Audi Audi TT 1998-2006 Suspension Bolt Torque Specifications

Using the correct torque specifications ensures proper clamping force, which is crucial for the structural integrity of the suspension system and the safety of the vehicle. Under-torquing can lead to bolts loosening and components shifting, resulting in poor handling, noise, and premature wear. Over-torquing can stretch or break bolts, damage components, and make future removal difficult, as well as weakening the bolt.

Generally, it is recommended to replace certain types of suspension bolts, particularly torque-to-yield (TTY) bolts, whenever they are loosened. These bolts stretch upon tightening and may not maintain their clamping force if reused. Failure to replace a TTY bolt could result in failure of the connection. Always refer to the manufacturer’s service manual for specific recommendations. In general, standard nuts and bolts can be reused if they are in good condition (no visible damage) but its better to replace them especially after a certain age/use. When in doubt, replace hardware.

You will need a torque wrench with an appropriate torque range for the specifications. A socket set that fits the bolts, and possibly extensions and adaptors. For some bolts, you may need a crows foot or similar tool to accurately torque the bolt. Ensure that your tools are accurate and in good working condition. Use a torque wrench calibrated within the last year for the most accurate results. A good set of wrenches is recommended to hold nuts in place while torquing the corresponding bolt. Some fasteners may require the use of thread locker.

It's a good practice to check the torque on your suspension bolts after any suspension work or after experiencing significant impacts or harsh driving. The frequency of regular checks depends on driving conditions and mileage, but it is advisable to check the torques every year, especially on vehicles regularly subjected to harsh conditions, or higher performance use. If you start hearing clunking noises, that may indicate loose suspension fasteners.

Newton-meters (Nm) and foot-pounds (ft-lbs) are both units of torque, but they represent different measurement systems. Nm is the metric unit, and ft-lbs is the imperial unit. Manufacturers typically specify torque specifications in one unit or the other. There are conversion tools to switch between the units for reference. Incorrectly applying these numbers to your torque wrench may result in improper tightening, or damage to components. For instance, if you mistakenly use a specification intended for Nm as ft-lbs (or vice-versa), you could damage the components and put yourself in danger.