GM Service Manual Online
For 1990-2009 cars only

Application

Specification

Metric

English

Camshaft

  • Lift - Intake

46.3 mm

1.8228 in

  • Lift - Exhaust

45.3 mm

1.7835 in

  • Bending

0.04 mm

0.0016 in

  • Journal Outer Diameter : No. 1

27.939-27.960 mm

1.1000-1.1008 in

  • Journal Outer Diameter : No. 2

27.939-27.960 mm

1.1000-1.1008 in

  • Journal Outer Diameter : No. 3

27.939-27.960 mm

1.1000-1.1008 in

  • Journal Outer Diameter : No. 4

27.939-27.960 mm

1.1000-1.1008 in

  • Journal Outer Diameter : No. 5

27.939-27.960 mm

1.1000-1.1008 in

  • Trust Clearance (End Play)

0.13-0.215 mm

0.0051-0.0085 in

Connecting Rod

  • Thrust Clearance - End Play

0.07-0.242 mm

0.0028-0.0095 in

  • Width

21.838-21.890 mm

0.8598-0.8618 in

  • Diameter - Piston Pin

19.012-19.020 mm

0.7485-0.7488 in

  • Diameter - Crankshaft

45.999-46.013 mm

1.8110-1.8115 in

  • Bending

0.04 mm

0.0016 in

  • Twist

0.016 mm

0.0006 in

  • Journal Bearing Oil Clearance

0.018-0.064 mm

0.0007-0.0025 in

Crankshaft

  • Thrust Clearance - End Play

0.1-0.202 mm

0.0039-0.0080 in

  • Journal Outer Diameter

Main: 54.980-54.997 mm

Pin: 42.971-42.987 mm

Main: 2.1646-2.1652 in

Pin: 1.6918-1.6924 in

  • Journal Bearing Oil Clearance

Main: 0.0155-0.047 mm

Pin: 0.019-0.067 mm

Main: 0.0006-0.0019 in

Pin: 0.0007-0.0026 in

  • Bending

0.03 mm

0.0012 in

Cylinder Block

  • Diameter

79 mm

3.1102 in

  • Deck Surface Flatness

0.025/65 mm

0.0010/2.5591 in

  • Cylindricity

0.0065 mm

0.0003 in

Cylinder Head

  • Journal Inner Diameter: No. 1

28.000-28.021 mm

1.1024-1.1032 in

  • Journal Inner Diameter: No. 2

28.000-28.021 mm

1.1024-1.1032 in

  • Journal Inner Diameter: No. 3

28.000-28.021 mm

1.1024-1.1032 in

  • Journal Inner Diameter: No. 4

28.000-28.021 mm

1.1024-1.1032 in

  • Journal Inner Diameter: No. 5

28.000-28.021 mm

1.1024-1.1032 in

  • Journal Clearance

0.04-0.082 mm

0.0016-0.0032 in

  • Height

135.55 mm

5.3366 in

  • Surface Flatness Deformation Cover/Block

0.02/50-0.025/150 mm

0.0008/1.9685-0.0010/5.9055 in

  • Manifolds Surface Deformation

0.05 mm

0.002 in

Valve

  • Deviation

0.3 mm

0.0118 in

  • Seat Inner Diameter - Intake

30.7 mm

1.2087 in

  • Seat Inner Diameter - Exhaust

27.2 mm

1.0709 in

  • Face Diameter - Intake

30.92-31.12 mm

1.2173-1.2252 in

  • Face Diameter - Exhaust

27.4-27.6 mm

1.0787-1.0866 in

  • Guide Inner Diameter - Intake

5.0-5.016 mm

0.1969-0.1975 in

  • Guide Inner Diameter - Exhaust

5.0-5.016 mm

0.1969-0.1975 in

  • Valve Stem Outer Diameter - Intake

4.965-4.980 mm

0.1955-0.1961 in

  • Valve Stem Outer Diameter - Exhaust

4.950-4.965 mm

0.1945-0.1955 in

  • Valve Length - Intake

117.10-117.30 mm

4.6102-4.6181 in

  • Valve Length - Exhaust

116.16-116.36 mm

4.5732-4.5811 in

  • Valve Spring - Free Length

41.6 mm

1.6378 in

  • Valve Spring - Straightness

1.5°

1.5°

  • Clearance - Intake

0.21-0.29 mm (Nominal 0.25 mm)

0.0083-0.0114 in (Nominal 0.0098 in)

  • Clearance - Exhaust

0.27-0.35 mm (Nominal 0.25 mm)

0.0106-0.0138 in (Nominal 0.0098 in)

Oil Pump Axial Clearance

0.02-0.058 mm

0.0008-0.0023 in

Piston

  • Piston

79 mm

3.1102 in

  • Diameter

0.030-0.060 mm

0.0012-0.0024 in

Piston Ring

  • Groove Clearance - Top Ring

0.04-0.08 mm

0.0016-0.0031 in

  • Groove Clearance - 2nd Ring

0.03-0.07 mm

0.0012-0.0028 in

  • Groove Clearance - Oil Ring

0.06-0.15 mm

0.0024-0.0059 in

  • End Gap - Top Ring

0.15-0.30 mm

0.0059-0.0118 in

  • End Gap - 2nd Ring

0.30-0.50 mm

0.0118-0.0197 in

  • End Gap - Oil Ring

0.20-0.70 mm

0.0079-0.0276 in

Piston Pin

  • Diameter

19.000-19.005 mm

0.7480-0.7482 in

  • Length

49.84 mm

1.9268 in

  • Clearance

0.007-0.020 mm

0.0003-0.0008 in