S40 Front noise driving on straight, smooth road

Make: Fiat
Model: Seicento Factory Service Manual
Year: 1998–2010
Section: Noise and vibration › S40 Front noise driving on straight, smooth road

DiagnosisS40 Front noise driving on straight, smooth road

When the car is running on a straight, smooth road, front noise can be heard, often with vibrations. The noise increases with speed

Preliminarily check:
– tyre pressure
– tyre type and condition

Step	Validity	Operation to be performed	Test results
Step	Validity	Operation to be performed	All OK	Problems found	Intervention
1	CHECK WHEEL BEARINGS	Run a test, steering gradually rightwards or leftwards. Check whether the noise increases	Noise is constant: Go to Step 2	Noise increases considerably with steering angle: worn or damaged bearing	Replace wheel hub bearing PROCEDURE OP. 4450C32
1	CHECK WHEEL BEARINGS
2	CHECK WHEELS	Check – correct wheel geometry – wheel rim intactness	Go to Step 3	Incorrect wheel geometry	Restore correct wheel geometry PROCEDURE OP. 4450B46
			Go to Step 3	Dented or distorted rims	Replace rims PROCEDURE OP. 4450B14

3	CHECK CORRECT OPERATION	Check the fault is no longer present	All OK End of test	Fault persists	Seek fault starting from another symptom (noise was not correctly interpreted: see Glossary) Finally, see table S41
3	CHECK CORRECT OPERATION	Check the fault is no longer present

Parts & tools for this job For 1998 Fiat Seicento

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