13 How big are the two screws of Cruze timing belt box?

13 The two screws and wrenches of the Cruze timing belt box are 12 and 15 respectively. According to relevant public information, one special tool for Cruze timing belt is 12 to fix the crankshaft and the other is 15 to fix the camshaft. The main function of the engine timing belt is to drive the valve train of the engine to open or close the intake and exhaust valves of the engine at a proper time, so as to ensure that the engine cylinders can normally inhale and exhaust.