23 · Diagnostics

Rear noise (whistling/humming)

Make: Alfa Romeo
Model: Brera and Spider Factory Service Manual
Year: 2005–2010
Section: Noise / vibrations › Rear noise (whistling/humming)

‹ Prev Rear noise (creaking/squeaking/ticking)Next › Rear noise (knocking)

Fault diagnosisRear noise (whistling/humming)

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

See table S015 NOISE WHILST DRIVING

Carry out the latter first.

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

0	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
		Test results
	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	The noise increases when cornering.	Move on to Step 1.
		End of diagnosis	The noise increases in vertical oscillation conditions.	Move on to Step 2.
1	CHECKS ON THE WHEEL HUB	All OK	Problems encountered	Operation
	Visually inspect that the yield point type bolts fixing the bearing to the steering knuckle have not loosened. Also check for the presence of grease on the wheel hub.	Move on to Step 2	Yield point type tightenings loosened	Replace the shear bolts and restore the correct tightness
		Move on to Step 2	Presence of grease on the wheel hub.	Replace the wheel bearing complete with hub on the side where the noise is loudest Op. 4450C28 FRONT WHEEL HUB,LEFT OR RIGHT - R.R WITH WHEEL REMOVED, CHECK WHEEL GEOMETRY SEPARATELY 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	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 due to contact between disc and heat shield.	Move on to Step 3	Heat shield deformed.	Restore the correct gap/replace the guard Op. 3310B59 REAR BRAKE DISC GUARD (ONE), LEFT OR RIGHT - R.R.
		Move on to Step 3	Contact between heat shield and disc.	Replacement of brake disc Op. 3310B48 REAR BRAKE DISC (ONE), LEFT OR RIGHT - R.R. 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
3	SHOCK ABSORBER STEM CHECK	All OK	Problems encountered	Operation
	Remove the left and/or right wheel. 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 with a layer of silicon grease. If the noise persists, replace the shock absorber Op. 4420A12 REAR SUSPENSION DAMPER (ONE), LH OR RH - FOR MCPHERSON STRUT SYSTEM - INCLUDES DISMENTLING/REBUILDING OF ASSEMBLY AT BENCH R R

‹ Prev Rear noise (creaking/squeaking/ticking)Next › Rear noise (knocking)

Parts & tools for this job Staging For 2005 Alfa Romeo Brera

Links open Amazon search results in a new tab. As an Amazon Associate I earn from qualifying purchases.