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MG Engine >> ENGINE BOLT TORQUE

Engine Bolt Torque Information On
GM (Chevrolet) 1977 L-4, L-6 & V-8 Engines

Chevette L-4 Engine Torque Bolt Specifications

Usage Torques
---------------------------------------------------------------------------

Camshaft Carrier Bolts 90-95Nm 65-77 ft.lbs.
Camshaft Cover Nuts 1.4-1.8Nm 12-16 in.lbs.
Camshaft Sprocket Bolt 90-115Nm 65-85 ft.lbs.
Crankshaft Pulley Bolt 90-115Nm 65-85 ft.lbs.
Crankcase Front Cover Bolt 6-8Nm 55-75 in.lbs.
Front Cover Nut 5-8Nm 50-75 in.lbs.
Connecting Rod Nuts 46-54Nm 34-40 ft.lbs.
Coil Attaching Bolt 18-24Nm 13-18 ft.lbs.
Distributor Clamp Bolt 15-19Nm 11-14 ft.lbs.
Exhaust Manifold 26-34Nm 19-25ft.lbs.
Flywheel Bolt 54-75Nm 40-52 ft.lbs.
Fuel Pump Bolts 19-23Nm 14-17 ft.lbs.
Generator Bracket Bolt 30-40Nm 22-30 ft.lbs.
Idler Pulley Bolt 18-24Nm 13-18 ft.lbs.
Intake Manifold Bolt 18-24Nm 13-18 ft.lbs.
Main Bearing Caps 54-75Nm 40-52 ft.lbs.
Oil Drain Plug 20-27Nm 15-20 ft.lbs.
Oil Pan Bolts 5-7Nm 45-60 in.lbs.
Oil Suction Tube & Screen Ass. 26-34Nm 19-25 ft.lbs.
Oil Suction Tube Clamp 95-130Nm 70-95 in.lbs.
Oil Filter 16-23Nm 12-17 ft.lbs.
Oil Pump Cover Screws 8-11Nm 71-97 in.lbs.
Oil Pump Bolts 5-7Nm 45-60 in.lbs.
Water Pump Bolts 18-24Nm 13-18 ft.lbs.
Spark Plugs 27Nm 20 ft.lbs.

Vega - Monza L-4 Engine Bolt Torque Specifications

Size Usage Torque
----------------------------------------------------------

1/4-14 Engine Front Cover 50 in.lbs.
1/4-20 Cam Cover 80 in.lbs.
1/4-20 Oil Screen To Screen 50 in.lbs.
1/4-20 Clutch Housing Underpan 95 in.lbs.
1/4-20 Oil Screen Support To Baffle 50 in.lbs.
1/4-20 Oil Drain Back Tube To Baffle 50 in.lbs.
5/16-18 Fan Blade To Pump 20 ft.lbs.
5/16-18 Clutch Pressure Plate To Fly. 20 ft.lbs.
5/16-18 Crankshaft Damp/Pulley Sprkt. 15 ft.lbs.
5/16-18 Oil Pump To Case (Bolt) 15 ft.lbs.
5/16-18 Water Pump To Case 15 ft.lbs.
5/16-18 Oil Pan To Case 15 ft.lbs.
5/16-18 Cam Retainer 18 ft.lbs.
5/16-24 Ex. Gas Recirc. Valve To Man. 20 ft.lbs.
11/32-24 Connecting Rod Cap 35 ft.lbs.
3/8-16 Oil Pump To Case (Stud) 30 ft.lbs.
3/8-16 Distributor Clamp Nut 25 ft.lbs.
3/8-16 Water Outlet To Head 30 ft.lbs.
3/8-16 Manifold (Bolts) 30 ft.lbs.
3/8-16 Clutch Housing To Case 25 ft.lbs.
3/8-16 Clutch Pressure Plate To Fly. 30 ft.lbs.
3/8-18 Inlet Manifold To Head (Stud) 30 ft.lbs.
7/16-14 Engine Mount Stud To Block 20 ft.lbs.
7/16-14 Main Bearing Caps 65 ft.lbs.
7/16-14 Cylinder Head 60 ft.lbs.
7/16-20 Flywheel To Crank 65 ft.lbs.
1/2-13 Cam Sprocket To Cam 80 ft.lbs.
1/2-13 Damper/Pulley To Crank 80 ft.lbs.
1/2-20 Oil Pan Drain Plug 20 ft.lbs.
1.00-12 Oil Filter Connector To Case 30 ft.lbs.
1.00-12 Oil Filter Hand Tight
14mm Spark Plug 20 ft.lbs.

In-Line 4.1L (250 CID) Car - Truck Engine Bolt Torques

Size Usage Torque
----------------------------------------------------------------

1/4-20 Cam Thrust Plate 80 in.lbs.
1/4-20 Crankcase Front Cover 80 in.lbs.
1/4-20 Flywheel Housing Cover 80 in.lbs.
1/4-20 Oil Filter Bypass Valve 80 in.lbs.
1/4-20 Oil Pan To Crankcase 80 in.lbs.
1/4-20 Oil Pan To Front Cover 50 in.lbs.
1/4-20 Oil Pump Cover All 80 in.lbs.
1/4-20 Rocker Arm Cover 45 in.lbs.
11/32-24 Connecting Rod Cap 35 ft.lbs.
5/16-18 Camshaft Sprocket 20 ft.lbs.
5/16-18 Oil Pan To Crankcase 80 in.lbs.
5/16-18 Oil Pump 115 in.lbs.
5/16-18 Push Rod Cover 80 in.lbs.
5/16-18 Water Pump 15 in.lbs.
5/16-18 Rocker Cover 45 in.lbs.
3/8-16 Clutch Pressure Plate (All) 30 ft.lbs.
3/8-16 Distributor Clamp 25 ft.lbs.
3/8-16 Flywheel Housing 30 ft.lbs.
3/8-16 Manifold (Exhaust) 35 ft.lbs.
3/8-16 Manifold (Ex. To Int.)
3/8-16 Manifold (Intake) 30 ft.lbs.
3/8-16 Manifold To Head
3/8-16 Thermostat Housing 30 ft.lbs.
3/8-16 Water Outlet 30 ft.lbs.
3/8-16 Water Pump
3/8-24 Connecting Rod Cap
7/16-14 Cylinder Head 60 ft.lbs.
7/16-14 Main Bearing Cap 65 ft.lbs.
7/16-14 Oil Pump 65 ft.lbs.
7/16-14 Rocker Arm Stud 50 ft.lbs.
7/16-20 Flywheel (All) 45 ft.lbs.
7/16-20 Torsional Damper 60 ft.lbs.
1/2-13 Cylinder Head 95 ft.lbs.
1/2-13 Main Bearing Cap 110 ft.lbs.
1/2-14 Temperature Sending Unit 20 ft.lbs.
1/2-20 Torsional Damper
1/2-20 Oil Filter Hand Tight
1/2-20 Oil Pan Drain Plug 20 ft.lbs.
1/2-20 Flywheel
14mm 5/8 Spark Plug 15 ft.lbs.

In-Line 4.8L (292 CID) Passenger Car - Truck Engine Bolt Torque

Size Usage Torque
----------------------------------------------------------------

1/4-20 Cam Thrust Plate 80 in.lbs.
1/4-20 Crankcase Front Cover 80 in.lbs.
1/4-20 Flywheel Housing Cover 80 in.lbs.
1/4-20 Oil Filter Bypass Valve
1/4-20 Oil Pan To Crankcase 80 in.lbs.
1/4-20 Oil Pan To Front Cover 50 in.lbs.
1/4-20 Oil Pump Cover All 80 in.lbs.
1/4-20 Rocker Arm Cover 45 in.lbs.
11/32-24 Connecting Rod Cap
5/16-18 Camshaft Sprocket 20 ft.lbs.
5/16-18 Oil Pan To Crankcase 80 in.lbs.
5/16-18 Oil Pump 115 in.lbs.
5/16-18 Push Rod Cover 80 in.lbs.
5/16-18 Water Pump 15 in.lbs.
5/16-18 Rocker Cover 45 in.lbs.
3/8-16 Clutch Pressure Plate (All) 30 ft.lbs.
3/8-16 Distributor Clamp 25 ft.lbs.
3/8-16 Flywheel Housing 30 ft.lbs.
3/8-16 Manifold (Exhaust)
3/8-16 Manifold (Ex. To Int.) 40 ft.lbs.
3/8-16 Manifold (Intake) 30 ft.lbs.
3/8-16 Manifold To Head 40 ft.lbs.
3/8-16 Thermostat Housing 30 ft.lbs.
3/8-16 Water Outlet 30 ft.lbs.
3/8-16 Water Pump 25-30 ft.lbs.
3/8-24 Connecting Rod Cap
7/16-14 Cylinder Head
7/16-14 Main Bearing Cap 65 ft.lbs.
7/16-14 Oil Pump
7/16-14 Rocker Arm Stud
7/16-20 Flywheel (All) 45 ft.lbs.
7/16-20 Torsional Damper 60 ft.lbs.
1/2-13 Cylinder Head 95 ft.lbs.
1/2-13 Main Bearing Cap
1/2-14 Temperature Sending Unit 20 ft.lbs.
1/2-20 Torsional Damper
1/2-20 Oil Filter Hand Tight
1/2-20 Oil Pan Drain Plug 20 ft.lbs.
1/2-20 Flywheel 110 ft.lbs.
14mm 5/8 Spark Plug 15 ft.lbs.

Small V-8 5.0, 5.7 & 6.6L Passenger Car - Truck Engine Bolt Torques

Size Usage Torque
----------------------------------------------------------------

1/4-20 Cam Thrust Plate
1/4-20 Crankcase Front Cover 80 in.lbs.
1/4-20 Flywheel Housing Cover 80 in.lbs.
1/4-20 Oil Filter Bypass Valve 80 in.lbs.
1/4-20 Oil Pan To Crankcase 80 in.lbs.
1/4-20 Oil Pan To Front Cover
1/4-20 Oil Pump Cover All 80 in.lbs.
1/4-20 Rocker Arm Cover 45 in.lbs.
11/32-24 Connecting Rod Cap
5/16-18 Camshaft Sprocket 20 ft.lbs.
5/16-18 Oil Pan To Crankcase 165 in.lbs.
5/16-18 Oil Pump
5/16-18 Push Rod Cover
5/16-18 Water Pump
5/16-18 Rocker Cover
3/8-16 Clutch Pressure Plate (All) 30 ft.lbs.
3/8-16 Distributor Clamp 25 ft.lbs.
3/8-16 Flywheel Housing 30 ft.lbs.
3/8-16 Manifold (Exhaust) 20 ft.lbs.
3/8-16 Manifold (Ex. To Int.)
3/8-16 Manifold (Intake) 30 ft.lbs.
3/8-16 Manifold To Head
3/8-16 Thermostat Housing
3/8-16 Water Outlet 30 ft.lbs.
3/8-16 Water Pump 25-30 ft.lbs.
3/8-24 Connecting Rod Cap 45 ft.lbs.
7/16-14 Cylinder Head 65 ft.lbs.
7/16-14 Main Bearing Cap 60 ft.lbs.
7/16-14 Oil Pump 65 ft.lbs.
7/16-14 Rocker Arm Stud
7/16-20 Flywheel (All) 65 ft.lbs.
7/16-20 Torsional Damper 60 ft.lbs.
1/2-13 Cylinder Head
1/2-13 Main Bearing Cap
1/2-14 Temperature Sending Unit 20 ft.lbs.
1/2-20 Torsional Damper
1/2-20 Oil Filter 25 ft.lbs.
1/2-20 Oil Pan Drain Plug 20 ft.lbs.
1/2-20 Flywheel
14mm 5/8 Spark Plug 15 ft.lbs.

Mark IV V-8 Engine Bolt Torques

Size Usage Torque
----------------------------------------------------------------

1/4-20 Cam Thrust Plate
1/4-20 Crankcase Front Cover 80 in.lbs.
1/4-20 Flywheel Housing Cover 80 in.lbs.
1/4-20 Oil Filter Bypass Valve 80 in.lbs.
1/4-20 Oil Pan To Crankcase
1/4-20 Oil Pan To Front Cover 55 in.lbs.
1/4-20 Oil Pump Cover All 80 in.lbs.
1/4-20 Rocker Arm Cover 50 in.lbs.
11/32-24 Connecting Rod Cap
5/16-18 Camshaft Sprocket 20 ft.lbs.
5/16-18 Oil Pan To Crankcase 135 in.lbs.
5/16-18 Oil Pump
5/16-18 Push Rod Cover
5/16-18 Water Pump
5/16-18 Rocker Cover
3/8-16 Clutch Pressure Plate (All) 30 ft.lbs.
3/8-16 Distributor Clamp 25 ft.lbs.
3/8-16 Flywheel Housing 30 ft.lbs.
3/8-16 Manifold (Exhaust) 20 ft.lbs.
3/8-16 Manifold (Ex. To Int.)
3/8-16 Manifold (Intake) 30 ft.lbs.
3/8-16 Manifold To Head
3/8-16 Thermostat Housing
3/8-16 Water Outlet 30 ft.lbs.
3/8-16 Water Pump 25-30 ft.lbs.
3/8-24 Connecting Rod Cap 50 ft.lbs.
7/16-14 Cylinder Head 80 ft.lbs.
7/16-14 Main Bearing Cap
7/16-14 Oil Pump 65 ft.lbs.
7/16-14 Rocker Arm Stud 50 ft.lbs.
7/16-20 Flywheel (All) 65 ft.lbs.
7/16-20 Torsional Damper
1/2-13 Cylinder Head
1/2-13 Main Bearing Cap 110 ft.lbs.
1/2-14 Temperature Sending Unit 20 ft.lbs.
1/2-20 Torsional Damper 85 ft.lbs.
1/2-20 Oil Filter 25 ft.lbs.
1/2-20 Oil Pan Drain Plug 20 ft.lbs.
1/2-20 Flywheel
14mm 5/8 Spark Plug 15 ft.lbs.

The AERA Technical Committee

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