312000771 - S017 FRONT SUSPENSION NOISE (WHISTLING/HUMMING)

Whilst driving, especially on unmade roads, there is a whistling noise coming from the front suspension. This diagnosis can only be made after    See table S015 NOISE WHILST DRIVINGCarry out the latter first.

If the problem is only on one side, carry out the checks and any operations on the appropriate side only.

		Test results
0	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
	Having carried out the road test, during the    See table S015 NOISE WHILST DRIVING, there was a whistling noise from the front.Continue depending on the circumstances in which the noise occurs.	End of diagnosis	1. The noise increases when cornering2. The noise increases in vertical oscillation conditions.	1. Replace the wheel bearing on the side where the noise is loudestOp. 4450C32 fitting it with the magnetic track facing the steering knuckle seal This bearing is used by the ABS active sensors to calculate the wheel speed. It should NEVER come into contact with metal shavings because they could alter the gap and prevent a correct reading from the sensor 2. Move on to Step 1
1	BRAKE DISC CHECK	All OK	Problems encountered	Operation
	Check that the gap between the brake disc and the steel shield is sufficient.	Move on to Step 2	Gap too small	Restore the correct gap
2	SHOCK ABSORBER STEM CHECK	All OK	Problems encountered	Operation
	When the wheel is removed check that the noise is not due to irregular friction between the shock absorber stem and the gasket, checking the condition of the stem chrome surface.	End of diagnosis	There is irregular friction.	Lubricate the stem raising the dust cover, using a layer of silicon grease.If the noise persists, 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