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Mysterious engine sound 308 GTB

Discussion in '308/328' started by Andreas Engesvik, Aug 11, 2025 at 5:23 PM.

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  1. Andreas Engesvik

    Andreas Engesvik Karting

    Mar 4, 2020
    150
    Oslo, Norway
    Full Name:
    Andreas Engesvik
    #1 Andreas Engesvik, Aug 11, 2025 at 5:23 PM
    The sound occurs only when cold starting - and then It disappears after a few minutes. The engine runs fine - euro dry sump 77. Thanks
     

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  2. DanielGA

    DanielGA Karting

    Mar 19, 2018
    159
    Midwest
    Full Name:
    Daniel A.
    #2 DanielGA, Aug 11, 2025 at 5:29 PM
    Well audios in videos are not ideal for this but.....

    1. sounds like a loose screw....but that going away would not be expected.
    2. could be a crack/hole that upon warm-up seals...I had a maybe similar noise because one for the airpump plugs in exhaust header got lose...easy fix.
    3. you are pointing at the water pump...is that where it is coming from? if you put your hand on it, does it vibrate?
     
    Andreas Engesvik likes this.
  3. Andreas Engesvik

    Andreas Engesvik Karting

    Mar 4, 2020
    150
    Oslo, Norway
    Full Name:
    Andreas Engesvik
    #3 Andreas Engesvik, Aug 11, 2025 at 5:41 PM
    Thanks - sound both like a loose screw - small stone caught somewhere - and almost like static electricity. I have driven the car approx 500 km since this sound first appeared last week.
    No vibrations from the water pump either. The sound is difficult to locate. I will check the air pump plugs.
     
  4. Dockboy

    Dockboy Formula Junior
    Silver Subscribed

    May 11, 2013
    614
    Maryland
    #4 Dockboy, Aug 11, 2025 at 6:31 PM

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