Crankshaft

Make

Alfa Romeo

Model

GTV / Spider GTV and Spider (916) Factory Service Manual

Year

1995–2000

Section

Technical features (T. Spark 16V) › Crankshaft

00 Technical data and maintenanceCrankshaft

Crankshaft

Unit: mm

Crank pin diameter "a"	Class A - Red	52.994 ÷ 53.000
	Class B - Blue	52.988 ÷ 52.994
	Class C - Yellow	52.982 ÷ 52.988
	Undersizing 0.127
Connecting rod pin diameter "b"	Class A - Red	50.799 ÷ 50.805
	Class B - Blue	50.793 ÷ 50.799
	Class C - Yellow	50.787 ÷ 50.793
	Undersizing 0.127
Central crank pin diameter "c"		26.575 ÷ 26.625
		Oversizing 0.254
Maximum taper of crank pin and connecting rod pins		0.0045
Maximum taper error between crank and connecting rod pins		0.03

Main half bearings

Unit: mm

Side main half bearing thickness "a"	Class A - Red	1.831 ÷ 1.837
	Class B - Blue	1.836 ÷ 1.844
	Class C - Yellow	1.843 ÷ 1.849
	Undersizing 0.127
Centre main half bearing thickness "a"	Class A - Red	1.826 ÷ 1.832
	Class B - Blue	1.831 ÷ 1.839
	Class C - Yellow	1.838 ÷ 1.844
	Undersizing 0.127
Clearance between pins pins and main half bearings	Lateral	0.019 ÷ 0.062
	Central	0.029 ÷ 0.072

Thrust half rings

Unit: mm

Thrust half ring thickness "a"	2.342 ÷ 2.358
	Oversizing 0.127
Crankshaft axial clearance	0.059 ÷ 0.221

02 Maintenance