The following specs apply to:

  • Gen. I, Small Block Chevy
Fastener Type Torque Spec
7/16 in. Outer Main Cap Bolt 65 ft.-lbs.
7/16 in. Inner Main Cap Bolt 70 ft.-lbs.
3/8 in. Outer Main Cap Bolt 40 ft.-lbs.
11/32 in. Connecting Rod Bolt 38-44 ft.-lbs.
3/8 in. Connecting Rod Bolt 40-45 ft,-lbs.
Cylinder Head Bolts 65 ft.-lbs.
Screw-In Rocker Arm Studs 50 ft.-lbs.
Intake Manifold Bolts (Cast Iron Heads) 30 ft.-lbs.
Oil Pump Bolt 60-70 ft.-lbs.
Cam Sprocket Bolts 18-20 ft.-lbs.
Harmonic Damper Bolt 60 ft.-lbs.
Flywheel/Flexplate Bolts 65 ft.-lbs.
Pressure Plate Bolts 35 ft.-lbs.
Bellhousing Bolts 25 ft.-lbs.
Exhaust Manifold Bolts 25 ft.-lbs.



  • 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.
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