3308713 - S12 ENGINE BUZZING'
There is a constant, loud noise coming from the area of the engine, which is repeated at constant intervals| 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 | Continue to Step 1 | Tension incorrect | Replace the belt Op. 1092G10 | |
| 1 | CHECKING AUXILIARY DRIVE BELT | All OK | Problems met | Operation |
| Check the belt tensioners and, in particular, the bearings | Continue to Step 2 | Belt tensioner bearings damaged | Replace the belt tensioner (see Assembly 1092G) | |
| 2 | WATER PUMP CHECK | All OK | Problems met | Operation |
| Check the water pump and, in particular the condition of the bearing | Continue to Step 3 | Water pump bearing damaged | Replace the water pump Op. 1088C12 | |
| 3 | CHECKING ALTERNATOR | All OK | Problems met | Operation |
Check the alternator and, in particular:
| Continue to Step 4 | Alternator bearing damaged | Replace the alternator Op. 5530A14 | |
| Pulley fixing not correct | Restore the correct pulley fixing Op. 5530A30 0 | |||
| 4 | HECK ON 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' | |