A: To remove the coil spring and jounce bumper, start by loosening the wheel lug nuts and raising the vehicle with jackstands. Support the lower Control Arm with a floor jack and detach the stabilizer bar link if necessary. Remove the lower control arm-to-knuckle nut and bolt, as well as the upper control arm-to-lower control arm link bolt. Slowly lower the floor jack to fully extend the coil spring, then remove it along with the jounce bumper from the suspension arms. Inspect the spring seat, jounce bumper, and coil spring for wear and damage, replacing any necessary parts. To install, reverse the removal steps and use new fasteners. Raise the lower control arm with the floor jack to simulate normal ride height, then tighten all fasteners to the specified torque. Finally, install the wheel and lug nuts, lower the vehicle, and tighten the lug nuts to the specified torque.
Q: How to disassemble and reassemble a strut and coil spring assembly on Buick LaCrosse?
A: Before working on worn struts or coil springs, consider replacement options. Check part availability and cost before disassembling the vehicle. To disassemble, remove and mount the assembly in a vise. Use a spring compressor to relieve pressure and unscrew the damper shaft nut. Check rubber parts for wear and replace them if needed. Carefully set aside the compressed spring. To reassemble, extend the damper rod and install the rubber bump stop and dust boot, then place the compressed coil spring onto the lower seat of the damper. Install the upper insulator, spring seat, and upper mount, tightening to the specified torque. Remove the spring compressor tool and install the assembly.