312002007 - S010 ENGINE WHILSTLING / SERVICES BELT NOISY
 | There is a high frequency noise coming from the engine whose intensity varies with the number of revs |
| Test results | ||||||
| 0 | PRELIMINARY CHECKS | All OK | Problems encountered | Operation | ||
|---|---|---|---|---|---|---|
| Check the condition of the auxiliary drive belt and make sure the tension is correct.Check whether the noise remains constant when the electrical loads switched on increases | Move on to Step 1 | 1. Belt worn2. Tension not correct3. Noise increases | 1. Replace beltOp. 1092G10 SINGLE ENGINE BELT - R.R2. Adjust the belt tension3. Move on to Step 1 | |||
| 1 | ALTERNATOR CHECK | All OK | Problems encountered | Operation | ||
Check that the alternator is working properly, in particular:
| Move on to Step 2 | 1. Voltage regulator defective2. Connections not correct | 1. Replace the pressure regulatorOp. 5530A24 2. Restore the correct connections. | |||
| 2 | AUXILIARY UNITS BELT CHECK | All OK | Problems encountered | Operation | ||
Check whether the noise disappears if the belt is disconnected
| Move on to Step 3 | 1. The noise disappears.2. The noise remains constant. | 1. Move on to Step 32. Move on to Step 4 | |||
| 3 | AIR CONDITIONING COMPRESSOR CHECK | All OK | Problems encountered | Operation | ||
| Check the operation of the air conditioning compressor. | Move on to Step 4 | Air conditioning compressor faulty. | Repair or replace the compressor Op. 5040A20 AIR CONDITIONING COMPRESSOR - R+R - INCLUDES FLUID LEVEL CHECK AND TOP UP IF NECESSARY | |||
| 4 | BELT TENSIONER CHECK | All OK | Problems encountered | Operation | ||
| Check the condition of the belt tensioner bearings. | End of diagnosis | Moving belt tensioner faulty. | Replace moving belt tensioner Op. 1092G14 ENGINE COMPONENT SINGLE BELT MOVING TENSIONER - R + R | |||
