Knock or crunch when turning the wheel
A knock or crunch when turning the wheel is a common symptom that usually indicates problems with the movable elements of the suspension or steering system. Ignoring this sound can lead to wheel jamming or loss of control on the road, so diagnosis should not be delayed.
Likely causes — most common first
Wear of the CV joint
This unit transmits torque to the wheels, and when the protective cover is damaged, dirt and sand get in. Due to this, when turning the wheel, a characteristic metallic crunch appears, which usually intensifies when driving with gas.
Faulty shock absorber bearing
The bearing at the top of the shock absorber provides free rotation of the shock absorber with the wheel. When moisture or lubricant gets inside, it starts to jam, creating a dry crunch or clicks under the hood.
Wear of the tie rod ends or links
The hinge connections of the steering trapezoid are damaged over time due to loads and potholes on the road. As a result, play appears, accompanied by a muffled knock during sharp turns of the wheel.
Steering rack problems
The internal mechanism of the rack wears out over time, forming gaps between the teeth of the shaft and gear. This causes a knock and backlash in the steering wheel during maneuvers on uneven roads.
Loosening of suspension or protection mounts
When driving on bumps, the bolts of the subframe, control arms, or metal protection of the engine can loosen. When tilting or turning, the parts shift and produce a characteristic metallic knock.
