2888446 - S10 ENGINE WHILSTLING / SERVICES BELT NOISY'
There is a whistling (extremely high intensity noise) coming from the area of the engine which varies with the engine speed| Results of the tests | ||||
| 0 | PRELIMINARY CHECKS | All OK | Problems met | Operation |
|---|---|---|---|---|
| Check the condition of the auxiliary shaft drive belt and check that the tension is correct Check that, as the electrical loads engaged increase, the whistling does not increase, but remains constant | Continue to Step 1 | Tension incorrect | Adjust belt tension Op. 1092G10 | |
| The whistling increases: alternator faulty (voltage regulator not working properly) | Replace the voltage regulator Op. 5530A22 | |||
| The whistling increases: alternator faulty (connections between alternator and battery not correct) | Restore the connections ( See E5010 STARTING AND RECHARING | |||
| 1 | CHECK AUXILIARY SHAFT BELT | All OK | Problems met | Operation |
| Disconnect the belt to see if the whistling stops. ATTENTION do not run the engine too long with the belt disconnected | The whistling disappears:Continue to Step 2 | The whistling remains constant | Restore the belt control system and the belt tensioner in particular Op. 1092G20 | |
| The whistling remains constant | Restore the mobile belt tensioner Op. 1092G14 | |||
| 2 | CHECK ON COMPONENTS DRIVEN BY THE BELT | All OK | Problems met | Operation |
Check the operation of all the components driven by the belt:
| Continue to Step 3 | Water pump faulty | Restore or replace the water pump Op. 1088C12 | |
| Power assisted steering pump faulty | Restore or replace the power assisted steering pump Op. 4130B26 | |||
| Air conditioning compressor faulty | Restore or replace the compressor Op. 5040A20 | |||
| 3 | CHECKING 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 | |