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Bolt Torque Spec Chart for Chevy / GM
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Small Block Chevy |
Big Block Chevy |
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Fastener Type |
Torque Spec |
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Fastener Type |
Torque Specs |
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7/16 in. outer main cap bolt |
65 ft.-lbs. |
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Main cap bolt, 396-427 2-bolt |
95 ft.-lbs. |
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7/16 in. inner main cap bolt |
70 ft.-lbs. |
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Main cap bolt, 396-454 4-bolt (inner/outer) |
110 ft.-lbs. |
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3/8 in. outer main cap bolt |
40 ft.-lbs. |
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3/8 in. connecting rod bolt |
50 ft.-lbs. |
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11/32 in. connecting rod bolt |
38-44 ft.-lbs. |
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7/16 in. connecting rod bolt |
67-73 ft.-lbs. |
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3/8 in. connecting rod bolt |
40-45 ft.-lbs. |
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Cylinder head bolts, long |
75 ft.-lbs. |
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Cylinder head bolts |
65 ft.-lbs. |
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Cylinder head bolts, short |
65-68 ft.-lbs. |
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Screw-in rocker arm studs |
50 ft.-lbs. |
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Screw-in rocker arm studs |
50 ft.-lbs. |
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Intake manifold bolts (cast iron heads) |
30 ft.-lbs. |
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Intake manifold bolts (cast iron head) |
25 ft.-lbs. |
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Oil pump bolt |
60-70 ft.-lbs. |
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Oil pump bolt |
65 ft.-lbs. |
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Cam sprocket bolts |
18-20 ft.-lbs. |
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Cam sprocket bolts |
20 ft.-lbs. |
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Harmonic damper bolt |
60 ft.-lbs. |
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Harmonic damper bolt |
85 ft.-lbs. |
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Flywheel/flexplate bolts |
65 ft.-lbs. |
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Flywheel/flexplate bolts |
60 ft.-lbs. |
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Pressure plate bolts |
35 ft.-lbs. |
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Pressure plate bolts |
35 ft.-lbs. |
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Bellhousing bolts |
25 ft.-lbs. |
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Bellhousing bolts |
25 ft.-lbs. |
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Exhaust manifold bolts |
25 ft.-lbs. |
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Exhaust manifold bolts |
20 ft.-lbs. |
Bolt Torque Spec Chart for Ford
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260, 289, 302 |
351W |
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Fastener Type |
Torque Spec |
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Fastener Type |
Torque Specs |
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Main cap bolts |
60-70 ft.-lbs. |
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Main cap bolts |
95-105 ft.-lbs. |
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Outer main cap bolts |
35-40 ft.-lbs. |
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Connecting rod bolts |
40-45 ft.-lbs. |
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Connecting rod bolts |
19-24 ft.-lbs. (40-45 ft.-lbs. for 289 HP Boss 302) |
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Cylinder head bolts |
90-100 ft.-lbs. |
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Cylinder head bolts |
65-72 ft.-lbs. |
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Rocker arms |
17-23 ft.-lbs. |
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Rocker arms |
17-23 ft.-lbs. |
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Intake manifold bolts |
23-25 ft.-lbs. |
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Intake manifold bolts |
23-25 ft.-lbs. |
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Oil pump bolt |
23-28 ft.-lbs. |
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Oil pump bolt |
23-28 ft.-lbs. |
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Cam bolts |
40-45 ft.-lbs. |
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Cam bolts |
40-45 ft.-lbs. |
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Cam thrust plate bolts |
8-10 ft.-lbs. |
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Cam thrust plate bolts |
8-10 ft.-lbs. |
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Harmonic damper bolt |
70-90 ft.-lbs. |
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Harmonic damper bolts |
70-90 ft.-lbs. |
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Flywheel/flexplate bolts |
75-85 ft.-lbs. |
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Flywheel/flexplate bolts |
75-85 ft.-lbs. |
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Pressure plate bolts |
35 ft.-lbs. |
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Pressure plate bolts |
35 ft.-lbs. |
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Front cover bolts |
12-15 ft.-lbs. |
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Front cover bolts |
12-15 ft.-lbs. |
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351C, 351M |
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Fastener Type |
Torque Spec |
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Main cap bolts |
95-105 ft.-lbs. |
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Connecting rod bolts |
40-45 ft.-lbs. (45-50 ft.-lbs. for Boss 351C) |
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Cylinder head bolts (follow factory torque sequence) |
105 ft.-lbs. (125 ft.-lbs. for Boss 351C) |
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Rocker arms (non-adjustable) |
18-22 ft.-lbs. |
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5/16 in. intake manifold bolts |
21-25 ft.-lbs. |
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3/8 in. intake manifold bolts |
28-33 ft.-lbs. |
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Oil pump bolt |
25 ft.-lbs. |
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Cam bolts |
40-45 ft.-lbs. |
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Cam thrust plate bolts |
9-12 ft.-lbs. |
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Harmonic damper bolt |
70-90 ft.-lbs. |
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Flywheel/flexplate bolts |
75-85 ft.-lbs. |
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Pressure plate bolts |
35 ft.-lbs. |
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Front cover bolts |
12-18 ft.-lbs. |
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429-460 |
360, 390, 406, 427, 428 FE |
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Fastener Type |
Torque Spec |
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Fastener Type |
Torque Spec |
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Maincap bolts |
95-105 ft.-lbs. |
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Main cap bolts |
95-105 ft.-lbs. |
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Connecting rod bolts |
40-45 ft.-lbs. |
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Crossbolts for 406 and 427 |
40 ft.-lbs. |
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Cylinder head bolts |
140 ft.-lbs. |
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Connecting rod bolts |
40-45 ft.-lbs. (53-58 ft.-lbs. for 406 and 427) |
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Rocker arms (non-adjustable) |
18-22 ft.-lbs. |
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Cylinder head bolts |
80-90 ft.-lbs. (100-110 ft.-lbs. for 1963-67 427) |
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Intake manifold bolts |
25-30 ft.-lbs. |
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Rocker arm shaft bolts |
40-45 ft.-lbs. |
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Oil pump bolt |
25 ft.-lbs. |
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Intake manifold bolts |
32-35 ft.-lbs. |
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Cam bolts |
40-45 ft.-lbs. |
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Oil pump bolt |
12-15 ft.-lbs. |
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Harmonic damper bolt |
70-90 ft.-lbs. |
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Cam bolts |
40-45 ft.-lbs. |
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Flywheel/flexplate bolts |
75-85 ft.-lbs. |
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Harmonic damper bolt |
70-90 ft.-lbs. |
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Pressure plate bolts |
35 ft.-lbs. |
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Flywheel/flexplate bolts |
75-85 ft.-lbs. |
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Front cover bolts |
12-18 ft.-lbs. |
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Pressure plate bolts |
35 ft.-lbs. |
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Front cover bolts |
12-15 ft.-lbs. |
Firing orders
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