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Fastener Tightening Specifications

WARNING: This page is about a different variant/trim than selected.
TORQUE SPECIFICATIONS

Application Ft. Lbs (N.m)
Balance Shaft Driven Gear Bolt
First Tightening Pass 15 (20)
Final Tightening Pass 35 Degrees
Battery Negative Cable-To-Engine Bolt 18 (25)
Belt Idler Pulley Bolt 37 (50)
Camshaft Sprocket Bolt 18 (25)
Connecting Rod Nut
First Tightening Pass 20 (27)
Final Tightening Pass 70 Degrees
Crankshaft Balancer Bolt 70 (95)
Crankshaft Balancer Remover/Installer Bolt (Special Tool J-23523-F) 18 (25)
Crankshaft Bearing Cap Bolt (Preferred Method)
First Tightening Pass 15 (20)
Final Tightening Pass 73 Degrees
Crankshaft Bearing Cap Bolt (Optional Strategy) 77 (105)
Crankshaft Pulley Bolt 43 (58)
Cylinder Head Bolt (Preferred Method)
First Tightening Pass (All Bolts) (1) 22 (30)
Final Tightening Pass (Large Bolts) 75 Degrees
Final Tightening Pass (Medium Bolts) 65 Degrees
Final Tightening Pass (Small Bolts) 55 Degrees
Cylinder Head Bolt (Optional Strategy) (1)
First Tightening Pass 26 (35)
Second Tightening Pass 44 (60)
Final Tightening Pass 66 (90)
Cylinder Head Core Hole Plug 15 (20)
Distributor Clamp Bolt 18 (25)
Dive Belt Idler Pulley Bolt 37 (50)
Drive Belt Tensioner Bolt 37 (50)
Engine Block Coolant Drain Hole Plug 15 (20)
Engine Block Left Rear Oil Gallery Plug 22 (30)
Engine Block Left Side Oil Gallery Plug 15 (20)
Engine Block Oil Gallery Plug 15 (20)
Engine Block Right Rear Oil Gallery Plug 15 (20)
Engine Coolant Temperature Sensor 15 (20)
Engine Flywheel Bolt (2) 74 (100)
Engine Lift Bracket Bolt (Special Tool J-41427) 11 (15)
Engine Lift Front Bracket Stud 26 (35)
Engine Mount Adapter Bolts 37 (50)
Engine Mount-To-Engine Bolts 37 (50)
Engine Mount-To-Frame Bracket Bolts 44 (60)
Engine Oil Pressure Gage Sensor 22 (30)
Engine Oil Pressure Gage Sensor Fitting (Plus Required Angle) 11 (15)
Exhaust Manifold Bolt/Stud
First Tightening Pass 11 (15)
Final Tightening Pass 22 (30)
Fan & Water Pump Pulley Bolt 18 (25)
Generator & Drive Belt Tensioner Bracket-To-Engine Bolt 30 (41)
Generator & Drive Belt Tensioner Bracket-To-Engine Stud 15 (20)
Generator & Drive Belt Tensioner Bracket Stud Nut 30 (41)
Knock Sensor 18 (25)
Oil Fill Tube Lower Support Bolt & Stud 18 (25)
Oil Filter Adapter Bolt 15 (21)
Oil Filter Fitting 41 (55)
Oil Pan Bolt & Nut (3) 18 (25)
Oil Pan Drain Plug 18 (25)
Oil Pump-To-Rear Crankshaft Bearing Cap Bolt 66 (90)
Power Steering Pump Bolt 37 (50)
Power Steering Pump Bracket-To-Engine Bolt 30 (41)
Power Steering Pump Bracket Stud Nut 30 (41)
Power Steering Pump Bracket-To-Engine Stud 15 (20)
Power Steering Pump Rear Bracket-To-Engine Nut 30 (41)
Power Steering Pump Rear Bracket-To-Power Steering Pump Nut 37 (50)
Spark Plug
Initial Installation (NEW Cylinder Head) 22 (30)
All Subsequent Installations 11 (15)
Transmission-To-Oil Pan Bolt 35 (47)
Transmission Control Cable Bracket Bolt 30 (40)
Valve Lifter Pushrod Guide Bolt 12 (16)
Valve Rocker Arm Bolt 22 (30)
Water Outlet Stud 18 (25)
Water Pump Bolt 33 (45)
INCH Lbs. (N.m) 
Accelerator Control Cable Bracket Nut 106 (12)
Accelerator Control Cable Bracket-To-Intake Manifold Stud 53 (6)
Accelerator Control Cable Bracket-To-Throttle Body Stud 106 (12)
Air Cleaner Adapter Stud 89 (10)
Air Cleaner Outlet Duct Nut 18 (2)
Balance Shaft Retainer Bolt 106 (12)
Camshaft Retainer Bolt 106 (12)
Crankshaft Position Sensor Bolt 80 (9)
Crankshaft Rear Oil Seal Housing Bolt & Nut 106 (12)
Crankshaft Rear Oil Seal Housing Retainer Stud 53 (6)
Distributor Cap Bolt 21 (2.4)
Engine Coolant Heater Bolt/Screw 18 (2)
Engine Front Cover Bolt 106 (12)
Engine Mount Heat Shield Bolt 53 (6)
Engine Oil Level Sensor 111 (13)
Engine Wiring Harness Bracket Nut-To-Intake Manifold Stud 106 (12)
Engine Wiring Harness Retainer Nut-To-Transmission-To-Engine Stud 89 (10)
Evaporative Emission Canister Purge Solenoid Valve-To-Intake Manifold Nut 89 (10)
Fuel Meter Body Bracket Bolt 89 (10)
Fuel Pipe Bracket Bolt 53 (6)
Fuel Pipe Retainer Nut 27 (3)
Ground Wire-To-Rear Of Left Cylinder Head Bolt 89 (10)
Ground Wire Nut-To-Water Outlet Stud 89 (10)
Ground Wire-To-Rear of Right Cylinder Head Stud 89 (10)
Heater Inlet & Outlet Hose Bracket-To-Oil Fill Tube Lower Support Bolt 44 (5)
Ignition Coil Stud 106 (12)
Lower Intake Manifold Bolt (4)
First Tightening Pass 27 (3)
Second Tightening Pass 106 (12)
Final Tightening Pass 133 (15)
Oil Fill Tube Nut 106 (12)
Oil Fill Tube-To-Oil Fill Tube Lower Support Bolt 44 (5)
Oil Level Indicator Tube Bolt 106 (12)
Oil Level Indicator Tube-To-Oil Fill Tube Lower Support Bolt 44 (5)
Oil Pan Baffle Bolt 106 (12)
Oil Pump Cover Bolt 106 (12)
Power Brake Booster Vacuum Hose Bracket Nut-To-Intake Manifold Stud 97 (11)
Spark Plug Wire Support Bolt 106 (12)
Starter Motor Wiring Harness/Transmission Cooler Pipe Bracket-To-Oil Pan Bolt 80 (9)
Throttle Body Stud 80 (9)
Transmission Cover Bolt 106 (12)
Transmission Fluid Fill Tube-To-Rear Of Engine Bolt 89 (10)
Upper Intake Manifold Stud
First Tightening Pass 44 (5)
Final Tightening Pass 80 (9)
Vacuum Brake Booster Hose Bracket Nut 97 (11)
Valve Rocker Arm Cover Bolt 106 (12)
(1) Tighten bolts/nuts following sequence shown. See Fig 1.
(2) Tighten bolts/nuts following sequence shown. See Fig 2.
(3) Tighten bolts/nuts following sequence shown. See Fig 3.
(4) Tighten bolts/nuts following sequence shown. See Fig 4.
Fig 1: Identifying Cylinder Head Bolt Tightening Sequence (4.3L)
G95B27053Courtesy of GENERAL MOTORS CORP.
Fig 2: Identifying Flywheel Bolt Tightening Sequence (4.3L)
G00247160Courtesy of GENERAL MOTORS CORP.
Fig 3: Identifying Oil Pan Bolt Tightening Sequence (4.3L)
G97A03616Courtesy of GENERAL MOTORS CORP.
Fig 4: Identifying Lower Intake Manifold Bolt Tightening Sequence (4.3L)
G00178762Courtesy of GENERAL MOTORS CORP.