3308730 - S50 CLIMATE CONTROL SYSTEM NOISY' / (IN THE ENGINE COMPARTMENT)

The climate control works properly, but there is too much noise coming from the engine compartment
Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation
Disconnect the services belt and check whether the noise disappears.
Do not let the engine run for long with the belt disconnected
Check whether the noise only occurs with the engine switched off		 Continue to Step 1 The noise disappears when the services belt is disconnected See table   S10 
The noise only occurs with the engine switched offCheck that it is not coming from the electric fan
1CHECKING PIPE AND COMPONENT FASTENINGSAll OKProblems metOperation

Check that the system pipes and components are correctly fixed. In the order:

  • drier filter fixing
  • pipes fixing (with bands and spacers)
  • no interference between the pipes and other components in the engine compartment
 Continue to Step 2 Components fixing not correctRestore the correct tightening.If necessary, replace the bands or spacers, (see Assembly 5040A)
Interference in the engine compartmentRestore the correct lay out
2COMPRESSOR FIXINGS CHECKAll OKProblems metOperation
Check that the compressor is correctly fixed to the engine Continue to Step 3 Compessor fixing not correct Tighten the bolts to the specified torque. Op.   5040A20 
3COMPRESSOR CHECKAll OKProblems metOperation
Check that the noise is not coming from inside the compressor
If this is the case, it is accompanied by a system malfunction. See table   L01  CLIMATE CONTROL NOT WORKING
Continue to Step 4 Compressor malfunction Replace the compressor Op.   5040A20 
4HECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisFault persistsSearch for the fault starting from another symptom'