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Engine Torque Specifications



Torque Specifications for GM 6.5L-396ci-V8



Bell Housing  To  Engine Block
30 Ft-Lbs
360 In-Lbs
40.67 N-m
Years: All
Note: Mark IV
Type: Bolt Dim: UN 3/8 X 16 Length: Head: Hexagon Grade:



Bell Housing Cover  To  Bell Housing
6.67 Ft-Lbs
80 In-Lbs
9.04 N-m
Years: All
Note: Mark IV
Type: Bolt Dim: UN 1/4 X 20 Length: Head: Hexagon Grade:



Connecting Rod  To  Crankshaft
50 Ft-Lbs
600 In-Lbs
67.79 N-m
Years: All
Note: Mark IV
Type: Bolt Dim: UN 3/8 X 24 Length: Head: Nut Grade:



Crankshaft  To  Engine Block
95 Ft-Lbs
1140 In-Lbs
128.8 N-m
Years: All
Note: Mark IV - 2 Bolt Main Bearing Caps
Type: Bolt Dim: UN 1/2 X 13 Length: Head: Hexagon Grade:



Crankshaft  To  Engine Block
105 Ft-Lbs
1260 In-Lbs
142.36 N-m
Years: All
Note: Mark IV - 4 Bolt Main Bearing Caps
Type: Bolt Dim: UN 1/2 X 13 Length: Head: Hexagon Grade:



Cylinder Head  To  Engine Block
80 Ft-Lbs
960 In-Lbs
108.47 N-m
Years: All
Note: Mark IV
Type: Bolt Dim: UN 7/16 X 14 Length: Head: Hexagon Grade:



Distributor Clamp  To  Engine Block
10 Ft-Lbs
120 In-Lbs
13.56 N-m
Years: 1965-1968
Note: Mark IV
Type: Bolt Dim: UN 3/8 X 16 Length: Head: Hexagon Grade:



Distributor Clamp  To  Engine Block
20 Ft-Lbs
240 In-Lbs
27.12 N-m
Years: 1969-
Note: Mark IV
Type: Bolt Dim: UN 3/8 X 16 Length: Head: Hexagon Grade:



Drain Plug  To  Oil Pan
20 Ft-Lbs
240 In-Lbs
27.12 N-m
Years: All
Note: Mark IV - Oil Drain Plug
Type: Bolt Dim: UN 1/2 X 20 Length: Head: Hexagon Grade:



Engine Temp Sensor  To  Engine Block
20 Ft-Lbs
240 In-Lbs
27.12 N-m
Years: All
Note: Mark IV
Type: Dim: UN 1/2 X 14 Length: Head: Grade:



Exhaust Manifold  To  Cylinder Head
20 Ft-Lbs
240 In-Lbs
27.12 N-m
Years: All
Note: Mark IV
Type: Bolt Dim: UN 3/8 X 16 Length: Head: Hexagon Grade:



Flywheel  To  Crankshaft
60 Ft-Lbs
720 In-Lbs
81.35 N-m
Years: 1965-1968
Note: Mark IV
Type: Bolt Dim: UN 7/16 X 20 Length: Head: Hexagon Grade:



Flywheel  To  Crankshaft
65 Ft-Lbs
780 In-Lbs
88.13 N-m
Years: 1969-
Note: Mark IV
Type: Bolt Dim: UN 7/16 X 20 Length: Head: Hexagon Grade:



Intake Manifold  To  Cylinder Head
30 Ft-Lbs
360 In-Lbs
40.67 N-m
Years: All
Note: Mark IV
Type: Bolt Dim: UN 3/8 X 16 Length: Head: Hexagon Grade:



Oil Pan  To  Engine Block
11.25 Ft-Lbs
135 In-Lbs
15.26 N-m
Years: All
Note: Mark IV
Type: Bolt Dim: UN 5/16 X 18 Length: Head: Hexagon Grade:



Oil Pan  To  Engine Block
6.67 Ft-Lbs
80 In-Lbs
9.04 N-m
Years: All
Note: Mark IV
Type: Bolt Dim: UN 1/4 X 20 Length: Head: Hexagon Grade:



Oil Pan  To  Timing Chain/Belt Cover
6.67 Ft-Lbs
80 In-Lbs
9.04 N-m
Years: 1965-1973
Note: Mark IV
Type: Bolt Dim: UN 1/4 X 20 Length: Head: Hexagon Grade:



Oil Pan  To  Timing Chain/Belt Cover
4.58 Ft-Lbs
55 In-Lbs
6.22 N-m
Years: 1974-
Note: Mark IV
Type: Bolt Dim: UN 1/4 X 20 Length: Head: Hexagon Grade:



Oil Pump  To  Engine Block
65 Ft-Lbs
780 In-Lbs
88.13 N-m
Years: All
Note: Mark IV
Type: Bolt Dim: UN 7/16 X 14 Length: Head: Hexagon Grade:



Oil Pump Cover  To  Oil Pump
6.67 Ft-Lbs
80 In-Lbs
9.04 N-m
Years: All
Note: Mark IV
Type: Bolt Dim: UN 1/4 X 20 Length: Head: Hexagon Grade:



Pressure Plate  To  Flywheel
35 Ft-Lbs
420 In-Lbs
47.45 N-m
Years: All
Note: Mark IV
Type: Bolt Dim: UN 3/8 X 16 Length: Head: Hexagon Grade:



Rocker Arm Stud  To  Cylinder Head
50 Ft-Lbs
600 In-Lbs
67.79 N-m
Years: All
Note: Mark IV
Type: Dim: UN 7/16 X 14 Length: Head: Grade:



Spark Plug  To  Cylinder Head
25 Ft-Lbs
300 In-Lbs
33.9 N-m
Years: 1965-1970
Note: Mark IV
Type: Dim: Length: Head: Grade:



Spark Plug  To  Cylinder Head
15 Ft-Lbs
180 In-Lbs
20.34 N-m
Years: 1971-
Note: Mark IV
Type: Dim: Length: Head: Grade:



Timing Chain/Belt Cover  To  Engine Block
6.67 Ft-Lbs
80 In-Lbs
9.04 N-m
Years: All
Note: Mark IV - Crankcase Front Cover
Type: Bolt Dim: UN 1/4 X 20 Length: Head: Hexagon Grade:



Timing Chain/Belt Sprocket  To  Camshaft
20 Ft-Lbs
240 In-Lbs
27.12 N-m
Years: All
Note: Mark IV
Type: Bolt Dim: UN 5/16 X 18 Length: Head: Hexagon Grade:



Valve Cover  To  Cylinder Head
4.17 Ft-Lbs
50 In-Lbs
5.65 N-m
Years: All
Note: Mark IV
Type: Bolt Dim: UN 1/4 X 20 Length: Head: Hexagon Grade:



Vibration Damper/Hub  To  Crankshaft
85 Ft-Lbs
1020 In-Lbs
115.24 N-m
Years: All
Note: Mark IV
Type: Bolt Dim: UN 1/2 X 20 Length: Head: Hexagon Grade:



Water Adapter/Connector  To  Intake Manifold
20 Ft-Lbs
240 In-Lbs
27.12 N-m
Years: 1965-1970
Note: Mark IV - Water Outlet
Type: Bolt Dim: UN 3/8 X 16 Length: Head: Hexagon Grade:



Water Adapter/Connector  To  Intake Manifold
30 Ft-Lbs
360 In-Lbs
40.67 N-m
Years: 1971-
Note: Mark IV
Type: Bolt Dim: UN 3/8 X 16 Length: Head: Hexagon Grade:



Water Pump  To  Engine Block
30 Ft-Lbs
360 In-Lbs
40.67 N-m
Years: All
Note: Mark IV
Type: Bolt Dim: UN 3/8 X 16 Length: Head: Hexagon Grade: