Automotive Engine Torque Specs

Torque Specifications for
GM 6.6L-402ci-V8-MARK-IV

Bell Housing To Engine Block

30 Ft-Lbs

360 In-Lbs

40.67 N-m

Years: All

Note: Mark IV

Type: Bolt

Dim: UN3/8X16

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: UN1/4X20

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: UN3/8X24

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: UN1/2X13

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: UN1/2X13

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: UN7/16X14

Length:

Head: Hexagon

Grade:

Distributor Clamp To Engine Block

20 Ft-Lbs

240 In-Lbs

27.12 N-m

Years: All

Note: Mark IV

Type: Bolt

Dim: UN3/8X16

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: UN1/2X20

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: UN1/2X14

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: UN3/8X16

Length:

Head: Hexagon

Grade:

Flywheel To Crankshaft

65 Ft-Lbs

780 In-Lbs

88.13 N-m

Years: All

Note: Mark IV

Type: Bolt

Dim: UN7/16X20

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: UN3/8X16

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: UN5/16X18

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: UN1/4X20

Length:

Head: Hexagon

Grade:

Oil Pan To Timing Chain/Belt Cover

6.67 Ft-Lbs

80 In-Lbs

9.04 N-m

Years: 1970-1973

Note: Mark IV

Type: Bolt

Dim: UN1/4X20

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: UN1/4X20

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: UN7/16X14

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: UN1/4X20

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: UN3/8X16

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: UN7/16X14

Length:

Head:

Grade:

Spark Plug To Cylinder Head

25 Ft-Lbs

300 In-Lbs

33.9 N-m

Years: 1970-1970

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: UN1/4X20

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: UN5/16X18

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: UN1/4X20

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: UN1/2X20

Length:

Head: Hexagon

Grade:

Water Adapter/Connector To Intake Manifold

20 Ft-Lbs

240 In-Lbs

27.12 N-m

Years: 1970-1970

Note: Mark IV - Water Outlet

Type: Bolt

Dim: UN3/8X16

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: UN3/8X16

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: UN3/8X16

Length:

Head: Hexagon

Grade: