Having carried out the road test during the See table S15 RUMOROSITA in condizioni di marcia, a knocking noise is heard coming from the front.

Continue depending on the circumstances in which the noise occurs

Replace the wheel bearing on the side that the problem occurs Op. 4450C32, positioning it with the magnetic race towards the vehicle exterior

Warning: This bearing is used by the ABS active sensors to calculate the wheel speed. It should NEVER come into contact with metal shavings because this could adversely affect the gap and prevent the sensor giving a correct reading

Raise the vehicle on a two collumn lift and check that there are no oil leaks from the shock absorber stem

Slight dampness of the stem is considered normal because there is evaporation that takes place during the operation of the shock absorber. If there is a consistent oil leak at the shock absorber stem, make sure that it is not coming from other parts of the vehicle that are lubricated

Check that there are no signs of interference between the suspension elements or between the latter and the bodyshell.

In particular, check that there are no signs of wear at the suspension springs and that they do not suffer from abrasions

If the spring shows signs of abrasions, its mechanical properties could be adversely affected as a result of oxidation

Check that there is no clearance between the track control rod ends and that the bush is intact

To do this it it necessary to remove the guard under the engine Op. 7055B54, then loosen the bolt connecting the track control arm to the front steering knuckle

Also check the condition of the suspension bushes

Locate the area that is the possible source of the noise: top or bottom.

Starting from the area where the knocking was located, check See Test 4410A Verifiche corretti serraggi sospensioni anteriori

The tightening torques of the bolts fixing the:

• Mountings
• Bushes
• Track control arms
• Steering knuckles
• Anti-roll bar