Angular values of actual timing diagram

Make

Alfa Romeo

Model

155 Factory Service Manual

Year

1992–1998

Section

Valve clearance › Angular values of actual timing diagram

Engine – mechanical (V6)Angular values of actual timing diagram

Unit: mm
Valve clearance (cold engine)	(Ga) Intake	0.475 ÷ 0.500
	(Gs) Exhaust	0.310 ÷ 0.345
Nominal height	Intake	9.6
	Exhaust	6.4
Angular value of timing reference marks on caps	Right-hand head	15'
	Left-hand head	15'

ANGULAR VALUES OF ACTUAL TIMING DIAGRAM

Intake	Opening (before TDC)	(a) 31°26'
	Closing (after BDC)	(b) 73°26'
	Intake angular value	(c) 284°52'
Exhaust	Opening (before BDC)	(d) 67°04'
	Closing (after TDC)	(e) 30°04'
	Exhaust angular value	(f) 277°08'

1. Exhaust
2. intake
3. TDC
4. BDC

07 Engine