GM Service Manual Online
For 1990-2009 cars only

Application

Specification

Metric

English

General Data

  • Engine Type

60 degree V-6

  • Displacement

3.4L

204 cu in

  • RPO

LNJ

  • VIN

F

  • Bore

92 mm

3.62 in

  • Stroke

84 mm

3.31 in

  • Compression Ratio

9.6:1

  • Firing Order

1-2-3-4-5-6

  • Spark Plug Gap

1.52 mm

0.60 in

Block

  • Camshaft Bearing Bore Diameter - Front and Rear

51.03-51.08 mm

2.009-2.011 in

  • Camshaft Bearing Bore Diameter - Middle #2, #3

50.77-50.82 mm

1.999-2.001 in

  • Crankshaft Main Bearing Bore Diameter

72.1535-72.0695 mm

2.840-2.841 in

  • Crankshaft Main Bearing Bore Out-of-Round

0.008 mm

0.00031 in

  • Cylinder Bore Diameter - Production

92.020-92.038 mm

3.622-3.623 in

  • Cylinder Bore Diameter - Service

92.020-92.038 mm

3.622-3.623 in

  • Cylinder Bore Out-of-Round - Diametral - Production

0.020 mm

0.0008 in

  • Cylinder Bore Out-of-Round - Diametral - Service

0.025 mm

0.001 in

  • Cylinder Bore Taper - Production

0.020 mm

0.0008 in

  • Cylinder Bore Taper - Service

0.025 mm

0.001 in

  • Cylinder Head Deck Height

224 mm

8.818 in

  • Cylinder Head Deck Surface Flatness

0.05 mm per 152 mm

0.0019 in per 6 in

  • Valve Lifter Bore Diameter

21.417-21.455 mm

0.843-0.844 in

Camshaft

  • Camshaft Bearing Inside Diameter

47.523-47.549 mm

1.871-1.872 in

  • Camshaft Journal Diameter

47.45-47.48 mm

1.868-1.869 in

  • Camshaft Journal Out-of-Round

0.025 mm

0.001 in

  • Camshaft Lobe Lift - Exhaust

6.9263 mm

0.2727 in

  • Camshaft Lobe Lift - Intake

6.9263 mm

0.2727 in

Cooling System

  • Thermostat Full Open Temperature

91° C

195° F

Connecting Rod

  • Connecting Rod Bearing Clearance

0.18-0.062 mm

0.0007-0.017 in

  • Connecting Rod Bore Diameter

53.962-53.978 mm

2.124-2.125 in

  • Connecting Rod Bore Out-of-Round

0.008 mm

0.0002 in

  • Connecting Rod Length - Center to Center

144.75-144.81 mm

5.69-5.70 in

  • Connecting Rod Side Clearance

0.25-0.37 mm

0.010-0.015 in

Crankshaft

  • Connecting Rod Journal Diameter

50.768-50.784 mm

1.9987-1.9994 in

  • Connecting Rod Journal Out-of-Round

0.005 mm

0.0002 in

  • Connecting Rod Journal Taper

0.005 mm

0.0002 in

  • Connecting Rod Journal Width

21.92-22.08 mm

0.863-0.869 in

  • Crankshaft End Play

0.060-0.210 mm

0.0024-0.0083 in

  • Crankshaft Main Bearing Journal Width

23.9-24.1 mm

0.941-0.949 in

  • Crankshaft Main Bearing Clearance - Except #3

0.019-0.064 mm

0.0008-0.0025 in

  • Crankshaft Main Bearing Clearance - #3 Thrust Bearing

0.032-0.077 mm

0.0012-0.0030 in

  • Crankshaft Main Journal Diameter

67.239-67.257 mm

2.6473-2.6483 in

  • Crankshaft Main Journal Out-of-Round

0.005 mm

0.0002 in

  • Crankshaft Main Journal Taper

0.005 mm

0.0002 in

  • Crankshaft Rear Flange Runout

0.04 mm

0.0016 in

Cylinder Head

  • Combustion Chamber Depth - at Measurement Point

2.2 mm

0.087 in

  • Surface Finish - Maximum

2.8 Ra

  • Surface Flatness - Block Deck

0.08 mm per 152 mm

0.003 in per 6 in

  • Surface Flatness - Exhaust Manifold Deck

0.1 mm

0.004 in

  • Surface Flatness - Intake Manifold Deck

0.1 mm

0.004 in

  • Valve Guide Bore - Exhaust

8.01 mm

0.315 in

  • Valve Guide Bore - Intake

8.01 mm

0.315 in

  • Valve Guide Installed Height

16.6 mm

0.654 in

Lubrication System

  • Oil Capacity - with Filter

4.3 liters

4.5 quarts

  • Oil Pressure - @ 1850 RPM

207-241 kPa

30-35 psi

Oil Pump

  • Gear Diameter

38.05-38.10 mm

1.498-1.500 in

  • Gear Pocket - Depth

30.52-30.58 mm

1.202-1.204 in

  • Gear Pocket - Diameter

38.176-38.226 mm

1.503-1.505 in

  • Gears Lash

0.094-0.195 mm

0.0037-0.0077 mm

  • Relief Valve-to-Bore Clearance

0.038-0.089 mm

0.0015-0.0035 in

Piston Ring End Gap

  • First Compression Ring

0.15-0.36 mm

0.006-0.014 in

  • Second Compression Ring

0.48-0.74 mm

0.0188-0.0291 in

  • Oil Control Ring

0.25-0.77 mm

0.0098-0.0303 in

Piston Ring to Groove Clearance

  • First Compression Ring

0.04-0.086 mm

0.002-0.0033 in

  • Second Compression Ring

0.04-0.08 mm

0.002-0.0031 in

  • Oil Control Ring

0.07-0.095 mm

0.0028-0.0037 in

Piston Ring Thickness

  • First Compression Ring

1.164-1.190 mm

0.046-0.047 in

  • Second Compression Ring

1.460-1.490 mm

0.0574-0.0586 in

  • Oil Control Ring - Maximum

2.960 mm

0.116 in

Piston

  • Piston Diameter - Production - Cylinder 1-4

91.985-92.003 mm

3.621-3.622 in

  • Piston Diameter - Service Limit - Cylinder 1-4

91.945 mm

3.619 in

  • Piston Diameter - Production - Cylinder 5-6

91.99-92.028 mm

3.621-3.623 in

  • Piston Diameter - Service Limit - Cylinder 5-6

91.945 mm

3.619 in

  • Piston Pin Bore Diameter

23.005-23.010 mm

0.9057-0.9059 in

  • Piston Ring Groove Width - First

1.23-1.25 mm

0.048-0.049 in

  • Piston Ring Groove Width - Second

1.53-1.55 mm

0.060-0.061 in

  • Piston Ring Groove Width - Oil Control

3.03-3.055 mm

0.119-0.120 in

  • Piston to Bore Clearance - Production - 1-4

0.17-0.053 mm

0.0006-0.0020 in

  • Piston to Bore Clearance - Service Limit- 1-4

0.093 mm

0.0036 in

  • Piston to Bore Clearance - Production - 5-6

-0.008-+0.048 mm

-0.0003-+0.0018 in

  • Piston to Bore Clearance - Service Limit- 5-6

0.093 mm

0.0036 in

Pin

  • Piston Pin Clearance to Connecting Rod Bore - Press Fit

-0.047 to -0.019 mm

-0.0019 to -0.0007 in

  • Piston Pin Clearance to Piston Pin Bore

0.008-0.016 mm

0.00031-0.00063 in

  • Piston Pin Diameter

22.994-22.997 mm

0.9053-0.9054 in

Valves

  • Valve Face Angle

45 degrees

  • Valve Seat Angle

46 degrees

  • Valve Seat Depth - Intake - from Deck Face

7.9-8.1 mm

0.311-0.318 in

  • Valve Seat Depth - Exhaust - from Deck Face

8.9-9.1 mm

0.350-0.358 in

  • Valve Seat Runout

0.037 mm

0.0015 in

  • Valve Seat Width - Intake

1.55-1.80 mm

0.061-0.071 in

  • Valve Seat Width - Exhaust

1.70-2.0 mm

0.067-0.079 in

  • Valve Stem-to-Guide Clearance

0.026-0.068 mm

0.0010-0.0027 in

Valve Lifters/Push Rods

  • Push Rod Length - Intake

146.0 mm

5.75 in

  • Push Rod Length - Exhaust

152.5 mm

6.0 in

Valve Springs

  • Valve Spring Free Length

48.5 mm

1.89 in

  • Valve Spring Installed Height

43.2 mm

1.701 in

  • Valve Spring Load - Closed

320 N @ 43.2 mm

75 lb @ 1.701 in

  • Valve Spring Load - Open

1036 N @ 32 mm

230 lb @ 1.260 in

  • Valve Spring Total Number of Coils

6.55