Nissan 300zx 90-96 Z32 OEM Crank Woodruff Key The Nissan 300zx OEM Crank Woodruff Key is what holds the crank timing sprocket and the crank pulley in place. These crank woodruff keys sometimes get worn or misplaced and it is a good idea to replace them when rebuilding your car. There are two crank woodruff keys on the 300zx. SOLD INDIVIDUALLY