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High Performance Engine Torque Specifications American V6s & V8s

Chevrolet Engines

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Chevrolet V6 90°

Iron Engines
Component Torque
Camshaft Sprocket Bolts 20 ft. lbs.
Cylinder Head Bolts 65 ft. lbs.
Exhaust Manifold 25 ft. lbs.
Flywheel Bolts 60 ft. lbs.
Front Cover Bolts 75 inch lbs.
Intake Manifold 30 ft. lbs.
Main Bearing Bolts Inner 70 ft. lbs.
Outer 65 ft. lbs.
Oil Pan Bolts 165 inch lbs.
Rocker Arm Stud ( aluminum head ) 50 ft. lbs.
Rod Bearing Nuts 45-50 ft. lbs.
Valve Cover Bolts 25 inch lbs.
Chevrolet V6 90°

Aluminum Engines
Component Torque
Bell housing 25 ft. lbs.
Camshaft Sprocket Bolts 20 ft. lbs.
Cylinder Head Bolts w/Hardened Washer Long 65 ft. lbs
Short 60 ft. lbs.
Cylinder Head Stud Long 65 ft. lbs.
Short 60 ft. lbs.
Exhaust Manifold 20 ft. lbs.
Flywheel Bolts 60 ft. lbs.
Front Cover Bolts 75 inch lbs.
Intake Manifold 25 ft. lbs.
Main Bearing... Studs 70 ft. lbs.
Inner Bolt 70 ft. lbs.
Outer Bolt 70 ft. lbs.
Rocker Arm Studs ( Aluminum head ) 50 ft. lbs.
Rod Bearing Bolts ( 3/8in. ) 45-50 ft. lbs.
Bow-Tie Rod Bearing Bolts ( 7/16in.) 70 ft. lbs.
Valve Cover Bolts 25 inch lbs.

 

Fig. 1 Cylinder head bolt torque sequence-V6
Chevrolet Small-Block

Iron Engines
Component Torque
Camshaft Sprocket Bolts 20 ft. lbs.
Cylinder Head Bolts 65 ft. lbs.
Exhaust Manifold 25 ft. lbs.
Flywheel Bolts 60 ft. lbs.
Front Cover Bolts 75 inch lbs.
Intake Manifold 30 ft. lbs.
Main Bearing Bolts Inner 70 ft. lbs.
Outer 65 ft. lbs.
Oil Pan Bolts 165 inch lbs.
Rocker Arm Studs ( Aluminum head ) 50 ft. lbs.
Rocker Arm Studs ( Iron head ) 50 ft. lbs.
Rod Bearing Bolts ( 3/8in.) 45-50 ft. lbs.
Bow-Tie Rod Bearing Bolts (7/16in.) 70 ft. lbs.
Valve Cover Bolts 25 inch lbs.
Chevrolet Small-Block

Aluminum Engines
Component Torque
Bell housing 25 ft. lbs.
Camshaft Sprocket Bolts 20 ft. lbs.
Cylinder Head Bolts w/Hardened Washer Long 65 ft. lbs.
Short 60 ft. lbs.
Cylinder Head Stud Long 65 ft. lbs.
Short 60 ft. lbs.
Exhaust Manifold 20 ft. lbs.
Flywheel Bolts 60 ft. lbs.
Front Cover Bolts 75 inch lbs.
Intake Manifold 25 ft. lbs.
Main Bearing... Studs 70 ft. lbs.
Inner Bolts 70 ft. lbs.
Outer Bolts 70 ft. lbs.
Oil Pan Bolts 165 inch lbs.
Rocker Arm Studs ( Aluminum head ) 50 ft. lbs.
Rod Bearing Bolts ( 3/8in.) 45-50 ft. lbs.
Bow-Tie Rod Bearing Bolts (7/16in.) 70 ft. lbs.
Valve Cover Bolts 25 inch lbs.
Fig. 2 Cylinder head torque sequence-Small block V8.
Chevrolet Big-Block

Iron Engines
Component Torque
Camshaft Sprocket Bolts 20 ft. lbs.
Cylinder Head Bolts Long 70 ft. lbs.
Short 70 ft. lbs.
Cylinder Head Studs Long 65 ft. lbs.
Short 65 ft. lbs.
Exhaust Manifold 20 ft. lbs.
Flywheel Bolts 60 ft. lbs.
Front Cover Bolts 75 inch lbs.
Intake Manifold 25 ft. lbs.
Main Bearing Bolts Inner 110 ft. lbs.
Outer 110 ft. lbs.
Oil Pan Bolts 165 inch lbs.
Rocker Arm Studs ( All ) 50 ft. lbs.
Rod Bearing Bolts ( 7/16in.) 67-73 ft. lbs.
Valve Cover Bolts 25 inch lbs.
Chevrolet Big-Block

Aluminum Engines
Component Torque
Bell housing 25 ft. lbs.
Camshaft Sprocket Bolts 20 ft. lbs.
Cylinder Head Bolts w/Hardened Washer Long 70 ft. lbs.
Short 70 ft. lbs.
Cylinder Head Studs Long 65 ft. lbs.
Short 60 ft. lbs.
Exhaust Manifold 20 ft. lbs.
Flywheel Bolts 60 ft. lbs.
Front Cover Bolts 75 inch lbs.
Intake Manifold 25 ft. lbs.
Oil Pan Bolts 165 inch lbs.
Rocker Arm Studs ( Aluminum head ) 50 ft. lbs.
Rod Bearing Bolts ( 7/16in.) 67-73 ft. lbs.
Valley Studs (4) 50-55 ft. lbs.
Valve Cover Bolts 25 inch lbs.
Fig. 3 Cylinder head torque sequence-Big block V8.

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