The installation method for 2AR-FE engine ignition coil and spark plugs begins with a 16 mm spark plug wrench for positioning the 4 spark plugs before achieving 25 Nm (254 kgf-cm, 18 ft-lbf) of torque. You will mount the 4 ignition coils to their place by using 4 bolts. When tightening these fasteners, maintain a torque of 10 Nm (102 kgf-cm, 7 ft-lbf). Then, attach the 4 ignition coil connectors. You should complete installation of the No. 1 engine cover sub-assembly.