030 and using a 300 crank the displacement becomes 266 cubic inches. The Buick-Olds and Rover 3.5 Aluminum V-8πs can be increased in displacement relatively inexpensively by installing a Buick 300 crankshaft. Once correct, reinstall the connecting rods onto the crankshaft and tighten according to the manufacturer's connecting rod torque specs.INCREASING the DISPLACEMENT of the BUICK OLDS 215Īnd the ROVER 3.5 TO 4.6 LTR. Remove the the rod from the crank and and check the Plastigauge to confirm correct clearance and tolerances. Next, tighten the rod bolts with Plastigauge installed. Correct size rod bearings must be installed into the cap and rod. The connecting rod should have the matching cap and correct cap orientation for assembly. Once you have installed the assembled connecting rods and pistons through the engine block bores, the next step is installing the connecting rods to the crankshaft stroke sections. How To Install Connecting Rods To Crankshaft.The connecting rod needs to be strong enough to handle the downward force of the piston during combustion as well as the force against the crankshaft at the rod journal.Īn engine connecting rod length is determined by measuring the distance between the center points of the piston pin bore and the crankshaft journal bore. This allows the piston to continue to move up and down while the rod moves with the rotation of the crankshaft.
However, on each end are pivot points with bearings where it attaches to the crank and a pin where it attaches to the piston. H-Beam Connecting Rods are a little bit heavier, stiffer, more rigid and stronger than I-Beam, so they are the priority selection for high horsepower and high cylinder pressures.Ī connecting rod links the piston to the crankshaft. Connecting rods are commonly made from cast aluminum alloy and are designed to withstand dynamic stresses from combustion and piston movement. A connecting rod is an engine component that transfers motion from the piston to the crankshaft and functions as a lever arm.
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