"Buick Trademark(s) used with the written permission of General Motors"
Use a reliable torque wrench to obtain the figures listed below. This will prevent straining or distorting the parts as well as preventing thread damage. These specifications are for clean and lightly lubricated threads only. Dry or dirty threads produce friction which prevents accurate measurement of the actual torque. It is important that these specifications be strictly observed. Over tightening can damage threads. This will prevent attainment of the proper torque and will require replacement of the damaged part.
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| Spark Plugs | 15 | |
| Crankshaft Bearing Caps to Cylinder Block | 110 | |
| Connecting Rods | 45 | |
| Cylinder Head to Cylinder Block | 100 | |
| Harmonic Balancer to Crankshaft | 200 Minimum | |
| Fan Driving Pulley to Harmonic Balancer | 23 | |
| Flywheel to Crankshaft (Auto. & Manual) | 60 | |
| Oil Pan Baffle to Cylinder Block | 455-13, 400/430-8 | |
| Oil Pan to Cylinder Block | 14 | |
| Oil Pan Drain Plug | 30 | |
| Oil Pump Cover to Timing Chain Cover | 10 | |
| Oil Pump Pressure Regulator Retainer | 455-35, 400/430-25 | |
| Oil Pick-Up Tube & Screen Housing Assembly to Oil Pump | 8 | |
| Oil Gallery Plugs | 25 | |
| Oil Pressure Switch to Cylinder Block | 455-23, 400/430-25 | |
| Oil Filter to Cylinder Block | 455-13, 400/430-12 | |
| Timing Chain Cover to Block | 455-29, 400/430-30 | |
| Water Pump Cover to Timing Chain Cover | 455-7, 400/430-8 | |
| Fan Driven Pulley | 20 | |
| Thermostat Housing to Intake Manifold | 20 | |
| Automatic Choke Cover to Intake Manifold | 8 | |
| Intake Manifold to Cylinder Head | 455-55, 400/430-50 | |
| Exhaust Manifold to Cylinder Head | 18 | |
| Carburetor to Intake Manifold | 455-13, 400/430-12 | |
| Fuel Pump to Cylinder Block | 20 | |
| Motor Mount to Cylinder Block | 455-63, 400/430-70 | |
| Fuel Pump Eccentric and Timing Chain Sprocket to Camshaft | 22 | |
| Rocker Arm Cover to Cylinder Head | 4 | |
| Rocker Arm Shaft to Cylinder Head | 455-25, 400/430-30 | |
| Delcotron Bracket to Cylinder Head | 35 | |
| Delcotron Adjusting Mounting Bracket to Cylinder Head | 455-35, 400/430-22 | |
| Delcotron Mounting Bracket Thru Delcotron to Cylinder Head at Pivot Location | 35 | |
| Starting Motor to Block | 35 | |
| Starting Motor Brace to Block | 11 | |
| Starting Motor Brace to Starter | 11 | |
| Distributor Hold-Down Clamp | 455-13, 400/430-12 | |
| Flywheel Housing to Cylinder Block | 35 | |
| Automatic Lower Flywheel Housing Plate | 4 |