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

                             Procedure For Installing A Cast Iron Sleeve 
                                         In The Aluminum Vega Engine

BLOCK PREPARATION:

Before fitting the block with sleeves, the top surface of the block must be checked for warpage or shrink between the inner wall surfaces and outside edge of the deck.  Scrape the gasket surface clean and place a straight edge across each siamese section as illustrated in Figure 1.  If a .003 feeler stock can be inserted under the straight edge, the block must be resurfaced.
 
CYLINDER HEAD PREPARATION:

The cylinder head must be checked with a straight edge in the same manner as shown in Figure 1 and be resurfaced if a .003 feeler stock can be inserted beneath the straight edge. 

When the preliminary work is completed, proceed as follows:

     A.   Before boring the block, you must find the actual O.D. of the sleeve.Measure the sleeve O.D. with a micrometer in three places 120^ apart near top and bottom.  Add all six readings together and divide by six.  This will give you the actual O.D. from which to figure boring size in block.

     B.   Bore block same size as sleeve and hone out block .001; to .0015 (one to one and one-half thousandths) larger than actual sleeve O.D.  Use honing stones such as MM-33-J63 for hand hone and C30-A53 for CK-10 automatic hone.

     C.   Proceed to machine the counterbore diameter as shown in Figure 2. To avoid possible interference with the  sleeve undercut fillet, the top corner of the broe must be chamfered .005 to .010 X 45^.

     D.   You should now be able to insert up to 3/4 of the sleeve by hand push for slip fit.  Tap sleeve gently with a rawhide mallet orplastic hammer to settle it
          down into final position.  Extra honing of the I.D. is unnecessary as the sleeve is completely finished at the factory.  After installation, the sleeve flange should project from .002 to .003 above the top of the block. Dimensions are determined by the sleeve used.

                                                                                The AERA Technical Committee

   Anti-Seize Compound Recommended For Aluminum Engine Blocks

When working on Vega or other aluminum engines, shop personnel
are reminded that a;ll tapped holes in blocks have aluminum
threads.  There is always a chance that when removing steel bolts
from aluminum, automotive technicians can pull aluminum threads
out of the holes.

Some employees are urged to use anti-seize compound on cylinder
headof main bearing cap bolts.  These bolts have high torqued
specifications, and therefore, have a greater tendency to lock
onto the aluminum threads.

It is a recommended procedure to use anit-seize compound on any
steel inserted into aluminum threads.


                                     The AERA Technical Committee


January 1975 - SPB 24

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