When the front suspension strut or coil springs have any signs of wear, i.e. leaking fluid, loss of damping ability, sagging or cracked coil springs etc., then they should be disassembled and overhauled accordingly, with the struts being replaced when defective and springs and associated parts being replaced separately so as to ensure an equal amount of characteristics on each side of the vehicle. Once the assembly is out of the vehicle, wipe off all the dirt on the outside and place it in a vise. Attach the tools of coil spring compressor and compress the spring until the upper mount releases all its tension. Use an Allen key to remove the strut piston rod and a box-end wrench to remove the nut securing the thrust bearing and then remove the top mount, upper spring seat, spring, boot, bearing and bump stop. When a new spring is required, be careful when removing the old spring out of the compressor; when re-using, it is not necessary to remove it out of the compressor. All the strut components should be checked to determine whether it is worn out and damaged and all the strut components should be repaired or replaced with some parts as needed with the strut assembly fully disassembled. Check the strut leakage, examine the pitting on the piston rod, and examine the damage or non-damage of the strut body. Test the operation of the strut by swinging the piston in long and short strokes, making sure of smooth and continuous resistance; a sudden or irregular resistance or wear visible on the strut is enough evidence of wear to get a replacement. The process of reassembly is the opposite of disassembly, where the coil springs should be fitted with the paint mark at the bottom, and the ends of the coil springs fit into the upper and lower seats correctly before the compressor is released and the piston rod nut tightened to the recommended torque.