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Engine Mechanical Unit Repair: Specifications

IMPORTANT: See TSB For Revised Lower Intake Torque
FASTENER TIGHTENING SPECIFICATIONS

Application Specification
Metric English
Accelerator Control Cable Bracket Bolt/Nut 10 N.m 89 lb in
Air Injection Check Valve - with NC1 California Emissions 20 N.m 15 lb ft
Air Injection Check Valve Front Bracket Bolt/Nut - with NC1 California Emissions 25 N.m 18 lb ft
Air Injection Check Valve Bolt/Nut - with NC1 California Emissions 10 N.m 89 lb in
Air Injection Check Valve Pipe Adapter - with NC1 California Emissions 30 N.m 22 lb ft
Air Injection Check Valve Pipe Assembly Bolt 10 N.m 89 lb in
Air Injection Check Valve Rear Bracket Bolt/Nut - with NC1 California Emissions 25 N.m 18 lb ft
Air Injection Solenoid Bolt - with NC1 California Emissions 10 N.m 89 lb in
Camshaft Position Sensor Bolt 10 N.m 89 lb in
Camshaft Sprocket Bolt 140 N.m 103 lb ft
Camshaft Thrust Plate Screw 10 N.m 89 lb in
Connecting Rod Bearing Cap Nut
First Pass 20 N.m 15 lb ft
Final Pass 75 degrees
Coolant Drain Plug 19 N.m 14 lb ft
Coolant Temperature Sensor 23 N.m 17 lb ft
Crankshaft Balancer Bolt
First Pass 70 N.m 52 lb ft
Final Pass 72 degrees
Crankshaft Main Bearing Cap Bolt/Stud
First Pass 50 N.m 37 lb ft
Final Pass 77 degrees
Crankshaft Oil Deflector Nut 25 N.m 18 lb ft
Crankshaft Position Sensor Bolt - Front Cover 10 N.m 89 lb in
Crankshaft Position Sensor Stud - Side of Engine Block 11 N.m 98 lb in
Crankshaft Position Sensor Shield Nut 11 N.m 98 lb in
Crankshaft Position Sensor Wiring Bracket Bolt 40 N.m 30 lb ft
Cylinder Head Bolt (NEW Bolts)
First Pass 60 N.m 44 lb ft
Final Pass 95 degrees
Drive Belt Tensioner Bolt 50 N.m 37 lb ft
EGR Valve Adapter Pipe to Exhaust Manifold Nut 25 N.m 18 lb ft
EGR Valve Pipe to EGR Valve Bolt 25 N.m 18 lb ft
Engine Front Cover Bolt
Large Bolt 55 N.m 41 lb ft
Medium Bolt 55 N.m 41 lb ft
Small Bolt 27 N.m 20 lb ft
Engine Mount Strut and A/C Compressor Bracket Bolt 50 N.m 37 lb ft
Engine Mount Strut and Lift Bracket Bolt - Engine Lift Rear 70 N.m 52 lb ft
Engine Mount Strut and Generator Bracket Bolt 50 N.m 37 lb ft
Engine Mount Strut and Support Bracket
Large Bolt 55 N.m 41 lb ft
Medium Bolt 55 N.m 41 lb ft
Small Bolt 27 N.m 20 lb ft
Engine Oil Pressure Indicator Switch 16 N.m 115 lb in
Engine Wiring Harness Bracket Bolt 13 N.m 115 lb in
Exhaust Manifold Heat Shield Bolt 10 N.m 89 lb in
Exhaust Manifold Nut 16 N.m 12 lb ft
Exhaust Manifold Stud 18 N.m 13 lb ft
Flywheel Bolt 71 N.m 52 lb ft
Fuel Feed and Return Pipe Bracket Stud 50 N.m 37 lb ft
Fuel Feed and Return Pipe Retaining Clip Bolt 8 N.m 71 lb in
Fuel Feed and Return Pipe Retaining Clip Nut 25 N.m 18 lb ft
Fuel Feed Pipe To Fuel Injector Rail Nut 17 N.m 13 lb ft
Fuel Injector Rail Bolt 10 N.m 89 lb in
Fuel Pipe Clip Bolt 8 N.m 71 lb in
Heated Oxygen Sensor 42 N.m 31 lb ft
Heater Inlet Pipe Nut 25 N.m 18 lb ft
Heater Inlet Pipe Stud 50 N.m 37 lb ft
Ignition Coil Bracket Bolt/Nut/Stud 25 N.m 18 lb ft
Intake Manifold Coolant Pipe Bolt 10 N.m 89 lb in
Knock Sensor 19 N.m 14 lb ft
Lower Intake Manifold Bolt
First Pass (Virtical Bolts) 7 N.m 62 lb in
First Pass (Diagonal Bolts) 7 N.m 62 lb in
Final Pass (Virtical Bolts) 13 N.m 115 lb in
Final Pass (Diagonal Bolts) 25 N.m 18 lb ft
MAP Sensor Bolt 5 N.m 44 lb in
MAP Sensor Bracket Bolt 25 N.m 18 lb ft
Oil Cooler Connector 50 N.m 37 lb ft
Oil Cooler Hose Fitting 19 N.m 14 lb ft
Oil Cooler Pipe Bracket Bolt 10 N.m 89 lb in
Oil Filter 30 N.m 22 lb ft
Oil Filter Bypass Hole Plug 19 N.m 14 lb ft
Oil Filter Fitting 39 N.m 29 lb ft
Oil Gallery Plug - 1/4 inch 19 N.m 14 lb ft
Oil Gallery Plug - 3/8 inch 33 N.m 24 lb ft
Oil Level Indicator Tube Bolt 25 N.m 18 lb ft
Oil Level Sensor Bolt 10 N.m 89 lb in
Oil Pan Bolt 25 N.m 18 lb ft
Oil Pan Drain Plug 25 N.m 18 lb ft
Oil Pan Side Bolt 50 N.m 37 lb ft
Oil Pump Cover Bolt 10 N.m 89 lb in
Oil Pump Drive Clamp Bolt 36 N.m 27 lb ft
Oil Pump Mounting Bolt 41 N.m 30 lb ft
Spark Plug - Initial Installation 27 N.m 20 lb ft
Spark Plug - After Initial Installation 15 N.m 13 lb ft
Thermostat Bypass Pipe to Engine Front Cover Bolt 12 N.m 106 lb in
Thermostat Bypass Pipe to Throttle Body Nut 25 N.m 18 lb ft
Throttle Body Bolt/Stud 25 N.m 18 lb ft
Timing Chain Dampener Bolt 21 N.m 15 lb ft
Upper Intake Manifold Bolt/Stud 25 N.m 18 lb ft
Valve Lifter Guide Bolt 10 N.m 89 lb in
Valve Rocker Arm Bolt
First Pass 19 N.m 14 lb ft
Final Pass 30 degrees
Valve Rocker Arm Cover Bolt 10 N.m 89 lb in
Water Outlet Bolt 25 N.m 18 lb ft
Water Pump Bolt 11 N.m 98 lb in
Water Pump Pulley Bolt 25 N.m 18 lb ft
Engine Mechanical Specifications (3 Of 3)

Application Specification
Metric English
Valve Spring
  Valve Springs Free Length 48.5 mm 1.89 in
  Valve Springs Load - Closed 320 N @ 43.2 mm 75 lb @ 1.701 in
  Valve Springs Load - Open 1036 N @ 32 mm 230 lb @ 1.260 in
  Installed Height Intake-Exhaust 43.2 mm 1.701 in
  Approximate number of coils 6.55
Oil Pump
  Gear Lash 0.094-0.195 mm 0.0037-0.0077 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
Oil Pump Gear
  Length 30.45-30.48 mm 1.199-1.200 in
  Diameter 38.05-38.10 mm 1.498-1.500 in
  Side Clearance 0.038-0.088 mm 0.001-0.003 in
  End Clearance 0.040-0.125 mm 0.002-0.005 in
  Valve to Bore Clearance 0.038-0.089 mm 0.0015-0.0035 in
ENGINE MECHANICAL SPECIFICATIONS

Application Specification
Metric English
General Data
  Engine Type 60 degree V-6
  Displacement 3.4L 204 cu in
  RPO - VIN Code LA1 (E)
  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
  Oil Pressure - Warm 103 kPa 15 psi @ 1100 RPM
Cylinder Bore
  Diameter 92.019-92.037 mm 3.6228-3.6235 in
  Out Of Round Maximum 0.009 mm 0.00035 in
  Taper - Thrust Side Maximum 0.010 mm 0.0004 in
Piston - non-coated
  Diameter-Gaged on the skirt 50 mm (0.02 in) from the top of piston - production 91.985-92.003 mm 3 6215-3 222 in
  Diameter-Gaged on the skirt 50 mm (0.02 in) from the top of piston - service limit 9.955-91.973 mm 3.620-3.621 in
  Clearance - production 0.016-0.052 mm 0.0006-0.0020 in
  Clearance - service limit 0.047-0.083 mm 0.0019-0.0033 in
  Pin Bore 23.005-23.010 mm 0.9057-0.9059 in
Piston - Grafal coated
  Diameter-Gaged on the skirt 50 mm (0.02 in) from the top of piston - production 91.990-92.028 mm 3.6217-3.6232 in
  Diameter-Gaged on the skirt 50 mm (0.02 in) from the top of piston - service limit 94.950-988 mm 3.6201-3.6216 in
  Clearance - production 0.008-0.048 mm 0.00031-0.0019 in
  Clearance - service limit 0.032-0.088 mm 0.0013-0.0035 in
  Pin Bore 23.005-23.010 mm 0.9057-0.9059 in
Piston Ring
  Top Groove Side Clearance 0.04-0.086 mm 0.002-0.0034 in
  Second Groove Side Clearance 0.04-0.09 mm 0.002-0.0035 in
  Top Ring Gap 0.21-0.48 mm 0.008-0.019 in
  Second Ring Gap 0.54-0.86 Mm 0.0213-0.0339 In
  Oil Ring Groove Clearance 0.46-0.20 Mm 0.0018-0.0079 In
  Gap In Cylinder Bore 0.31-0.89 Mm 0.012-0.035 In
Piston Pin
  Diameter 22.994-22.997 Mm 0.9053-0.9054 In
  Clearance In Piston 0.008-0.016 Mm 0.00031-0.00063 In
  Fit In Rod -0.047 To -0.019 Mm Press Fit -0.0019 To -0.0007 In
Crankshaft
  Main Journal Diameter 67.239-67.257 Mm 2.6473-2.6483 In
  Main Journal Taper 0.005 Mm 0.0002 In
  Out Of Round - Max 0.005 Mm 0.0002 In
  Flange Runout - Max 0.04 Mm 0.0016 In
  Cylinder Block Main Bearing Bore Diameter 72.155-72.168 Mm 2.8407-2.8412 In
  Crankshaft Main Bearing Inside Diameter 67.289-67.316 Mm 2.6492-2.6502 In
  Main Bearing Clearance 0.019-0.064 Mm 0.0008-0.0025 In
  Main Thrust Bearing Clearance 0.032-0.077 Mm 0.0012-0.0030 In
  Crankshaft End Play 0.060-0.210 Mm 0.0024-0.0083 In
  Crankshaft Flange Runout - Max 0.04 Mm 0.0016 In
Connecting Rod
  Rod Bearing Journal Diameter 50.768-50.784 Mm 1.9987-1.9994 In
  Rod Bearing Journal Taper - Max 0.005 Mm 0.0002 In
  Rod Bearing Journal Out Of Round - Max 0.005 Mm 0.0002 In
  Rod Bearing Bore Diameter 53.962-53.984 Mm 2.124-2.125 In
  Rod Inside Bearing Diameter 50.812-50.850 Mm 2.000-2.002 In
  Rod Bearing Journal Clearance 0.018-0.062 Mm 0.0007-0.0024 In
  Rod Side Clearance 0.18-0.44 Mm 0.007-0.017 In
Camshaft
  Lobe Lift - Intake And Exhaust 6.9263 Mm 0.2727 In
  Journal Diameter 47.45-47.48 Mm 1.868-1.869 In
  Camshaft Bearing Bore Diameter-Front And Rear 51.03-51.08 Mm 2.009-2.011 In
  Camshaft Bearing Bore Diameter-Middle #2 And #3 50.77-50.82 Mm 1.999-2.001 In
  Camshaft Bearing Inside Diameter 47.523-47.549 Mm 1.871-1.872 In
  Journal Clearance 0.026-0.101 Mm 0.001-0.0039 In
  Journal Runout - Max 0.025 Mm 0.001 In
Valve System
  Roller Lifter Hydraulic
  Rocker Arm Ratio 1.60:1
  Valve Face Angle 45 Degrees
  Seat Angle 46 Degrees
  Valve Seat Runout 0.050 Mm 0.002 In
  Seat Width-Intake 1.55-1.80 Mm 0.061-0.071 In
  Seat Width-Exhaust 1.70-2.0 Mm 0.067-0.079 In
  Valve Margin - Minimum Intake 2.10 Mm 0.083 In
  Valve Margin - Minimum Exhaust 2.70 Mm 0.106 In
  Valve Stem Clearance 0.026-0.068 Mm 0.0010-0.0027 In
Valve Spring
  Valve Springs Free Length 48.5 mm 1.89 in
  Valve Springs Load - Closed 320 N @ 43.2 mm 75 lb @ 1.701 in
  Valve Springs Load - Open 1036 N @ 32 mm 230 lb @ 1.260 in
  Installed Height Intake-Exhaust 43.2 mm 1.701 in
  Approximate number of coils 6.55
Oil Pump
  Gear Lash 0.094-0.195 mm 0.0037-0.0077 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
Oil Pump Gear
  Length 30.45-30.48 mm 1.199-1.200 in
  Diameter 38.05-38.10 mm 1.498-1.500 in
  Side Clearance 0.038-0.088 mm 0.001-0.003 in
  End Clearance 0.040-0.125 mm 0.002-0.005 in
  Valve to Bore Clearance 0.038-0.089 mm 0.0015-0.0035 in
Fig 1: Sealers, Adhesives, and Lubricants
G01828829Courtesy of GENERAL MOTORS CORP.
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