Road test for noise recognition
- Make
- Alfa Romeo
- Model
- 159 Factory Service Manual
- Year
- 2005–2011
- Section
- General › Road test for noise recognition
ROAD TEST FOR NOISE RECOGNITION
| CHECK | Operation | |
|---|---|---|
| 1 | Before proceeding with the test, check that the tyre inflation pressure is correct. | Restore the correct tyre inflation pressure. |
| 2 | Check that the wheels are correctly balanced | Rebalance the wheels |
| 3 | Start up the engine and, with the vehicle stationary (switch off the ASR using the special button), check that the noise from the front area is not present. | The cyclical noises are due to the power unit. The test can be considered over |
| 4 | Steer, with the vehicle stationary, to the left and the right and check that there is no irregular noise and check that there is no irregular noise with the gearbox in neutral. | Continue as indicated |
| 5 | Set off from stationary to check that there is no metallic noise or roughness. | Continue as indicated |
| 6 | Still setting off from stationary, check that there are no transverse vibrations. | Continue as indicated |
| 7 | Carry out a road test on an unmade road engaging the various gears. | Continue as indicated |
| 8 | Carry out a road test on an unmade road engaging the various gears when cornering. | Continue as indicated |
| 9 | With the help of a colleague, check that the noise is not due to one of the dashboard components not being properly fastened (when your hand is placed on top of it the noise either lessens or disappears). | The noise is due to creaking of the interior/exterior dashboard components. The test can be considered over |
| 10 | If the vehicle is fitted with a sun roof, check that the noise is not being caused by the later by opening and closing it and placing your hand on it to quieten any noise. | The noise is due to the sun roof. The test can be considered over |
| 11 | Brake in safe conditions to check whether the noise is only present during braking as a result of the brake discs. | The noise is caused by the brake discs. The test can be considered over |
| 12 | Pull the handbrake lever gently, whilst driving in a straight line, to check whether the noise disappears. | Adjust the handbrake travel |
| 13 | During the previous check, make sure that there are no transverse vibrations during the pull and release stages. Increase the speed and check that there is no metallic noise, possibly accompanied by transverse vibrations which vary according to the vehicle speed or engine revs. | Continue as indicated |
| 14 | Carry out a road test on an unmade road (cobblestones) to define the type of noise, checking that there is no creaking from the front area. | Continue as indicated |
| 15 | Carry out a road test on an unmade road (cobblestones) to define the type of noise, checking that there is no whistling from the front area. | Continue as indicated |
| 16 | Carry out a road test on an unmade road (cobblestones) to define the type of noise, checking that there is no knocking from the front area. | Continue as indicated |
| 17 | Carry out a road test on an unmade road (cobblestones) to define the type of noise, checking that there is no creaking/clicking from the rear area. | Continue as indicated |
| 18 | Carry out a road test on an unmade road (cobblestones) to define the type of noise, checking that there is no whistling from the rear area. | Continue as indicated |
| 19 | Carry out a road test on an unmade road (cobblestones) to define the type of noise, checking that there is no knocking from the rear area. | Continue as indicated |
When carrying out Steps 14 to 19, steering in safe conditions to determine whether the noise is present especially when steering and whether it is more noticeable on one of the two sides.
In the latter case, the subsequent checks should be carried out more carefully on the side in question.
Also check that there are no transverse vibrations accompanied by noise. In this case, continue as indicated
Parts & tools for this job Staging For 2005 Alfa Romeo 159
- TOOLTrim removal tool kitSearch: trim removal tool kit
- PARTTouch-up paintSearch: Alfa Romeo touch up paint
- PARTPanel clip assortmentSearch: Alfa Romeo panel clips assortment
Links open Amazon search results in a new tab. As an Amazon Associate I earn from qualifying purchases.