Acura 51401-S3V-A06 Front Coil Spring

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If your struts or coil springs show wear, consider all options before starting work. Strut assemblies can't be serviced and must be replaced if faulty. You may find complete strut assemblies on an exchange basis, saving time and effort. Before disassembly, check part costs and availability. Remove the strut and spring assembly, mount it in a vise, and use a spring compressor to relieve pressure. Unscrew the thrust bearing retaining nut and remove the upper mount. Inspect the bearing and rubber mount for damage and replace if needed. Remove the upper spring seat and insulator, checking for damage. Lift the compressed spring from the assembly. Remove the dust cover plate and dust cover, then slide off the rubber bump stop and check for deterioration. To reassemble, extend the damper rod and install the rubber bump stop, dust cover, and dust cover plate. Place the compressed coil spring onto the lower seat of the damper, install the upper insulator and spring seat, followed by the bearing and suspension support. Install the washer and nut, tighten it, remove the spring compressor tool and install the strut/spring assembly.

Loosen the wheel lug nuts, raise the vehicle and support it securely on jack stands. Block the front wheels to prevent the vehicle from rolling. Remove the wheel. On 2007 Acura MDX models, remove the rubber hangers from each side of the muffler. Remove the stabilizer bar link from the lower arm B. Support the lower arm B with a floor jack placed under the coil spring pocket. Remove the ABS wheel speed sensor harness from the lower arm B. Mark the position of the spring to the spring insulators. On 2007 Acura MDX models, remove the lower shock absorber mounting bolt. Remove the bolt securing the lower arm B to the knuckle. Slowly lower the floor jack and remove the coil spring. Check the spring for cracks and chips, replacing the springs as a set if any defects are found. Also check the upper insulator for damage and deterioration, replacing it if necessary. Installation is the reverse of removal, noting the following points: Be sure to position the lower end of the coil spring in the depressed area of the trailing arm. Raise the outer end of lower arm B with a floor jack to simulate normal ride height, then tighten the control arm-to-knuckle bolt to the torque. Tighten the wheel lug nuts to the torque.