Having carried out the road test, see the Table

See table S015 NOISE WHILST DRIVING

there was a knocking noise from the front.

Continue depending on the circumstances in which the noise occurs

Restore the correct tightening of the front brake calipers to the steering knuckle

Op. 3310A30 FRONT BRAKE CALIPER (ONE) - R.R

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

The check on the shock absorber should only be carried out after driving on a dry road, slight dampness of the stem is considered normal since this is due to evaporation that takes place during the operation of the shock absorber.

If there is persistently oil on the shock absorber stem, make sure that it is not coming from other parts of the vehicle that are lubricated

Replace the shock absorber

Op. 4410A12 FRONT SUSPENSION DAMPER (ONE), LH OR RH - FOR MCPHERSON STRUT SYSTEM - INCLUDES DISMANTLING/REASSEMBLY OF ASSEMBLY AT BENCH - R.R

Raise the vehicle on a two column lift and rotate the front wheels by hand.

Make sure that there are no impediments to the movement or noise during rotation.

Replace the constant velocity joint

Op. 2710A20 WHEEL SIDE CONSTANT VELOCITY JOINT (ONE), L/H OR R/H - R + R WITH DRIVESHAFT REMOVED - INCLUDES BOOT REPLACEMENT

Restore correct tightening of gearbox side support

Op. 1008A42 POWER UNIT RIGID SUPPORT - GEARBOX SIDE - R.R.

and engine side support

Op. 1008A46 POWER UNIT RIGID SUPPORT - TIMING SIDE - R.R.

Replace the constant velocity joint

Op. 2710A24 DIFFERENTIAL SIDE CONSTANT VELOCITY JOINT (ONE) L/H OR R/H - R + R WITH DRIVE SHAFT REMOVED - INCLUDES BOOT REPLACEMENT

Replace the constant velocity joint

Op. 2710A20 WHEEL SIDE CONSTANT VELOCITY JOINT (ONE), L/H OR R/H - R + R WITH DRIVESHAFT REMOVED - INCLUDES BOOT REPLACEMENT

Replace the constant velocity joint

Op. 2710A20 WHEEL SIDE CONSTANT VELOCITY JOINT (ONE), L/H OR R/H - R + R WITH DRIVESHAFT REMOVED - INCLUDES BOOT REPLACEMENT

Check the condition of the wheel side boot.

If it is not intact, check that there are no leaks or no grease in the actual boot.

If everything is okay and the noise was more pronounced whilst steering, check the wheel bearings.

Replace the boot

Op. 2710A20 WHEEL SIDE CONSTANT VELOCITY JOINT (ONE), L/H OR R/H - R + R WITH DRIVESHAFT REMOVED - INCLUDES BOOT REPLACEMENT

Replace the wheel bearing

Op. 4450C28 FRONT WHEEL HUB,LEFT OR RIGHT - R.R WITH WHEEL REMOVED, CHECK WHEEL GEOMETRY SEPARATELY

on the side where the problem occurs, positioning it with the magnetic race towards the steering knuckle ring.

Replace the boot

Op. 2710A24 DIFFERENTIAL SIDE CONSTANT VELOCITY JOINT (ONE) L/H OR R/H - R + R WITH DRIVE SHAFT REMOVED - INCLUDES BOOT REPLACEMENT

Remove the left wheel

Op. 4450B02 LEFT FRONT WHEEL - R.R

and/or the right one

Op. 4450B04 RIGHT FRONT WHEEL - R.R

Check that the constant velocity joint fastening nut is tightened and that the staking is in place.

Replace the nut, restore the torque tightening and stake

Op. 2710A20 WHEEL SIDE CONSTANT VELOCITY JOINT (ONE), L/H OR R/H - R + R WITH DRIVESHAFT REMOVED - INCLUDES BOOT REPLACEMENT

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

Also check that there are no signs of interference between the lower track control arm and the shock absorber fork due to damage/partial removal of the bush.

In particular, check that there are no signs of wear on the suspension springs and that they do not show signs of abrasion.

If the spring shows signs of abrasion, its mechanical properties could be weakened as a result of oxidation.

Replace the spring

Op. 4410A12 FRONT SUSPENSION DAMPER (ONE), LH OR RH - FOR MCPHERSON STRUT SYSTEM - INCLUDES DISMANTLING/REASSEMBLY OF ASSEMBLY AT BENCH - R.R

taking care to fit it correctly

Check that there is not excessive clearance at the track rod end connected to the steering knuckle.

In order to carry out this operation the guard under the engine must be removed

Op. 7055B54 UNDER ENGINE PROTECTION/GUARD - R.R.

and disconnect the bolt connecting it to the front steering knuckle

Check for possible contact (abrasion) between the lower arm and the seats in the chassis.

Also check the condition of the front bush at the mounting between the chassis and the lower track control arm.

Replace the lower track control arm

Op. 4410B40 LOWER TRACK CONTROL ARM (WITH BALLJOINT) FOR LEFT OR RIGHT FRONT SUSPENSION (ONE) - R+R - CHECK WHEEL GEOMETRY SEPARATELY

Replace the lower track control arm

Op. 4410B40 LOWER TRACK CONTROL ARM (WITH BALLJOINT) FOR LEFT OR RIGHT FRONT SUSPENSION (ONE) - R+R - CHECK WHEEL GEOMETRY SEPARATELY

Replace the lower track control arm

Op. 4410B40 LOWER TRACK CONTROL ARM (WITH BALLJOINT) FOR LEFT OR RIGHT FRONT SUSPENSION (ONE) - R+R - CHECK WHEEL GEOMETRY SEPARATELY

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

Starting from the area where the knocking was identified, check

See Test 4410OA CHECKING CORRECT TIGHTENING OF FRONT SUSPENSION

the tightening torques of the non-yield point type fixing bolts:

- the shock absorber stem fastening to the mounting;

- the fastening of shock absorber mounting to the bodyshell;

- the fastening of the shock absorber to the fork;

- the fastening of lower/upper end of the connecting rod for shock absorber fork anti-roll bar;

- the fastening of the shock absorber fork to the lower track control arm;

- the fastening of the track control arm to the steering knuckle;

- the fastening between steering box rod and the steering knuckle;

- the front fastening of the U-bolt securing the anti-roll bar to the engine frame;

- the fastening of the vertical bracket to the engine frame and the bodyshell;

- the fastening of the upper track control arm to the steering knuckle;

- the fastening of brake caliper to the steering knuckle;

- the fastening of the brake disc shield;

Visually inspect that the yield point type bolts have not loosened, the list is given below:

- the fastening of the steering box to the engine frame;

- the rear fastening of the U-bolt securing the anti-roll bar to the engine frame;

- the front/rear bushes securing the lower track control arm to the engine frame;

- the fastening of the upper track control arm to the bodyshell;

- the front/centre/rear fastening of the engine frame to the bodyshell;

- the fastening of the engine side engine connecting rod to the chassis;

- the fastening of the gearbox side engine connecting rod to the chassis.

Check, following the

See Test 4410CA CHECKS ON STABILIZER BAR

after having disconnected the upper track rod end for the shock absorber fork connecting rod, that the anti-roll bar does not come down quickly.

Also check that there is not excessive clearance for the pins connected to the bar and to the shock absorber fork.

Replace the anti-roll bar

Op. 4410C10 FRONT SUSPENSION ANTI-ROLL BAR - R+R - CHECK WHEEL GEOMETRY SEPARATELY

Replace the connecting rod

Op. 4410C12 FRONT SUSPENSION ANTI ROLL BAR JOINT (END) (ONE), LH OR RH - R.R

Check that there is no clearance between the track control arm track rod ends and make sure that the boot is intact.

The bolt connecting the track control arm to the steering knuckle must be loosened in order to carry out this operation.

Also check the condition of the track control arm bushes.

Check for the presence of and condition of the upper/lower spring shims. Remove the shock absorber

Op. 4410A12 FRONT SUSPENSION DAMPER (ONE), LH OR RH - FOR MCPHERSON STRUT SYSTEM - INCLUDES DISMANTLING/REASSEMBLY OF ASSEMBLY AT BENCH - R.R

checking that the shock absorber reaction to a manual load is correct.

Replace the shock absorber

Op. 4410A12 FRONT SUSPENSION DAMPER (ONE), LH OR RH - FOR MCPHERSON STRUT SYSTEM - INCLUDES DISMANTLING/REASSEMBLY OF ASSEMBLY AT BENCH - R.R