If the front tires are clearly heavily worn, it is recommended to swap the front wheels with the rear ones. As a result, all 4 wheels will have approximately the same service life.
Safety instructions: Do not replace tyres individually, or at least replace both tyres on one axle at once. Always install tyres with a deeper tread pattern on the front axle. Only install tyres of the same size and design on the front and rear axles, and, if possible, from the same manufacturer and with the same tread pattern.
Before removing the wheel, mark its position on the hub with chalk or a felt-tip pen. This will allow you to install the wheel in its original position during installation.
Loosen the wheel nuts only when the car is standing on its wheels. Before loosening the nuts, apply the handbrake or engage 1st gear so that the car cannot move.
Note: Light alloy rims are protected against corrosion by a clear varnish. When replacing wheels, be careful not to damage the protective layer, otherwise the protective coating must be restored.
To protect against deep corrosion, the seat of the disc wheel, both at the front and at the rear, must be lightly treated with plastic grease for rolling bearings each time the corresponding wheel is removed.
Clean dirty wheel nuts and threads. Do not lubricate the nut threads.
Tighten the wheel nuts in a crisscross pattern in several steps. A torque wrench should always be used to tighten the wheel nuts. This ensures that the wheel nuts are tightened evenly and firmly. The tightening torque for all wheel nuts is 100 Nm.
Caution: If the wheel nuts are tightened one-sidedly or unevenly, increased stress may occur in the wheel and/or wheel hub.
Wheel balancing
Mass-produced wheels are balanced at the factory. Balancing is necessary to compensate for uneven weight distribution and inaccuracies in the material used to manufacture the wheels.
During operation, the imbalance becomes noticeable due to the occurrence of vibrations and angular oscillations of the vehicle's axle in the transverse plane. At the same time, the steering wheel begins to shake at high speed.
Typically, vibration occurs within a certain range of driving speeds and stops again at lower or higher vehicle speeds. Over time, such imbalance phenomena can lead to damage to suspension joints, steering gear, and shock absorbers.
Wheels must be balanced after each tire repair, since as a result of wear and tear and after repair, the distribution of masses and material changes, which causes a division of imbalance.
(This article is a copy from the website: fordbook)