95 Aero auto 2003

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Thread: 95 Aero auto 2003

  1. #1
    Saab Newbie
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    Aug 2005
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    Ireland
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    95 Aero auto 2003

    Hi, can anyone tell me why my engine knocks briefly on cold start-up -it's always done it and thee Saab main dealer said it was normal for this HOT engine?
    regards - jo

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  3. #2
    Turbo Talker
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    Jan 2003
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    North Yorkshire
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    Re: 95 Aero auto 2003

    Depends what you mean by "knocks". There is usually a bit of a rattle from the valvetrain until the oil reaches the hydraulic lifters...

  4. #3
    Saab Newbie
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    Re: 95 Aero auto 2003 - START-UP KNOCK

    it sounds more like a crankshaft knock I think, a bit like you might hear froma big engine or diesel?

    it stops as soon immediately as the engine has started - it happens I think on the initial firing in the cylinders?

    i seem to recall reading about something like this in a posting 4 months back, but I have checked and can't find it.

    any ideas?

    regards -jo

  5. #4
    Turbo Talker
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    Re: 95 Aero auto 2003 - START-UP KNOCK

    Could be a bit of piston slap, that's not uncommon. Hard to say without hearing it...

  6. #5
    Regular Saab Guy InEurope's Avatar
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    Sep 2005
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    Re: 95 Aero auto 2003

    Mine's a MY95 2.3 LPT. Also gives a knock/rattle on startup. I asked at the garage, they said they all do it.
    I have tried to locate the noise, doesn't seem to be the engine, somewhere right-front or right side of the engine compartment (note I hace a left-drive car)

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