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Casting Numbers: Engine Bolt Torque Specifications
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Casting Numbers: Engine Bolt Torque Specifications

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.

 
Engine Bolt Torque Specifications - 426 Hemi, RB, B, LA Engines
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
 
 
 
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