GM Service Manual Online
For 1990-2009 cars only

Application

Specification

Metric

English

Camshaft

  • Lift - Intake

34.501 mm

1.3583 in

  • Lift - Exhaust

34.337 mm

1.3519 in

  • Bending

0.025 mm

0.00098 in

  • Journal Outer Diameter: No. 1

27.947-27.960 mm

1.1003-1.1008 in

  • Journal Outer Diameter: No. 2

27.947-27.960 mm

1.1003-1.1008 in

  • Journal Outer Diameter: No. 3

27.947-27.960 mm

1.1003-1.1008 in

  • Journal Outer Diameter: No. 4

27.947-27.960 mm

1.1003-1.1008 in

  • Journal Outer Diameter: No. 5

27.947-27.960 mm

1.1003-1.1008 in

  • Trust Clearance (End Play)

0.0020-0.060 mm

0.05-0.15 in

Cylinder Head

  • Journal Inner Diameter: No. 1

28.000-28.021 mm

1.1021-1.1032 in

  • Journal Inner Diameter: No. 2

28.000-28.021 mm

1.1021-1.1032 in

  • Journal Inner Diameter: No. 3

28.000-28.021 mm

1.1021-1.1032 in

  • Journal Inner Diameter: No. 4

28.000-28.021 mm

1.1021-1.1032 in

  • Journal Inner Diameter: No. 5

28.000-28.021 mm

1.1021-1.1032 in

  • Journal Clearance

0.04-0.074 mm

0.00157-0.00291 in

  • Height

129.9-130.1 mm

5.1142-5.1220 in

  • Surface Flatness Deformation

mm (in)

0.13 overall 0.05 in 100 (0.00511 overall 0.0020 in 3.9370)

  • Manifolds Surface Deformation

mm (in)

0.13 overall 0.05 in 100 (0.00511 overall 0.0020 in 3.9370)

Valve

  • Deviation

0.038 mm

0.0015 in

  • Seat Inner Diameter - Intake

27.000 mm

1.0630 in

  • Seat Inner Diameter - Exhaust

22.7 mm

0.8937 in

  • Face Diameter - Intake

28.47-28.73 mm

1.1209-1.1311 in

  • Face Diameter - Exhaust

24.27-24.53 mm

0.9555-0.9657 in

  • Inner Diameter - Intake

5.975-6.000 mm

0.2352-0.2362 in

  • Inner Diameter - Exhaust

5.975-6.000 mm

0.2352-0.2362 in

  • Valve Stem Outer Diameter - Intake

5.573-5.953 mm

0.2194-0.2344 in

  • Valve Stem Outer Diameter - Exhaust

5.905-5.925 mm

0.2325-0.2333 in

  • Valve Length - Intake

93.59-93.61 mm

3.6846-3.6854 in

  • Valve Length - Exhaust

93.59-93.61 mm

3.6846-3.6854 in

  • Valve Spring - Free Length

38.500 mm

1.5157 in

Cylinder

  • Diameter

83.000 mm

3.2677 in

  • Taper (Maximum)

0.05/100 mm

0.0020/3.9370 in

  • Out of Round

0.006 mm

0.00024 in

Piston

  • Diameter

83.000 mm

3.2677 in

  • Clearance

0.070-0.090 mm

0.0028-0.0035 in

Piston Ring

  • Groove Clearance - Top Ring

0.090 mm

0.0035 in

  • Groove Clearance - 2nd Ring

0.070-0.110 mm

0.0028-0.0043 in

  • Groove Clearance - Oil Ring

0.030-0.070 mm

0.0012-0.0028 in

  • End Gap - Top Ring

0.200-0.350 mm

0.0079-0.0138 in

  • End Gap - 2nd Ring

0.400-0.600 mm

0.0157-0.0236 in

  • End Gap - Oil Ring

0.200-0.400 mm

0.0079-0.0157 in

Piston Pin

  • Diameter

27.993-27.998 mm

1.1021-1.1023 in

  • Length

66.800-67.000 mm

2.6299-2.6378 in

  • Clearance

0.102-0.307 mm

0.0040-0.0121 in

Connecting Rod

  • Thrust Clearance (End Play)

0.1-0.35 mm

0.0039-0.0138 in

  • Width

29.900-27.950 mm

1.1772-1.1004 in

  • Diameter - Piston Pin

30.987-31.013 mm

1.2200-1.2210 in

  • Diameter - Crankshaft

53.000-53.018 mm

2.0866-2.0873 in

  • Journal Bearing Oil Clearance

0.024-0.042 mm

0.0009-0.0017 in

Crankshaft

  • Thrust Clearance (End Play)

0.09-0.32 mm

0.0039-0.0138 in

  • Main Journal Outer Diameter

60.002-60.020 mm

2.3623-2.3630 in

  • Rod Journal Outer Diameter

50.008-50.026 mm

1.9688-1.9695 in

  • Journal Bearing Oil Clearance

0.024-0.042 mm

0.00094-0.00165 in

Cylinder Block

  • Piston Protrusion Limit

0.194-0.542 mm

0.00764-0.02134 in

  • Head Surface Deformation

0.06 mm

0.00236 in

  • Flatness

0.1 mm

0.00394 in