Driving shaft

Make

Alfa Romeo

Model

145/146 Factory Service Manual

Year

1994–1999

Section

Engine › Driving shaft

Technical data and maintenanceDriving shaft

Driving shaft

Unit: mm
Diameter of main journals "a"	Class A - Red	52.994 ÷ 53.000
	Class B - Blue	52.988 ÷ 52.994
	Class C - Yellow	52.982 ÷ 52.988
Undersize by 0.127
Diameter of connecting rod pins "b"	Class A - Red	50.799 ÷ 50.805
	Class B - Blue	50.793 ÷ 50.799
	Class C - Yellow	50.787 ÷ 50.793
Undersize by 0.127
Length of central main journal "c"	26.575 ÷ 26.625
Maximum taper of main journals and rod pins	0.0045
Maximum concentricity error between main journals and rod pins	0.003

Half bearings

Unit: mm
Thickness of half bearings "a"	Class A - Red	1.836 ÷ 1.840
	Class B - Blue	1.839 ÷ 1.843
	Class C - Yellow	1.842 ÷ 1.846
Undersize by 0.127
Functioning play between pins and half bearings	0.025 ÷ 0.052

Counter-rotating shafts

Unit: mm
Pins' diameter of counter-rotating shafts	Front "a"	19.980 ÷ 19.993
	Central "b"	36.945 ÷ 36.960
	Rear "c"	19.990 ÷ 20.010
Diameter of central bushings	Internal "d"	37.020 ÷ 37.040
	External "e"	40.065 ÷ 40.090
Diameter of ball bearings	Internal "f"	19.990 ÷ 20.000
	External "g"	46.989 ÷ 47.000
Interference between central bushings and corresponding seats	0.056 ÷ 0.111
Radial play between bushings and central pins	0.060 ÷ 0.095
Play / Interference between ball bearings and corresponding seats on the block	+0.011 ÷ -0.025
Play / Interference between ball bearings and pins of counter-rotating shafts	Front	+0.020 ÷ -0.003
	Rear	+0.010 ÷ -0.020

02 Maintenance