312000775 - S027 REAR NOISE (WHISTLING/HUMMING)

Whilst driving, especially on unmade roads, there is a whistling noise coming from the rear suspension. This diagnosis can only be made after the.    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 back.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 complete with hub on the side where the noise is loudestOp. 4450C32 2. Move on to Step 1.
1	BRAKE DISC CHECK	All OK	Problems encountered	Operation
	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 3	1. Heat shield distorted.2. Contact between heat shield and disc.	1. Restore the correct gap/replace the guard2. Replacement of brake discOp. 3310B48 , if the noise persists, replace the wheel bearing complete with hub    Op. 4450D10 HUB FOR ONE REAR WHEEL, L/H OR R/H - R+R WITH WHEEL REMOVED - CHECK WHEEL GEOMETRY SEPARATELY
2	SHOCK ABSORBER STEM CHECK	All OK	Problems encountered	Operation
	Remove the wheel and 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. 4420A30 REAR SUSPENSION SHOCK ABSORBER (ONE), LEFT OR RIGHT - R.R. - CHECK WHEEL GEOMETRY SEPARATELY