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Buick 400 - 430 - 455
Factory Bolt Torque Specifications

Lb. Ft.
Crankshaft Main Bearing Caps to Cylinder Block
110
Connecting Rods
45
Oil Pickup Tube to Cylinder Block
8
Oil Pan Baffle to Cylinder Block
13
Oil Gallery Plugs
25
Oil Pressure Switch to Cylinder Block
23
Starter Motor to Engine Block
35
Motor Mount to Cylinder Block
63
Harmonic Balancer to Cylinder Block
200 Minimum
Fan Driving Pully to Harmonic Balancer
23
Flywheel/ Flexplate to Crankshaft
58
Oil Pan to Cylinder Block
14
Oil Pan Drain Plug
30
Front Cover to Block
29
Water Pump to Front Cover
7
Fan Driven Pulley
20
Oil Pump Cover to Front Cover
10
Oil Pump Pressure Regulator Retainer
35
Fuel Pump to Front Cover
20
Timing Chain Sproket to Camshaft
22
Distributor Hold-Down Clamp
4
Cylinder Heads to Cylinder Block
100
Spark Plugs
15
Valve Cover to Cylinder Head
4
Rocker Shaft to Cylinder Head
25
Intake Manifold to Cylinder Head
65
Thermostat Housing to Intake Manifold
20
Choke Cover to Intake Manifold
8
Carburetor to Intake Manifold
13
Exhaust manifold to Cylinder Head
18
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