22 · Diagnostics

Rear noise (whistling/humming)

Make: Fiat
Model: Bravo Factory Service Manual
Year: 2007–2014
Section: Noise / vibrations › Rear noise (whistling/humming)

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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	ACTION
		TEST RESULTS
	Having carried out the road test 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 loudest Op. 4450C32 ONE FRONT WHEEL HUB BEARING, LH OR RH - REPLACE 2.Move on to Step 2
1	CHECK ON FASTENING OF SHOCK ABSORBER TO UPPER TURRET	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check whether the blowing is coming from inside the luggage compartment from the guard securing the shock absorber to the upper turret.	Move on to Step 2.	Blowing coming from the fastening of the shock absorber on the upper turret.	Fit foam sound insulation above the fastening of the shock absorber to the upper turret.
2	BRAKE DISC CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the gap between the brake disc and the steel shield is sufficient.	Move on to Step 3	Gap too small.	Restore the correct gap.
3	SHOCK ABSORBER STEM CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Removing the wheel Op. 4450B12 FRONT WHEELS (TWO) - R+R 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

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

Parts & tools for this job For 2007 Fiat Bravo

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