Wheel Bolts, Tightening Correctly
To ensure the secure fit of the wheel bolts:
The ball bearing surfaces of the wheel bolts must be free of grease and clean.
The ball bearing surfaces of the wheel bolts must "not be greased or oiled".
Use the correct wheel bolts.
Depending on the model, the wheel bolts have different lengths and different ball bearing surfaces. Refer to the Parts Information.
Tighten all-wheel bolts to the right tightening specification. Refer to WHEEL BOLT TIGHTENING SPECIFICATIONS .
Pay attention to the following information:
To install-wheel bolts correctly, follow the sequence and instructions below.
Do "not" use an impact wrench to install the wheel bolts.
- Before mounting a wheel, carefully clean all rim contact surfaces for the wheel hub, the wheel hub and the surfaces for the wheel bolts on the rim.
- Before installing the wheel bolts, carefully clean the thread and the spherical cap contact surfaces.
- Apply the Optimol paste to the threads on the wheel bolts. Refer to the Parts Information.
- The ball bearing surfaces of the wheel bolts must be free of grease and clean.
- Do "not" use an impact screwdriver or impact wrench to insert the wheel bolts.
- Install all-wheel bolts in a diagonal sequence until the wheel is seated securely on the wheel hub. Only then can the vehicle be placed on the ground.
- Place the vehicle on the ground.
- Use a wrench that is the correct size for the vehicle when tightening the wheel bolts to the specification.
- Set the required tightening specification on the torque wrench.
- Tighten all-wheel bolts in a diagonal sequence to the tightening specification when the vehicle is stationary on the ground.
- Check each wheel bolt with the torque wrench set to the correct tightening specification at least once.
- By checking the torque, make sure "all" wheel bolts on "all" wheels are tightened to the required specification.
After achieving and checking the correct torque on "all-wheel bolts", install the caps completely and securely on all-wheel bolts.
Use the back of a screwdriver or a suitable tool to do this. Do not damage the cap.