Camshafts

Make

Alfa Romeo

Model

145/146 Factory Service Manual

Year

1994–1999

Section

Engine › Camshafts

Technical data and maintenanceCamshafts

Camshafts

Diameter of camshafts’ pins "a"	26.000 ÷ 26.015
Diameter of phase transformer pin "b"	49.985 ÷ 50.000
Nominal cam lift	Intake	9.50
	Exhaust	9.50
	Play between camshafts’ pins and corresponding seats	0.03 ÷ 0.07
Camshafts’ end play	0.10 ÷ 0.23

Phase transformer’s half bearings

Thickness of phase transformer half bearings "a"	2.992 ÷ 2.998
Play between phase transformers and corresponding bearings	0.034 ÷ 0.086

ANGULAR VALUES OF THE TRUE DIAGRAM OF THE TIMING SYSTEM (applying a check play of 0.45 mm)

			Engines AR 67204	Engines AR 32301
Intake	Opening (before TDC)	"a"	0° 25°(*)	-3° 22°(*)
	Closing (after BDC)	"b"	55° 30°(*)	51° 26°(*)
	Angular intake value	"c"	235°	228°
Exhaust	Opening (before BDC)	"d"	50°	47°
	Closing (after TDC)	"e"	8°	4°
	Angular exhaust value	"f"	238°	231°

(*) : Values obtained with operating phase transformer

(1) Scarico

(2) Intake

(A) P.M.S.

(B) BDC

02 Maintenance