26
Model Code Page
21. Engine
1. 8. 1998
6000--8750 210 4
1. 1. 1994
Inside diameter of valve guide before fitting 9,000...9,015 mm..........................................
Outside diameter of valve guide 16,028...16,039 mm....................................................
Diameter of valve guide bore in cylinder head 16,000...16,018 mm........................................
Protrusion of valve guide top above cylinder head surface 21 mm..............................
Depth of valve face below cylinder head surface:
--- i n l e t v a lv e 0,7±0,05 mm....................................................................
--- exhaust valve 0,6±0,05 mm.................................................................
Valvespringfreelength 69,8mm...........................................................
Spring pressure when spring compressed to a length of:
--- 4 8 , 6 m m 327±17 N.....................................................................
--- 3 7 , 4 m m 500±23 N.....................................................................
Rocker arm shaft diameter 19,959...19,980........................................................
Inside diameter of rocker arm bearing bush:
--- (when fitted in position) 19,990...20,010 mm.........................................................
Outside diameter of rocker arm bearing bush 23,035...23,075 mm........................................
Diameter of rocker arm bore 23,000...23,021 mm.......................................................
Max. permissible push rod deflection (when free) 0,4 mm.....................................
Free length of rocker arm spring 80 mm...................................................
Spring pressure when spring compressed to a length 58 mm 80...100 N...........................
Outside diameter of tappet 29,939...29,960 mm........................................................
Diameter of tappet bore in cylinder block 30,000...30,043 mm............................................
Engines from week 34 1996:
Rocker arm shaft diameter 22,970...22,990 mm........................................................
Diameter of rocker arm bore 23,000...23,021 mm.......................................................
Camshaft
Diameter of camshaft bearing journal no 1 49,925...49,950 mm...........................................
Diameter of camshaft bearing journals (others that no 1) 49,885...49,910 mm...............................
Diameter of camshaft bearing journals nos 2, 3 and 4 (620/634---engines) 49,865...49,890 mm................
Inside diameter of camshaft bearing bushes (when fitted in position) 50,010...50,070 mm.....................
Diameter of camshaft bearing bores (others than no 1) 50,000...50,025 mm................................
Camshaft clearance in bearing bush no 1 0,060...0,145 mm............................................
Camshaft clearance in bearing bushes (o thers than no 1) 0,090...0,140 mm..............................
Camshaft clearance in bearing bushes nos 2, 3 and 4 (620/634---engines) 0,110...0,160 mm................
Bearing bush tolerance in block (press fit) 0,025...0,080 mm...........................................
Diameter of bearing bush bore in block 55,620...55,650 mm
Camshaft end play with 0,5 mm gasket between cylinder block and timing gear
housing and between t iming gear housing and front cover 0,5...1,0 mm.............................
Cam height (distance between back of cam and tip of cam):
--- inlet valve 41,180...41,430 mm......................
--- exhaust valve 40,080...40,330 mm...................
Cam lift:
--- inlet valve 7,38 mm......................
--- exhaust valve 8 ,28 mm...................
Camshaft max permissible deflection (total indicator reading) 0,03 mm...........................
Cylinder liners
Protrusio n of cylinder liner above cylinder block top face 0,030...0,080 mm...............................
Max. permissible height difference between liners (under same head) 0,02 mm....................
Outer diameter of cylinder liner guide:
--- at upper end o f liner 124,475...124,500 mm..............
--- at lower end of liner 122,961...122,986 mm..............
Liner bore 108,000...108,022 mm........................
Height of cylinder liner flange 9,03...9,05 mm........
Height of cylinder liner flange, 1st oversize, part no 8366 47933 9,08...9,10 mm.........................
Height of cylinder liner flange, 2nd o versize, part no 8366 47934 9,13...9,15 mm........................
Height of cylinder liner flange, 3rd oversize, part no 8366 47935 9,23...9,25 mm.........................
Outer diameter of cylinder l iner flange 131,700...131,800 mm.
Piston, rings and g udgeon pin
Minimum distance between piston and cylinder head (measured with a piece
of lead wire thought the injector location hol e ) 0,900...1,150 mm........................................
Piston diameter:
--- 17 mm from lower edge (320, 420, 620---engines) 107,873...107,887 mm..................................
--- 19 mm from lower edge (634---engines) 107,883...107,897 mm...........................................
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