Connecting Rod: Description and Operation

DESCRIPTION





Flat-topped aluminum pistons (3 and 6) have machined pockets for valve clearance and asymmetrical skirts for low-temperature noise control. The pistons are formed from a special aluminum alloy to cope with the high temperatures created by dual ignition. In addition, the upper portions are hard anodized to protect the top ring. For optimal wear protection, the piston skirts receive an iron coating. Three, low-tension piston rings provide compression control with low oil consumption. Forged steel connecting rods (8) and crankshaft provide requisite strength with light weight. Connecting rods are forged in one piece from steel, and cracked rather than machined along the split line, providing a perfect fit for the two halves and reducing weight by 20 percent compared to a fully machined rod and cap while also greatly reducing machining. The rods are drilled longitudinally to deliver oil under pressure to the wrist pins (2 and 5), minimizing wear for long life.