Mopar Bolt Torque Specifications – Small Block

Mopar Small Block Bolt Torque Specifications

SmallBlock LA Engine – 273, 318, 340, 360

 

Torque specifications are for stock factory type bolts with light engine oil applied to the threads and the underside of the bolt head. Other lubrications offer reduced friction and increased bolt tension, and will affect the torque figure. If using aftermarket performance bolts, like ARP, you should follow the recommended torque specifications of the aftermarket bolts.

Fastener

Torque

Thread Size

Camshaft Lockbolt

35

7/16-14

Carburetor to Manifold Nut

7

5/16-24

Clutch Housing Bolt

30

3/8-16

Connecting Rod Nut – Plain

45

3/8-24

Crankshaft Bolt (Vibration Damper)

135

3/4-16

Cylinder Head Bolt 273-318

85

1/2-13

Cylinder Head Bolt 340-360

95

1/2-13

Flywheel Cover Bolt

100 in/lbs

1/4-20

Flywheel Housing to Block Bolt

50

 

Flywheel to Crankshaft Bolt

55

7/16-20

Fuel Pump to Block

30

3/8-16

Intake Manifold Bolt

35

3/8-16

Main Bearing Cap Bolt

85

1/2-13

Oil Pan Drain Plug

20

1/2-20

Oil Pan Bolt

15

5/16-20

Oil Pump Cover Bolt

95 in/lbs

1/4-20

Oil Pump to Block Bolt

35

3/8-16

Rocker Shaft Bolt

30

3/8-16

Spark Plug

30

14mm

Timing Cover Bolt (cast)

30

3/8-16

Torque Converter to Flexplate Bolt

270 in/lbs

5/16-24

Vibration Damper Pulley Bolt

200 in/lbs

5/16-20

Water Pump to Block Bolt

30

3/8-16

 

* Torque values shown are in ft/lbs unless otherwise noted – Follow factory torque sequence.