S43 NOISE ' REAR / WHILST DRIVING OVER UNMADE ROAD - Alfa - 156 - eLearn

3233168 - S43 NOISE ' REAR / WHILST DRIVING OVER UNMADE ROAD

When the vehicle is driving over an unmade road or where there are a large number of bends, there is noise from the rear.

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Preliminarily check that the tools which come with the vehicle and the spare wheel are properly fixedRoad test the vehicle on an unmade road or one with a large number of bends to identify the type of noise:	Unspecified noise: Continue to Step 1	The noise is a creaking	Continue to Step 1
			The noise is a whistling	Continue to Step 3
			The noise is a knocking	Continue to Step 5
1	SUSPENSION COMPONENTS CHECK	All OK	Problems met	Operation
	Check the rear suspension components for any signs of rubbing: between the suspension arm bushes and washers between the dust cover and the shock absorber between the end of travel buffer and the housing	Continue to Step 2	Signs of rubbing	Lubricate or replace the parts involved (see Subassembly 4420)
2	ANTI-ROLL BAR TIGHTENINGS CHECK	All OK	Problems met	Operation
	Check the condition of the anti-roll bar flexible mountings and that they are correctly tightened	Continue to Step 6	Anti-roll bar mountings worn or not tightened	Restore the tightenings, lubricate, or replace the mountings Op. 4420C10
3	SHOCK ABSORBER CHECK	All OK	Problems met	Operation
	Check for any friction between the shock absorber stem and the seal	Continue to Step 4	Signs of rubbing	Lubricate or replace the shock absorber Op. 4420A12
4	WHEEL BEARINGS CHECK	All OK	Problems met	Operation
	Check the operation of the rear wheel hub bearing	Continue to Step 9	Bearing worn or damaged	Replace the wheel hub bearing Op. 4450D10
5	BUSHES AND FLEXIBLE MOUNTINGS CHECK	All OK	Problems met	Operation
	Check the condition of the bushes and mountings and that they are correctly tightened In the order: track control arm ball joints shock absorber attachment mounting	Continue to Step 6	Arm supports worn or damaged	Replace the supports (see Assembly 4420B)
		Continue to Step 6	Shock absorber attachment mounting damaged	Replace the mounting Op. 4420A12
6	BRAKE FIXINGS CHECK	All OK	Problems met	Operation
	Check that the brake pipes and handbrake cables under the bodyshell are correctly positioned and fixed	Continue to Step 7	Brake pipes not properly fixed	Suitably tighten the components involved.Replace any damaged components, if necessary (see Assembly 3340B)
		Continue to Step 7	Brake cables not properly fixed	Suitably tighten the components involved. Replace any damaged components, if necessary (see Assembly 3380A)
7	RESERVOIR FIXINGS CHECK	All OK	Problems met	Operation
	Check that the brackets securing the reservoir to the underbody are correctly positioned and fixed	Continue to Step 8	Components which are not properly fixed cause noise	Suitably tighten the components involved.Replace any damaged components PROCEDURES - Assy. 1040A.
8	EXHAUST PIPE FIXINGS CHECK	All OK	Problems met	Operation
	Check that the exhaust pipe is correctly positioned and fixed to the underbody	Continue to Step 9	Components which are not properly fixed cause noise	Suitably tighten the components involved.Replace any damaged components, if necessary (see Assembly 1076B)
9	CHECK CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists	Search for the fault starting from another symptom'