323001370 - 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	ACTION
	Having carried out the road test    See table S015 NOISE WHILST DRIVINGthere 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 cornering.2. The noise increases in vertical oscillation conditions.	1. Replace the wheel bearing on the side where the fault occurred    Op. 4450C32 ONE FRONT WHEEL HUB BEARING, LH OR RH - REPLACE 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	ACTION
	Check for any distortion to the disc heat shield.Turn the wheel assembly to check for noise caused by contact between disc and heat shield.	Move on to Step 2.	1. Heat shield distorted.2. Contact between heat shield and disc.	1. Restore the correct gap and replace the guard if necessary.    Op. 3310A59 FRONT BRAKE DISC GUARD (ONE), LEFT OR RIGHT- R.R 2. Replace the brake disc    Op. 3310A48 FRONT BRAKE DISC (ONE), LEFT OR RIGHT - R.R if noise persists, replace the wheel bearing    Op. 4450C32 ONE FRONT WHEEL HUB BEARING, LH OR RH - REPLACE
2	SHOCK ABSORBER STEM CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Remove the left wheel    Op. 4450B02 LEFT FRONT WHEEL - R.R     Op. 4450B04 RIGHT FRONT WHEEL - R.R Check that the noise is not due to irregular friction between the shock absorber stem and the gasket, checking the condition (scoring/contact marks) 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