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    Loud clatter at startup (GT3)

    Some mornings when I fire up the GT3, the engine makes a really loud metallic clatter noise for a few seconds until the oil pressure comes up. Then it smoothes out normally. Is it a hydraulic valve lifter run dry overnight or something? Anyway, I believe it's nothing to worry about (the service manager at my dealer agrees) but I was wondering if anybody here could explain it properly?

    Also, I'm trying to find a pattern as to when it happens and when not. My one theory (yet to be scientifically tested) is that I think it happens if I rev the engine a bit before turning it off the day before. I think that if I let the car idle for a while before turning it off, the clatter does not happen the next day. Does this sound like crap? Any ideas? TIA.

    Re: Loud clatter at startup (GT3)

    It is the lifters making noise until the oil has had a chance to be pumped around. Mobil One 15W-50 had been an approved oil for a long time. About a year or so ago it was off the list and replaced by 0W-40. I believe it was because customers were complaining about lifter noise at cold start up. Jeff

    Re: Loud clatter at startup (GT3)

    Thanks for the info. I'll ask the dealer what oil they used.

    Re: Loud clatter at startup (GT3)

    Quote:
    Thanks for the info. I'll ask the dealer what oil they used.



    The clatter noise is pretty common on the GT3/TT/GT2 engines. Nothing to worry about. The oil might change things a little bit but it won't dissapear completely.

     
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