GM Service Manual Online
For 1990-2009 cars only

Application

Specification

Metric

English

General

  • Engine Type

Water Cooled, 4-Stroke, SOHC Gasoline Engine

  • Displacement

3471 cc

212 cu in

  • RPO

L66

  • VIN

U

  • Cylinder Arrangement

60° V6 Transverse

  • Bore

89.0 mm

3.50 in

  • Stroke

93.0 mm

3.66 in

  • Compression Ratio

10.0:1

  • Engine Compression Test - Minimum

990 kPa

145 psi

  • Engine Compression Test - Maximum Variation

200 kPa

29 psi

  • Idle Speed

680-780 RPM

  • Firing Order

1-4-2-5-3-6

  • Spark Plug Gap - Production

1.0-1.1 mm

0.039-0.043 in

  • Spark Plug Gap - Service

1.3 mm

0.051 in

  • Ignition Timing

8-12 BTDC at 680-780 RPM

Block

  • Crankshaft Main Bearing Bore Diameter

77.0-77.024 mm

3.031-3.032 in

  • Cylinder Bore Diameter - Production

89.0-89.015 mm

3.5039-3.5045 in

  • Cylinder Bore Diameter - Service

89.065 mm

3.5065 in

  • Cylinder Bore Diameter - 0.25 mm (0.0098 in) Oversize Piston

89.25-89.265 mm

3.5138-3.5144 in

  • Cylinder Bore Taper - Service

0.05 mm

0.002 in

  • Cylinder Head Deck Surface Flatness - Production

0.07 mm

0.003 in

  • Cylinder Head Deck Surface Flatness - Service

0.1 mm

0.004 in

  • Cylinder Reboring Limit - Service

0.25 mm

0.01 in

  • Rear Housing-to-Oil Seal Clearance

0.5-0.8 mm

0.019-0.031 in

Camshaft

  • Camshaft-to-Cap Clearance - Production

0.05-0.2 mm

0.002-0.008 in

  • Camshaft-to-Cap Clearance - Service

0.2 mm

0.008 in

  • End Play - Production

0.05-0.20 mm

0.002-0.008 in

  • End Play - Service

0.2 mm

0.008 in

  • Journal Diameter

42.935-42.950 mm

1.690-1.691 in

  • Journal Out-of-Round - Maximum

0.03 mm

0.0012 in

  • Camshaft-to-Journal Clearance - Production

0.05-0.089 mm

0.002-0.0035 in

  • Camshaft-to-Journal Clearance - Service

0.15 mm

0.006 in

  • Lobe Height - Intake Primary

35.041 mm

1.3796 in

  • Lobe Height - Intake Mid

36.445 mm

1.4348 in

  • Lobe Height - Intake Secondary

35.284 mm

1.3891 in

  • Lobe Height - Exhaust

36.326 mm

1.4302 in

  • Lobe Lift - Intake Primary

5.041 mm

0.1984 in

  • Lobe Lift - Intake Mid

6.323 mm

0.2489 in

  • Lobe Lift - Intake Secondary

5.284 mm

0.2080 in

  • Lobe Lift - Exhaust

6.326 mm

0.2490 in

  • Runout - Production

0.03 mm

0.001 in

  • Runout - Service

0.04 mm

0.002 in

Cooling System

  • Thermostat Begins-to-Open Temperature

76-80°C

168-176°F

  • Thermostat Full Open Temperature

90°C

194°F

  • Water Pump Displacement - at 6,000 RPM Per Minute

176 liters

186 qts

Connecting Rod

  • Bearing Clearance - Production

0.02-0.044 mm

0.0008-0.0017 in

  • Bearing Clearance - Service

0.05 mm

0.002 in

  • Bore Diameter - Bearing End

58 mm

2.28 in

  • Bore Diameter - Pin End

21.97-21.976 mm

0.865-0.8652 in

  • Bore Out-of-Round - Bearing End

0.005 mm

0.0002 in

  • Length

158.5 mm

6.24 in

  • End Play - Production

0.15-0.35 mm

0.006-0.014 in

  • End Play - Service

0.45 mm

0.018 in

  • Connecting Rod Bolt - Difference in Diameter - Service

0.0-0.1 mm

0.0-0.004 in

Crankshaft

  • Connecting Rod Journal Diameter

54.976-55.0 mm

2.1644-2.1654 in

  • Connecting Rod Journal Out-of-Round - Production

0.005 mm

0.0002 in

  • Connecting Rod Journal Out-of-Round - Service

0.01 mm

0.0004 in

  • Connecting Rod Journal Taper - Production

0.005 mm

0.0002 in

  • Connecting Rod Journal Taper - Service

0.01 mm

0.0004 in

  • Connecting Rod Journal Width

17.55-17.75 mm

0.691-0.699 in

  • End Play - Production

0.1-0.35 mm

0.004-0.014 in

  • End Play - Service

0.45 mm

0.018 in

  • Main Bearing Clearance - Production

0.02-0.044 mm

0.0008-0.0017 in

  • Main Bearing Clearance - Service

0.05 mm

0.002 in

  • Main Journal Diameter

71.976-72.0 mm

2.8337-2.8346 in

  • Main Journal Out-of-Round - Production

0.005 mm

0.0002 in

  • Main Journal Out-of-Round - Service

0.01 mm

0.0004 in

  • Main Journal Taper - Production

0.005 mm

0.0002 in

  • Main Journal Taper - Service

0.01 mm

0.0004 in

  • Runout - Production - Journals 1 and 4

0.02 mm

0.0008 in

  • Runout - Production - Journals 2 and 3

0.025 mm

0.001 in

  • Runout - Service

0.03 mm

0.0012 in

  • Thrust Surface Distance

0.1-0.35 mm

0.004-0.014 in

  • Thrust Surface Runout

0.45 mm

0.018 in

Cylinder Head

  • Combustion Chamber Volume

51.3 cu cm

3.13 cu in

  • Cylinder Head Height/Thickness

120.95-121.05 mm

4.762-4.766 in

  • Surface Flatness - Block Deck

0.05 mm

0.002 in

  • Surface Flatness - Exhaust Manifold Deck

0.05 mm

0.002 in

  • Surface Flatness - Intake Manifold Deck

0.05 mm

0.002 in

  • Resurface Limit - Block Deck

0.2 mm

0.008 in

  • Valve Guide Bore - Exhaust - Production

5.515-5.53 mm

0.2171-0.2178 in

  • Valve Guide Bore - Exhaust - Service

5.55 mm

0.219 in

  • Valve Guide Bore - Intake - Production

5.515-5.530 mm

0.2171-0.2177 in

  • Valve Guide Bore - Intake - Service

5.55 mm

0.219 in

  • Valve Guide Installed Height - Exhaust

20.63-21.63 mm

0.812-0.852 in

  • Valve Guide Installed Height - Intake

21.2-22.2 mm

0.835-0.874 in

Lubrication System

  • Oil Type

5W-20

  • Oil Capacity - with Engine Overhaul

5.0 liters

5.2 qts

  • Oil Capacity - with Filter

4.3 liters

4.5 qts

  • Oil Capacity - without Filter

4.0 liters

4.2 qts

  • Oil Pressure - at Idle and Engine at 80°C (176°F)

70 kPa

10 psi

  • Oil Pressure - at 3,000 RPM and Engine at 80°C (176°F)

490 kPa

71 psi

Oil Pump

  • Displacement - at 6,000 RPM Per Minute

58.4 liters

61.7 qts

  • Rotor Diameter - Outer

84 mm

3.307 in

  • Rotor Pocket - Depth - Inner

12.72 mm

0.5 in

  • Rotor Pocket - Depth - Outer

12.78 mm

0.503 in

  • Inner Rotor-to-Outer Rotor Radial Clearance - New

0.04-0.16 mm

0.002-0.0063 in

  • Inner Rotor-to-Outer Rotor Radial Clearance - Service Limit

0.2 mm

0.008 in

  • Housing-to-Rotor Axial Clearance - New

0.02-0.07 mm

0.001-0.003 in

  • Housing-to-Rotor Axial Clearance - Service Limit

0.12 mm

0.005 in

  • Housing-to-Outer Rotor Radial Clearance - New

0.10-0.19 mm

0.004-0.007 in

  • Housing-to-Outer Rotor Radial Clearance - Service Limit

0.2 mm

0.008 in

Piston Rings

  • End Gap - Top - Production

0.2-0.35 mm

0.008-0.014 in

  • End Gap - Top - Service

0.6 mm

0.024 in

  • End Gap - Second - Production

0.4-0.55 mm

0.0016-0.022 in

  • End Gap - Second - Service

0.7 mm

0.028 in

  • End Gap - Oil - Production

0.2-0.7 mm

0.008-0.028 in

  • End Gap - Oil - Service

0.8 mm

0.031 in

  • First Compression Ring - Production

0.02-0.35 mm

0.008-0.014 in

  • First Compression Ring - Service

0.6 mm

0.024 in

  • Second Compression Ring - Production

0.4-0.055 mm

0.0016-0.0022 in

  • Second Compression Ring - Service

0.7 mm

0.028 in

  • Oil Control Ring - Production

0.2-0.7 mm

0.008-0.028 in

  • Oil Control Ring - Service

0.8 mm

0.031 in

  • Piston Ring-to-Groove Clearance - Top - Production

0.055-0.08 mm

0.0022-0.0031 in

  • Piston Ring-to-Groove Clearance - Top - Service

0.15 mm

0.006 in

  • Piston Ring-to-Groove Clearance - Second - Production

0.03-0.055 mm

0.0012-0.0022 in

  • Piston Ring-to-Groove Clearance - Second - Service

0.13 mm

0.005 in

  • First Compression Ring - Production

0.055-0.08 mm

0.0022-0.0031 in

  • First Compression Ring - Service

0.13 mm

0.005 in

  • Second Compression Ring - Production

0.03-0.055 mm

0.0012-0.0022 in

  • Second Compression Ring - Service

0.13 mm

0.005 in

  • First Compression Ring Height

1.2 mm

0.05 in

  • First Compression Width

3.1 mm

0.12 in

  • Second Compression Height

1.2 mm

0.05 in

  • Second Compression Width

3.4 mm

0.13 in

Pistons

  • Diameter - Production - Measure 16 mm (0.63 in) from Bottom of Skirt

88.975-88.985 mm

3.5029-3.5033 in

  • Diameter - Service

88.965 mm

3.5026 in

  • Diameter - 0.25 mm Oversize Piston

89.225-89.235 mm

3.5128-3.5132 in

  • Out-of-Round - Measured by Clearance to Cylinder Bore

0.08 mm

3.15 in

  • Pin Bore Diameter

21.96-22.03 mm

0.864-0.867 in

  • Ring Groove Width - Top - Production

1.24-1.25 mm

0.0488-0.0492 in

  • Ring Groove Width - Top - Service

1.27 mm

0.05 in

  • Ring Groove Width - Second - Production

1.22-1.23 mm

0.048-0.0484 in

  • Ring Groove Width - Second - Service

1.25 mm

0.049 in

  • Ring Groove Width - Oil - Production

2.805-2.825 mm

0.1104-0.1112 in

  • Ring Groove Width - Oil - Service

2.85 mm

0.112 in

  • Piston to Bore Clearance - Production

0.015-0.04 mm

0.0006-0.0016 in

  • Piston to Bore Clearance - Service

0.08 mm

0.003 in

Piston Pin

  • Clearance to Connecting Rod Bore - Production

0.005-0.014 mm

0.0002-0.0006 in

  • Clearance to Connecting Rod Bore - Service

0.019 mm

0.0007 in

  • Clearance to Piston Pin Bore - Production

-0.005 to +0.001 mm

-0.0002 to +0.00004 in

  • Clearance to Piston Pin Bore - Service

0.004 mm

0.0002 in

  • Diameter - Production

21.962-21.965 mm

0.8646-0.8648 in

  • Diameter - Service

21.954 mm

0.8643 in

  • Length

53.77-54.23 mm

2.116-2.135 in

Starter

  • Rated Output

1.6 kW

2.15 hp

Timing Belt Tensioner

  • Tensioner Rod Extended

48.8-58.7 mm

1.92-2.31 in

  • Tensioner Spring Load - Rod Extended

151 N at 58.7 mm

34 lb at 2.31 in

  • Tensioner Spring Load - Rod Partially Extended

185 N at 54.4 mm

41.5 lb at 2.14 in

  • Tensioner Spring Load - Rod Retracted

228 N at 48.8 mm

51 lb at 1.92 in

Valves and Valve Seats

  • Clearance - Cold - Exhaust

0.28-0.32 mm

0.011-0.013 in

  • Clearance - Cold - Intake

0.20-0.24 mm

0.008-0.009 in

  • Face Angle - Exhaust

40-60 degrees

  • Face Angle - Intake

45-60-70 degrees

  • Face Runout - Maximum

0.04 mm

0.0016 in

  • Face Width

2.121 mm

0.083 in

  • Head Diameter - Exhaust

29.9-30.1 mm

1.177-1.185 in

  • Head Diameter - Intake

34.9-35.1 mm

1.374-1.382 in

  • Key Groove Diameter

4.595-4.60 mm

0.180-0.181 in

  • Length - Exhaust

113.9-114.5 mm

4.484-4.508 in

  • Length - Intake

115.7-116.3 mm

4.555-4.579 in

  • Seat Angle - Exhaust

30-45-60 degrees

  • Seat Angle - Intake

30-45-67 degrees

  • Seat Width - Exhaust - Production

1.25-1.55 mm

0.049-0.061 in

  • Seat Width - Exhaust - Service

2.0 mm

0.079 in

  • Seat Width - Intake - Production

1.25-1.55 mm

0.049-0.061 mm

  • Seat Width - Intake - Service

2.0 mm

0.079 in

  • Stem Diameter - Exhaust - Production

5.45-5.46 mm

0.2146-0.215 in

  • Stem Diameter - Exhaust - Service

5.42 mm

0.2134 in

  • Stem Diameter - Intake - Production

5.485-5.495 mm

0.2159-0.2163 in

  • Stem Diameter - Intake - Service

5.455 mm

0.2148 in

  • Stem Installed Height - Exhaust - Production

46.68-47.48 mm

1.838-1.869 in

  • Stem Installed Height - Exhaust - Service

47.73 mm

1.879 in

  • Stem Installed Height - Intake - Production

46.75-47.55 mm

1.841-1.872 in

  • Stem Installed Height - Intake - Service

47.8 mm

1.882 in

  • Stem-to-Guide Clearance - Exhaust - Production

0.055-0.08 mm

0.0022-0.0031 in

  • Stem-to-Guide Clearance - Exhaust - Service

0.11 mm

0.004 in

  • Stem-to-Guide Clearance - Intake - Production

0.02-0.045 mm

0.0008-0.0018 in

  • Stem-to-Guide Clearance - Intake - Service

0.08 mm

0.003 in

Valve Guides

  • Valve Guide Installed Height - Intake

21.20-22.2 mm

0.835-0.874 in

  • Valve Guide Installed Height - Exhaust

20.63-21.63 mm

0.812-0.852 in

Valve Lash Adjuster

  • Free Length

47.41 mm

1.87 in

  • Spring Load

49 N at 45.5 mm

11 lb at 1.79 in

Rocker Arms and Shafts

  • Bore Diameter

20.02-20.05 mm

0.788-0.789 in

  • Arm-to-Shaft Clearance - Exhaust - Production

0.026-0.077 mm

0.001-0.003 in

  • Arm-to-Shaft Clearance - Exhaust - Service

0.077 mm

0.003 in

  • Arm-to-Shaft Clearance - Intake - Production

0.026-0.067 mm

0.001-0.0026 in

  • Arm-to-Shaft Clearance - Intake - Service

0.067 mm

0.0026 in

  • Ratio

1.5:1

  • Shaft Diameter

20.0 mm

0.7874 in

  • Intake Rocker Arm Test - Regulator Pressure Setting

440-540 kPa

64-78 psi

Valve Springs

  • Coil Thickness - Exhaust

3.5 mm

0.137 in

  • Coil Thickness - Intake

3.6 mm

0.141 in

  • Diameter - Inside

16.2 mm

0.637 in

  • Diameter - Outside - Exhaust

23.2 mm

0.913 in

  • Diameter - Outside - Intake

23.4 mm

0.921 in

  • Free Length - Exhaust

51.06 mm

2.01 in

  • Free Length - Intake

51.54 mm

2.029 in

  • Installed Height

43.4 mm

1.708 in