Then attach the rods to the pistons and insert the wristpin. Be sure to arrange them so that four are for the left bank, and four are for the right. Looking down into the cylinder bore to locate where the connecting rod will rest on the crankshaft, determine which direction the rod should face. Each rod has one flat face and one chamfered face; the flat face opposes the other rod, while the chamfered face opposes the crankshaft. This is especially important because the wristpin cannot be removed after the rings are installed.