21
Model Code Page
21. Engine
205-- 555 210 3
1. 7. 1989
10. 1. 1992
Valves, rocker arms and tappets (205---555)
Valve timing
At a valve clearance of 0,30 mm:
--- inlet valve opens at 10˚ B.T.D.C.............................................................
--- inlet valve closes at 42˚ A.B.D.C.............................................................
--- exhaust valve opens at 42˚ B.B.D.C..........................................................
--- exhaust valve closes at 10˚ A.T.D.C..........................................................
Valve clearance, cold or warm engine:
--- in l e t v a lv e 0,30 mm....................................................................
--- ex ha u s t v a lv e 0,30 mm.................................................................
Seat angle in cylinder head 30˚±5’........................................................
Seat width 1,0---1,5 mm......................................................................
V alve seat angle 29
_30’±5’.................................................................
Valve head diameter:
--- in l e t v a lv e 39 mm (45 mm, 355,455, 555)....................................................................
--- ex ha u s t v a lv e 39 mm (40 mm, 355, 455, 555).................................................................
Stem diameter, inlet valve 9.465---9.480 mm.........................................................
Stem diameter, exhaust valve 9.445---9.460 mm......................................................
Clearance, valve stem---guide, inlet valve 0.040---0.070 mm............................................
Clearance, valve stem---guide, exhaust valve 0.060---0.090 mm.........................................
Maximum wear limit, inlet valve 0.30 mm....................................................
Maximum wear limit, exhaust valve 0.35 mm.................................................
V alve guide I.D. (before fitting) 9.520---9.535 mm.....................................................
Valve guide O.D 16.028---16.039 mm.................................................................
Bore in cylinder head for valve guide 16.000---16.018 mm................................................
Height of valve guide above cylinder head face 21 mm.......................................
Distance between cylinder head and valve head 1.2---1.4 mm......................................
V alve spring, free length:
--- inner spring 57 mm...................................................................
--- outer spring 61 mm...................................................................
Loading when valve spring is compressed to:
--- inner spring, 41.5 mm 70---90 N..........................................................
--- outer spring, 47 mm 190---210 N...........................................................
Rocker arm shaft diameter 19.959---19.980 mm........................................................
Rocker arm bushing I.D. (bushing fitted) 19.990---20.010 mm.............................................
Rocker arm bushing O.D. (before fitting) 23.035---23.048 mm.............................................
Rocker arm hole diameter 23.000---23.021 mm.........................................................
Pushrod length 231
--- 1
(238
--- 1
, 455)..................................................................
Pushrods must be straight to within 0.4 mm.................................................
Rocker arm shaft spring, free length 80 mm................................................
Loading when rocker arm shaft spring is compressedto 58 mm 80---100 N.........................
Tappet O.D 29.939---29.960 mm.....................................................................
Bore in cylinder block for tappet 30.000---30.021 mm....................................................
Camshaft (205, 305, 405)
Bearing journal no. 1, diameter 49.925---49.950 mm....................................................
Bearing journal nos 2---4, diameter 49.885---49.910 mm.................................................
Bearing no. 1, bore 50.040---50.060 mm...............................................................
Bearings nos 2---4, bore 50.000---50.025 mm..........................................................
Radial clearance no. 1 0.090---0.135 mm............................................................
Radial clearance nos. 2---4 0.090---0.140 mm........................................................
Tolerance, 1st bushing in block 0.025---0.080 mm....................................................
Camshaft end float (with 0.5 mm gasket betweencylinder block and timing gear
casing and betweentiming gear casing and front cover) 0.045---1.550 mm................................
Cam height (distance between cam lobe top and opposite side).41.44 mm
Camlift(lobetopheightabovethe“circle”) 7.44mm..........................................
Max. permissible figure for out---of---roundness 0.03 mm.......................................
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