Valve springs

Make

Alfa Romeo

Model

145/146 Factory Service Manual

Year

1994–1999

Section

Engine › Valve springs

Technical data and maintenanceValve springs

Valve springs

Free length "L1"	53.9 mm
Spring length with valves closed "L2"	36 mm
Load corresponding to spring length with valves closed	36.7 ÷ 39.6 daN (37.4 ÷ 40.4 kg)
Length of springs with valves open "L3"	26.5 mm
Load corresponding to spring length with valves open	55.9 ÷ 60.8 daN (57 ÷ 62 kg)

Plates

Thickness of plates "a"

3.25 ÷ 4.40 mm

Valve cups

Diameter of valve cups "a"	36.975 ÷ 36.995
Radial clearance between valve cups and housings	0.005 ÷ 0.050

Camshaft

Diameter of camshaft journals	First "a"	29.945 ÷ 29.960
	Second "b"	25.500 ÷ 25.515
	Third "c"	24.000 ÷ 24.015
	Fourth "d"	23.945 ÷ 23.960
Width of shaft shoulder "e"		19.100 ÷ 19.200
Cam lift (on valve spindle without play)	Intake	8.5
	Exhaust	8.5
Radial clearance between camshaft journals and seats		0.03 ÷ 0.07
Camshaft end float		0.1

Valve clearance

Valve clearance for checking timing	Intake	0.50
	Exhaust	0.50
Operating valve clearance (with cold engine) "G"	Intake	0.30 ± 0.05
	Exhaust	0.35 ± 0.05

02 Maintenance