Engine Mechanical Specifications. Chevrolet Metro 1998

For 1990-2009 cars

Application | Specification
--- | ---
Metric | English
Camshaft

- Camshaft Intake Lobe Height (Standard)

36.171-36.331

1.4241-1.4303

- Camshaft Exhaust Lobe Height (Standard)

35.356-35.516

1.4314-1.4376

- Camshaft Intake Lobe Height (Minimum)

36.071

1.4202

- Camshaft Exhaust Lobe Height (Minimum)

36.256

1.4275

- Camshaft Runout (Maximum)

0.10

0.0039

- Camshaft Journal Clearance (Standard)

0.040-0.082

0.0016-0.0032

- Camshaft Journal Clearance Limit (Maximum)

0.12

0.0047

- Camshaft Journal Bore Diameter

28.000-28.021

1.1024-1.1031

- Camshaft Journal Outside Diameter

27.939-27.960

1.1000-1.1008

Crankshaft

- Crankshaft Runout

0.060

0.0023

- Crankshaft Thrust Play (Standard)

0.110-0.310

0.0044-0.0122

- Crankshaft Thrust Play (Maximum)

0.380

0.0149

- Crankshaft Out of Round

0.010

0.0004

- Crankshaft Taper

0.010

0.0004

- Crankshaft Journal Diameter 1 Stamping

44.994-45.000

1.7714-1.7716

- Crankshaft Journal Diameter 2 Stamping

44.988-44.994

1.7712-1.7714

- Crankshaft Journal Diameter 3 Stamping

44.982-44.988

1.7709-1.7712

- Crankshaft Journal Diameter for Reground Crankshaft

44.732-44.750

1.7611-1.7618

Connecting Rods and Bearings

- Connecting Rod Side Clearance (Standard)

0.10-0.20

0.0039-0.0078

- Connecting Rod Side Clearance (Maximum)

0.35

0.0137

- Connecting Rod Bow Limit

0.050

0.0020

- Connecting Rod Twist Limit

0.10

0.0039

- Connecting Rod Diameter Out-of-Round and Taper Limit

0.01

0.0004

- Connecting Rod Small End Diameter (Standard)

19.003-19.011

0.7482-0.7486

- Connecting Rod Big End Diameter (Standard)

41.982-42.000

1.6528-1.6535

- Connecting Rod Big End Diameter 0.25 mm (0.0098") Undersize

41.732-41.750

1.6430-1.6437

- Connecting Rod Bearing Clearance (Standard)

0.020-0.050

0.0008-0.0019

- Connecting Rod Bearing Clearance (Maximum)

0.080

0.0031

Main Bearings (Standard Replacement Bearings)

- Green

1.996-2.000

0.0786-0.0787

- Black

1.999-2.003

0.0787-0.0788

- Colorless (no paint)

2.002-2.006

0.0788-0.0789

- Yellow

2.005-2.009

0.0789-0.0790

- Blue

2.008-2.012

0.0790-0.0791

Main Bearings--Oversized Replacement Bearings (0.25 mm - 0.0098"):

- Green and Red

2.121-2.125

0.0835-0.0836

- Black and Red

2.124-2.128

0.0836-0.0837

- Red Only

2.127-2.131

0.0837-0.0838

- Yellow and Red

2.130-2.134

0.838-0.0839

- Blue and Red

2.133-2.137

0.0839-0.0840

- Main Bearing Clearance (Standard)

0.020-0.040

0.0008-0.0016

- Main Bearing Clearance (Maximum)

0.060

0.0023

- Main Bearing Cap Bore Diameter (Without Bearing) A Stamping

49.000-49.006

1.9291-1.9294

- Main Bearing Cap Bore Diameter (Without Bearing) B Stamping

49.006-49.012

1.9294-1.9496

- Main Bearing Cap Bore Diameter (Without Bearing) C Stamping

49.012-49.018

1.9296-1.9298

- Thrust Bearing Thickness (Standard)

2.500

0.0984

- Thrust Bearing Thickness (Maximum)

2.563

0.1009

Cylinder Head

- Cylinder Head Gasket Surface Distortion (Maximum)

0.05

0.002

- Cylinder Heat Seating Distortion Intake and Exhaust Manifolds (Maximum)

0.10

0.004

Cylinder Block

- Cylinder Block Gasket Surface Distortion (Standard)

0.03

0.0012

- Cylinder Block Gasket Surface Distortion (Maximum)

0.06

0.0024

- Cylinder Bore Stamped 1

74.01-74.02

2.9138-2.9141

- Cylinder Bore Stamped 2

74.00-74.01

2.9134-2.9138

- Cylinder Bore Diameter Limit

74.15

2.9196

- Taper and Out-of-Round Limits

0.10

0.0039

Oil Pump

- Oil Pump Rotor-to-Oil Pump Body Radial Clearance (Maximum)

0.310

0.0122

- Oil Pump Housing-to-Oil Pump Gear Set (Side Clearance) (Maximum)

0.15

0.0059

Pistons

- Piston-to-Cylinder Bore Clearance

0.02-0.04

0.0008-0.0015

- Piston Diameter Standard Stamp 1

73.980-79.990

2.9126-2.9130

- Piston Diameter Standard Stamp 2

73.970-73.980

2.912-2.9126

- Piston Diameter 0.25 mm (0.0098") Oversize Piston

74.220-74.230

2.9220-2.9224

- Piston Diameter 0.50 mm (0.0196") Oversize Piston

74.470-74.480

2.9319-2.9323

- Piston Ring End Gap Top Ring (Standard)

0.15-0.30

0.0059-0.0118

- Piston Ring End Gap Top Ring (Maximum)

0.7

0.0275

- Piston Ring End Gap Lower Ring (Standard)

0.2-0.35

0.0079-0.0137

- Piston Ring End Gap Lower Ring (Maximum)

0.7

0.0275

- Piston Ring End Gap Oil Ring (Standard)

0.2-0.6

0.0079-0.0236

- Piston Ring End Gap Oil Ring (Maximum)

1.7

0.0669

- Piston Ring Groove Clearance Upper Compression Ring

0.03-0.07

0.0012-0.0027

- Piston Ring Groove Clearance Lower Compression Ring

0.02-0.06

0.0008-0.0023

- Piston Pin Diameter

18.997-19.000

0.7479-0.7480

- Piston Pin to Connecting Rod Clearance (Standard)

0.003-0.016

0.0001-0.0006

- Piston Pin to Connecting Rod Clearance (Maximum)

0.050

0.0020

Rocker Arms

- Rocker Arm to Shaft Clearance (Standard)

0.001-0.036

0.0001-0.0014

- Rocker Arm to Shaft Clearance (Maximum)

0.09

0.0035

- Rocker Arm Inside Diameter

15.985-16.005

0.629-0.630

- Rocker Arm Shaft Runout Limit

0.20

0.008

- Rocker Arm Shaft Diameter

15.969-15.984

0.6287-0.629

Valves

- Valve Guide Inside Diameter

5.485-5.510

0.2159-0.2169

- Valve Head Thickness Intake Valves (Standard)

0.8-1.2

0.03-0.047

- Valve Head Thickness Intake Valves (Minimum)

0.6

0.024

- Valve Head Thickness Exhaust Valves (Standard)

0.8-1.2

0.03-0.047

- Valve Head Thickness Exhaust Valves (Minimum)

0.7

0.027

- Valve Seating Contact Width Intake and Exhaust

1.1-1.3

0.0433-0.0512

- Intake Valve Stem Outside Diameter

5.465-5.480

0.2152-0.2157

- Exhaust Valve Stem Outside Diameter

5.440-5.455

0.2142-0.2148

- Intake Valve Stem Radial Runout (Minimum)

0.14

0.005

- Exhaust Valve Stem Radial Runout (Minimum)

0.18

0.007

- Intake Valve Stem-to-Valve Guide Clearance (Standard)

0.005-0.045

0.0002-0.0018

- Intake Valve Stem-to-Valve Guide Clearance (Maximum)

0.070

0.0027

- Exhaust Valve Stem-to-Valve Guide Clearance (Standard)

0.030-0.070

0.0012-0.0027

- Exhaust Valve Stem-to-Valve Guide Clearance (Maximum)

0.090

0.0035

- Valve Spring Free Length (Standard)

36.83

1.4500

- Valve Spring Free Length (Minimum)

35.67

1.4043

- Valve Spring Preload (Standard)

10.7-12.5 kg at 31.5

23.6-27.5 lb. at 1.24

- Valve Spring Preload (Minimum)

9.3 kg at 31.5

20.5 lb. at 1.24

- Valve Spring Squareness Deviation (Maximum)

2.0

0.079