Chevrolet began producing its small-block engines in 1955 with the 4.3 liter, the most common of which is the 5.7 liter. This engine was placed in station wagons to sports cars, in commercial vehicles, in boats and in airplanes. GM produces three engines that qualify as 5.7 liter engines: one that displaces 350 cubic inches, one that displaces 354 cubic inches, and one that displaces 346 cubic inches.
In the 346-cubic-inch-displacement engine, the crankshaft bolts to the engine block with 15 foot-pounds of torque. The cylinder head bolts require 22 foot-pounds of torque to join to the engine block. The exhaust manifold requires 18 foot-pounds and the intake manifold requires 7.42 foot-pounds to bolt to the cylinder head. The oil-pan-to-engine-block bolts screw to 18 foot-pounds. To prevent leaks, the plug bolts to the oil pan with 6.67 foot-pounds of torque.
In the 350-CID engine, the crankshaft requires three steps to bolt to the engine block: first to 25 foot-pounds, then to 50 foot-pounds, finally to 75 foot-pounds of torque for the inner bolts; the outer bolts on the four-bolt cap of the crankshaft bolt to 65 foot-pounds of torque. The exhaust manifold requires 20 foot-pounds and the intake manifold requires 33 foot-pounds of torque to join to the cylinder head. The oil pan joins to the engine block with 13.5 foot-pounds of torque. The valve-cover-to-cylinder-head bolts require 5 foot-pounds of torque. The drain plug bolts to the oil pan with 20 foot-pounds of torque.
In the 354-CID engine, the rear main cap bolt screws to the engine block with 120 foot-pounds of torque, while all other bolts joining the crankshaft to the engine block require 100 foot-pounds of torque. The four end bolts of the cylinder head require 100 foot-pounds of torque to join to the engine block, and all other bolts joining the cylinder head with the engine block require 95 foot-pounds. Both the intake manifold and the exhaust manifold join to the cylinder head with 40 foot-pounds of torque. The oil-pan-to-engine-block bolts require 12 foot-pounds of torque. The drain plug bolts screw to the oil pan with 22 foot-pounds of torque.
