Torque Pattern for Big Block Chevrolet

366, 396, 402, 454
Big Block Chevrolet

Torque Specs

Main cap bolt, 396-427 2-bolt 95 ft.-lbs.
Main cap bolt, 396-454 4-bolt (inner/outer) 110 ft.-lbs.
3/8 in. connecting rod bolt 50 ft.-lbs.
7/16 in. connecting rod bolt 67-73 ft.-lbs.
Cylinder head bolts, long 75 - 80 ft.-lbs.
Cylinder head bolts, short 65-68 ft.-lbs.
Screw-in rocker arm studs 50 ft.-lbs.
Intake manifold bolts (cast iron head) 25 - 30 ft.-lbs.
Oil pump bolt 65 ft.-lbs.
Cam sprocket bolts 20 ft.-lbs.
Harmonic damper bolt 85 ft.-lbs.
Flywheel/Flexplate bolts 60 ft.-lbs.
Pressure plate bolts 35 ft.-lbs.
Bell housing bolts 25 ft.-lbs.
Exhaust manifold bolts 20 ft.-lbs.
Timing Cover  7 ft-lbs.
Oil Pan Bolts  7 ft-lbs large bolts 12 ft-lbs
Valve Cover Bolts  5 ft-lbs
Camshaft Sprocket Bolts  20 ft-lbs
Water Pump Bolts  20 ft-lbs
Temprature Sending unit  20 ft-lbs
Spark Plug  5/8     15 ft-lbs
13/16   22 ft-lbs
Bolt Torque Specifications for the Big
Block Chevrolet
Camaro
Chevelle
Corvette
El Camino
Monte Carlo
Nova
Chevy Truck
Nothing Runs Like a Big Block Chevy!
Torque Numbers for Big Block Chevy
Spark Plugs for
1969  396 & 427...........................AC  R44XLS
1970  402  (265HP)......................AC  R44
454  (345HP)......................AC  R44T
454  (390-450HP)...............AC R43TS
1971   402.....................................AC R45TS
454.....................................AC R43TS
1972   454.....................................AC R43TS