TEST RESULTS

Check whether the noise disappears if the belt is disconnected

Move on to Step 2

1. The whistling noise stops

2. The whistling noise remains constant

1. Continue as instructed in the

 See table S010 ENGINE WHILSTLING / SERVICES BELT NOISY

2. Move on to Step 2

Check the alternator and in particular

- the condition of the bearing

- the correct fastening of the pulley

Move on to Step 3

1. Alternator bearing damaged

2. Incorrect pulley fastening

1. Replace the alternator

 Op. 5530A10 ALTERNATOR - R.R.

2. Restore correct pulley fastening

 Op. 5530A30 ALTERNATOR PULLEY OR FAN - R+R WITH ALTERNATOR REMOVED

Check that the belt tensioning is not excessive

Move on to Step 4

Excessive belt tensioning

Restore the correct timing belt tensioning.

Check the belt tensioners and, in particular, the condition of the corresponding bearings.

Move on to Step 5

1. Fixed belt tensioner bearing damaged

2. Moving belt tensioner bearing damaged

1. Replace the fixed belt tensioner

 Op. 1092G20 ENGINE COMPONENT SINGLE BELT FIXED TENSIONER - R + R

2. Replace the moving belt tensioner

 Op. 1092G14 ENGINE COMPONENT SINGLE BELT MOVING TENSIONER - R + R

Check the water pump and in particular the condition of the bearing

End of diagnosis

Water pump bearing damaged

Replace the water pump

 Op. 1088C10 WATER PUMP - R.R.

 Op. 1088C14 WATER PUMP - R + R WITH TIMING BELT(S) REMOVED