Before dismantling the coil spring assembly, one has to take off the spring lower seat in the radius arm of the 2WD models or to take off the bolt/nut of the radius arm to the front axle and front bracket, and also two bolts for the radius arm to the front bracket for the earlier model. In the case of 4WD models, it is necessary to remove the spring lower seat as well as the stud, and after that, the bolts which attach the radius arm to the front axle bracket. Subsequently, from the rear side of the radius arm bracket, or from the outside of the automobile, remove the nut, rear washer, the shield which is only applicable to the shield side, and the insulator before pulling out the radius arm together with the inner insulator and the retainer from the threaded side. To install the radius arm insert the front end of the radius arm to the front axle of the vehicle as described above. For 2WD models, there is the attaching bolt which has to be fitted together with a new nut from beneath the axle; the nut at this stage should only be tightened by hand. In the 4WD models, place the front end of the radius arm on the bracket and axle and then screw in the bolts and stud (with a washer only on the left axle) in the bracket but only to the extent of being hand tight. Then please put the rear retainer and the insulator onto the thread end of the radius arm and then placing the radius arm into the bracket then put the insulator washer and new nut then tightening nut to the torque stated. Last of all, make tight the bolts and nuts which are fitted earlier to required torque, and for 2WD model fit the spring lower seat on the radius arm and for 4WD model fit the spring lower seat and insulator on the left radius arm and then fit the spring assembly.