Valve cups

Make

Alfa Romeo

Model

155 Factory Service Manual

Year

1992–1998

Section

Valve springs › Valve cups

Engine – mechanical (Twin Spark)Valve cups

	Outer spring	48.7
Length of valve spring at rest (L1)	Inner spring	46.2
Length of closed valve spring (L2)	Outer spring	36.5
Length of spring with open valve (L3)	Inner spring	34.5
Load corresponding to spring length with valve closed	Outer spring	212 ÷ 220 N (21.6 ÷ 22.4 kg)
Load corresponding to spring length with valve open	Inner spring	115 ÷ 120 N (11.8 ÷ 12.2 kg)
Outer spring	452 ÷ 470 N (46.1 ÷ 47.9 kg)
Inner spring	244 ÷ 252 N (24.9 ÷ 25.7 kg)
Length of valve spring at rest (L1)	Outer spring	48.7
Length of valve spring at rest (L1)	Inner spring	46.2
Length of closed valve spring (L2)	Outer spring	36.5
Length of closed valve spring (L2)	Inner spring	34.5
Length of spring with open valve (L3)	Outer spring	25.5
Length of spring with open valve (L3)	Inner spring	23.5
Load corresponding to spring length with valve closed	Outer spring	212 ÷ 220 N (21.6 ÷ 22.4 kg)
Load corresponding to spring length with valve closed	Inner spring	115 ÷ 120 N (11.8 ÷ 12.2 kg)
Load corresponding to spring length with valve open	Outer spring	452 ÷ 470 N (46.1 ÷ 47.9 kg)
Load corresponding to spring length with valve open	Inner spring	244 ÷ 252 N (24.9 ÷ 25.7 kg)

Valve cups

	Diameter of valve cups (a)	34.973 ÷ 34.989
Radial play between valve cups and seating	0.011 ÷ 0.052
Diameter of valve cups (a)	34.973 ÷ 34.989
Radial play between valve cups and seating	0.011 ÷ 0.052

03 Engine