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  1. #1
    Active Member One Ring
    Join Date
    Feb 11 2018
    AZ Member #
    413837
    Location
    UK

    Startup rattle opinions

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    Hi All,

    In the market for another S4 after someone killed the last one hitting it while parked up!

    Have a video of one I'm interested in, Chains done by Audi at 86k, now on 116k so should be good, but does have a a short rattle on starting, sounds to me like the usual one and not much else to worry about - but additional opinions welcome and appreciated.

    https://youtu.be/Qm8pubXB_6M


    Thanks,
    Harry

  2. #2
    Active Member Two Rings
    Join Date
    Mar 30 2012
    AZ Member #
    90907
    Location
    Somewhere

    Mine sounds the same, 81k miles on original timing components. It bothered me at first but I think it's just due to low oil pressure in the heads/tensioners the first half second on start. I'll be concerned if duration increases.

  3. #3
    Veteran Member Three Rings jakeoboy67's Avatar
    Join Date
    Oct 21 2013
    AZ Member #
    126068
    My Garage
    mk2 Jetta Tdi
    Location
    NB , Canada

    If it's always as short as in the video, I wouldn't be concerned about it.

    As Whoa said, I'd worry if the rattle lasts longer or also happens on a hot start.

    I've had pretty consistent hot start rattle before replacing the oil checkvalves in the valley.

  4. #4
    Senior Member Four Rings VinnysS4's Avatar
    Join Date
    Nov 12 2015
    AZ Member #
    364349
    Location
    Oregon

    Oil check valves FTW!

    Or just buy a Accusump

    Sent from my SM-N920V using Tapatalk
    1997 VW GTI VR6 (sold), 2003 Audi RS6 (sold), 2010 Audi A4 2.0T (RIP Totaled on 11/2/2015 ) 2005.5 Audi S4

    My build log
    http://www.audizine.com/forum/showth...-s-s4-timeline

    Texpoops "Correct, but a half inch difference isnít going to accelerate wear by much. Iím sure the front dips that much with a fatty in the front"

  5. #5
    Established Member Two Rings
    Join Date
    Dec 19 2014
    AZ Member #
    304212
    Location
    Salt Lake City

    What Vinny said ^^^
    Oil check valves and spray jet are relatively easy to get to and you can re-seal the manifold at the same time. Iíve only been through 2 of these engines now, but the most recent had perfect guides, and slightly rounded out mechanical tensioners. Iíve been told the tensioners and oil check valves wer most likely causing the rattle.


    Sent from my iPhone using Audizine



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