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Renault laguna 2 1.8 16v - Strange sound from around the alternator

Mroziu88 10689 11
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  • #1 16818888
    Mroziu88
    Level 9  
    Hello
    Patient as in topic 2002. The problem is the sound from the vicinity of the alternator. Reminiscent of a removable water pump. The intensity of the sound increases with increasing revolutions. However, I exclude timing because after removing the alternator belt there is no sound. The second question is, does anyone know what the installation of a backstop on the alternator depends on? It's not in my car. I have this arrangement of belt and alternator.
    Regards
    Attachments:
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  • #2 16818935
    ptr92
    Level 19  
    You have a specific alternator pulley there. It often breaks down. Only of its kind. It is not a typical unidirectional wheel, but it suppresses torsional vibrations.
    Haven't you noticed that sometimes the battery indicator lights up while driving?
  • #3 16818957
    Mroziu88
    Level 9  
    Apart from sound anomalies, nothing happens. This is what the wheel looks like in the picture, not the one-way clutch for this model. And of course it doesn't work like a clutch.
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  • #5 16818989
    moto-kord
    Level 28  
    Does the sound change after turning on the air conditioning?
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  • #6 16819019
    Tazma
    Level 14  
    And this is not the sound of a worn bearing? When the alternator clutch is damaged, after switching on the load, e.g. air conditioning, the belt squeaks and vibrates.
  • #8 16819038
    Mroziu88
    Level 9  
    This sound is constant. After starting the engine. It only increases when adding gas.
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  • #9 16819075
    Tazma
    Level 14  
    The clutch is on the alternator axis, the one on which the multi-ribbed belt is fitted. It should work one way.
  • #11 16819292
    kamiloskop
    Level 23  
    Buddy and the roller and tensioner? Remember that you still have a power steering pump and a Tensioner and a guide roller and this also needs to be checked. Fluid is power.
  • #12 16819775
    Mroziu88
    Level 9  
    So, the tensioner is ok for me. The guide roller will be replaced today and the power support is dry and the amount of fluid is adequate.

    Added after 7 [hours] 18 [minutes]:

    Here I put a video from the work of the engine https://youtu.be/QOs2KxZo2Ok. As for the clutch on the alternator It is there valeo and he has it.

    Added after 6 [hours] 16 [minutes]:

    After replacing the guide roller, fix the problem
    Regards
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Topic summary

The discussion revolves around a 2002 Renault Laguna 2 1.8 16v experiencing a strange sound near the alternator, which intensifies with engine RPMs. The user rules out the timing mechanism as the source of the noise since it disappears when the alternator belt is removed. Responses suggest that the issue may stem from a specific alternator pulley designed to suppress torsional vibrations, which can fail and cause abnormal sounds. Other potential causes include worn bearings, the tensioner, and guide roller. After further investigation and replacing the guide roller, the user reports that the problem was resolved. The user also inquires about the installation of a backstop on the alternator, which is not present in their vehicle.
Summary generated by the language model.
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