Oldsmobile 560328 Pulley Assembly, (3 Groove 7.320 Pd)

This procedure applies solely to three point three liter V6 engines and can be used to check both vibration in the harmonic balancer and balance any problems. To know the frequency at which a vibration takes place, use a tachometer at theplace where the vibration is observed. Lay a small amount of body putty or a similar material to the internal periphery of the fan driving pulley, then rev up the engine to the speed that has been mentioned and check whether the vibration still exist. For the next attempts use different amount of putty and carry out the same procedure when the degree of vibration is experienced. When possible vibration is considerably reduced or quasi eliminated, the next operation is to mark the hole drilled in the balancer which is nearest to the putty. Take an iron rod of, for instance, a certain length and with the help of the chisel, remove a small quantity of material from one side of the rod piece. Screw in the rod piece on the previously selected hole and in the process if the vibration persists put in more pieces of rod in the balancer.