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360 Odd sound coming from pulleys

Discussion in '360/430' started by 550nitis, Dec 11, 2023.

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  1. 550nitis

    550nitis Formula Junior
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    #1 550nitis, Dec 11, 2023
    Getting this weird noise from the drivers side of engine, feel like it's a tensioner, pulley or a belt. The sound is intermittent and is after the car has warmed up and then driven at a low rpm. The sound doesn't get louder with higher revs or speed. I just can't seem to replicate it once I get to the shop.
    I've had two shops look at it and both say the tensioner pulleys are fine and find nothing.
    Ufffffffff.
     
  2. 550nitis

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    #2 550nitis, Dec 11, 2023
    Thought it was the hydraulic tensioner or some other pulley. The full major was done only two years ago.
     
  3. craze

    craze Formula 3

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    #3 craze, Dec 12, 2023
    Ac comp?
     
  4. flash32

    flash32 F1 Veteran

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    #4 flash32, Dec 12, 2023
    The thing that got me is that the noise doesn't change with Rpm

    Can you post a sound clip

    Sent from my moto g power using Tapatalk
     
  5. 360+Volt=Prius

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    #5 360+Volt=Prius, Dec 13, 2023
    Agree with Dominic if it doesn’t change with engine rpm can’t imagine it’s a pulley. Also does the car have to be moving? if so then prob look elsewhere.

    Does it happen with the ac on (windshield defroster will engage ac)?
     
  6. flash32

    flash32 F1 Veteran

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    #6 flash32, Dec 13, 2023
    Could it be a fuel pump

    Sent from my moto g power using Tapatalk
     
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  7. 550nitis

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    #7 550nitis, Dec 15, 2023
  8. 550nitis

    550nitis Formula Junior
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    #8 550nitis, Dec 15, 2023
    That could be but I thought that was more of an air sound?

     
  9. 550nitis

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    #9 550nitis, Dec 15, 2023
    The car needs to be moving but doesn't change with rpm. The shop confirmed the pulleys belts are all good. Have to look else where!

     
  10. 550nitis

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    #10 550nitis, Dec 15, 2023
    Just put a video link bellow!

     
  11. flash32

    flash32 F1 Veteran

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    #11 flash32, Dec 16, 2023
    very hard to tell ... at first I thought TO bearing .. but you say it doesn't change in rpm / speed
    Could it just be a rattle from one of the exhaust clamps ..
    Air pump .. but that should be off after warm up
    Sorry .. hard to diag over internet
    Best bet - buy a stethoscope from harbor freight and poke around .. you will find it in a few minutes - use the cone tool first to isolate area and then metal rod to pin point it
     
  12. 360+Volt=Prius

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    #12 360+Volt=Prius, Dec 16, 2023
    For some reason I can’t access the clip.

    Only happens when car is moving so will be hard to use stethoscope.

    Will it happen if rolling in neutral?

    If so What about if you shut the car while rolling in neutral?
     
  13. 360+Volt=Prius

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    #13 360+Volt=Prius, Dec 16, 2023
    I was able to listen, forget my last post, clearly happening when not moving.

    I agree with Dominic try a stethoscope. Have you tried turning off the heat/ac, the ac compressor is on that side. Push the stop button.
     

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