 (.8267-.8275 i n) (.9055-.9063 i n) (1.2007-1.2014 i n) Bearing shell's bearing position 19.015-19.026 21.010-21.021 28.010-28.021 (.7486-.7490 i n) (.0827-.8275 i n) (1.1027-1.1031 i n) Gudgeon bushing 19.015-19.026 21.010-21.021 28.010-28.021 (.7486-.7490 i n) (.8271-.8275 i n) (1.1027-1.1031 i n) Axial clearance, connecting rod -crankshaft 0.031-0.079 0.035-0.083 0.035-0.083 (.0012-.0031 i n) (.0013-.0032 i n) (.0013-.0032 i n) Timing gears Camshaft M D2010 M D2020 MD2030 MD2040 Drive Number of bearings Gear wheel 3 Gear wheel 3 Gear wheel 3 Gear wheel 3 Valve times:
i nlet valves open B.T.D.C 13 0 13 0 13 0 16° close A.B.D.C 430 43 0 430 40° outlet valves open B.B.D.C 430 43 0 430 46° close A.T.D.C 130 13 0 130 10 0 Valve system Valves MD2010 , MD2020 M D2030 M D2040 Spindle diameter in mm 5.960-5.975 6.94-6.95 6.955-6.970 (.2346-.2352 i n) (.2732-.2736 i n) (.2738-.2744 i n) Valve disc edge in mm 0.925-1.075 0.925-1.075 0.925-1.075 (.0364-.0423 i n) (.0364-.0423 i n) (.0364-.0423 i n) Clearance in mm, valve spindle guide 0.045-0.072 0.050-0.075 0.03-0.06 (.0017-.0028) (.0019-.0029 i n) (.0011-.0023 i n) Seat angle in cylinder head 45 0 45 0 45 0 Inlet Valve clearance in mm, cold engine 0.20 0.20 0.20 (.0078 i n) (.0078 i n) (.0078 i n) Outlet Spindle diameter in mm 5.940-5.955 6.94-6.95 6.94-6.95 (.2338-.2344 i n) (.2732-.2736 i n) (.2732-.2736 i n) Valve disc edge in mm 0.925-1.075 0.925-1.075 0.925-1.075 (.0364-.0423 i n) (.0364-.0423 i n) (.0364-.0423 i n) Clearance in mm, valve spindle guide 0.045-0.072 0.050-0.075 0.050-0.075 (.0017-.0028 i n) (.0019-.0029 i n) (.0019-.0029 i n) Seat angle in cylinder head 45° 450 45° Valve clearance in mm, cold engine 0.20 0.20 0.20 (.0078 i n) (0078 i n) (.0078 i n) 1 2