3233152 - 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
0PRELIMINARY CHECKSAll OKProblems metOperation
Check the condition of the auxiliary shaft drive belt and check that the tension is correctCheck that, as the electrical loads engaged increase, the whistling does not increase, but remains constant Continue to Step 1 Tension incorrect Replace the belt 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
1CHECK AUXILIARY SHAFT BELTAll OKProblems metOperation
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, in particular, belt tensioner P Op.   1092G10 
2CHECK ON COMPONENTS DRIVEN BY THE BELTAll OKProblems metOperation

Check the operation of all the components driven by the belt:

  • water pump
  • power assisted steering pump
  • air conditioning compressor
Continue to Step 3 Water pump faulty Restore or replace the water pump Op.   1088C12 
Power assisted steering pump faulty Restore or replace the water pump Op.   4130B20 
Air conditioning compressor faulty Restore or replace the compressor Op.   5040A20 
3CHECK CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisFault persistsSearch for the fault starting from another symptom'