These specs are for stock-type bolts with light engine oil applied to the threads and the underside of the bolt head. Moly and other lubes offer reduced friction and increased bolt tension, which will affect the torque figure. If you use aftermarket performance bolts like ARP's, you should follow the recommended torque specifications.
Please note that some specifications are in inch-pounds rather than foot-pounds. Read the charts carefully to prevent broken bolts due to excessive torquing.
426 Hemi Engine Torque Specifications
* Torque values shown are in ft/lbs unless otherwise noted
* Follow factory torque sequence
|
Fastener |
Torque |
Thread Size |
| Alternator Adjusting Strap Bolt |
15 |
5/16-18 |
| Alternator Bracket to Block Bolt |
30 |
3/8-16 |
| Alternator Mounting Bolt |
30 |
3/8-16 |
| Camshaft Gear Retaining Bolt |
40 |
3/8-16 |
| Carburetor to Manifold Nut |
7 |
5/16-24 |
| Clutch Housing Bolt |
50 |
7/16-14 |
| Connecting Rod Nut |
75 |
7/16-20 |
| Crankshaft Rear Seal Retainer |
30 |
3/8-16 |
| Crankshaft Bolt (Vibration Damper) |
135 |
3/4-16 |
| Cylinder Head Bolt |
70-75 |
7/16-14 |
| Cylinder Head Stud Nut |
70-75 |
7/16-20 |
| Distributor Clamp Bolt |
200 in/lbs |
5/16-18 |
| Exhaust Manifold Bolt |
35 |
3/8-16 |
| Fan Attaching Bolt |
15 |
5/16-18 |
| Flywheel Cover Bolt |
7 |
1/4-20 |
| Flywheel Housing to Block Bolt |
50 |
7/16-14 |
| Flywheel to Crankshaft Bolt |
70 |
7/16-20 |
| Fuel Pump to Block |
30 |
3/8-16 |
| Main Bearing Cap Bolt |
100 |
1/2-13 |
| Main Bearing Cap Tie Bolt |
45 |
3/8-16 |
| Oil Pan Drain Plug |
20 |
1/2-20 |
| Oil Pan Bolt |
15 |
5/16-20 |
| Oil Pump Cover Bolt |
10 |
5/16-18 |
| Oil Pump to Block Bolt |
30 |
3/8-16 |
| Rocker Shaft Bolt |
30 |
3/8-16 |
| Spark Plug |
30 |
14mm |
| Starter Mounting Bolt |
50 |
7/16-14 |
| Timing Cover Bolt - Upper |
15-18 |
5/16-18 |
| Timing Cover Bolt - Lower |
15-18 |
3/8-16 |
| Torque Converter Housing Bolt |
30 |
3/8-16 |
| Torque Converter to Flexplate Bolt |
65 |
7/16-20 |
| Valve Cover Stud & Nut |
40in/lbs |
1/4-28 |
| Water Pump to Housing Bolt |
30 |
3/8-16 |
| Water Pump Housing to Block Bolt |
30 |
3/8-16 |
RB/B Engine Torque Specifications Big Block Chrysler 383, 400, 440
* Torque values shown are in ft/lbs unless otherwise noted
* Follow factory torque sequence
|
Fastener |
Torque |
Thread Size |
| A/C Compressor to Engine Bolt |
30 |
3/8-16 |
| Alternator Adjusting Strap Bolt |
200 in/lbs |
5/16-18 |
| Alternator Adjusting Strap to Block Bolt |
30 |
3/8-16 |
| Alternator Mounting Bolt |
30 |
3/8-16 |
| Camshaft Lockbolt |
35 |
7/16-14 |
| Carburetor to Manifold Nut |
7 |
5/16-24 |
| Clutch Housing Bolt |
50 |
7/16-14 |
| Connecting Rod Nut - Plain |
45 |
3/8-24 |
| Crankshaft Rear Seal Retainer |
30 |
3/8-16 |
| Crankshaft Bolt (Vibration Damper) |
135 |
3/4-16 |
| Cylinder Head Bolt |
70 |
7/16-14 |
| Distributor Clamp Bolt |
15 |
5/16-18 |
| Exhaust Manifold Nut |
30 |
3/8-16 |
| Exhaust Pipe Flange Nut |
50 |
7/16-20 |
| Exhaust Pipe Clamp Nut |
20 |
3/8-24 |
| Fan Attaching Bolt |
15-18 |
5/16-18 |
| Flywheel Cover Bolt |
7 |
1/4-20 |
| Flywheel Housing to Block Bolt |
50 |
7/16-14 |
| Flywheel to Crankshaft Bolt |
55 |
7/16-20 |
| Fuel Pump to Block |
30 |
3/8-16 |
| Intake Manifold Bolt |
40 |
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 |
10 |
5/16-18 |
| Oil Pump to Block Bolt |
35 |
3/8-16 |
| Rocker Shaft Bolt |
25 |
3/8-16 |
| Spark Plug |
30 |
14mm |
| Starter Mounting Bolt |
50 |
7/16-14 |
| Timing Cover Bolt |
15 |
5/16-18 |
| Torque Converter Housing Bolt |
30 |
3/8-16 |
| Torque Converter to Flexplate Bolt |
270 in/lbs |
5/16-24 |
| Valley Pan End Bolt |
9 |
1/4-20 |
| Valve Cover Stud & Nut |
7 |
1/4-20 |
| Vibration Damper Pulley Bolt |
200 in/lbs |
5/16-20 |
| Water Pump to Housing Bolt |
30 |
3/8-16 |
| Water Pump Housing to Block Bolt |
30 |
3/8-16 |
LA Engine Torque Specifications Small Block Chrysler 273, 318, 340, 360
* Torque values shown are in ft/lbs unless otherwise noted
* Follow factory torque sequence
|
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 |
