Cadillac ELR 2014-2016 Suspension Bolt Torque Specifications

Using the correct torque ensures that suspension components are securely fastened, preventing premature wear, component failure, and maintaining proper alignment. Over-torquing can damage threads or deform components; under-torquing can lead to loosening and potential safety hazards. For example, if a lower control arm bolt is under-torqued, it could work loose, causing the wheel to shift and potentially resulting in a loss of control. Similarly, over-torquing a strut bolt could cause it to snap or stretch.

A properly calibrated torque wrench is essential. For smaller bolts, a 3/8" drive torque wrench is usually sufficient, while larger bolts may require a 1/2" drive torque wrench. You will also need appropriate sockets for each bolt head, and potentially extensions or universal joints to access hard-to-reach bolts. Always consult the vehicle's service manual for specific torque wrench settings and socket sizes. Never rely on feel.

While not always necessary, many suspension bolts are designed to be 'one-time use' or 'torque-to-yield'. These bolts are designed to stretch upon tightening and should be replaced after removal. Check the manufacturer's recommendation in the service manual. It is best practice to replace any self-locking nuts or bolts that show signs of damage, rust, or wear. This is critical for ensuring proper clamping force is maintained. For example, reusing a torque-to-yield strut bolt is risky as it may have already stretched beyond its intended specifications which may cause it to fail.

Generally, you should NOT lubricate suspension bolts unless specifically directed to do so in the service manual. Lubrication can alter the friction between the bolt and the mating surface, leading to inaccurate torque readings and possibly over-torquing. Most torque specs are based on a dry, clean bolt. However, some bolts might require anti-seize compound; always refer to your service manual. For example, some control arm bolts might specify a specific torque with thread locker applied, where the thread locker itself provides the friction properties needed.

It's recommended to check suspension bolt torque after major repairs or modifications, and then periodically, perhaps every 10,000-15,000 miles or annually. Road conditions and driving style can affect how quickly bolts might loosen. If you notice unusual clunking or handling issues, inspect the suspension and check the torque of the bolts. As an example, after replacing a tie rod end it's good to check the alignment and the torque after about 100 miles of driving.