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Engine Bolt Torque Specifications

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

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