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99 corvette with knocking noise - idles fine - good oil pres

This is a discussion on 99 corvette with knocking noise - idles fine - good oil pres within the Corvette forums, part of the Vehicle Specific category; Hi, new to site - just got this corvette - trying to find ways to take care of problem - ...

  1. #1
    Junior Member
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    jackson, Ca
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    black
    1999 Corvette

    99 corvette with knocking noise - idles fine - good oil pres

    Hi, new to site - just got this corvette - trying to find ways to take care of problem - other modifications to car include headers, items set up for racing, sheets of metal underneath floorboard, intake manifold specially done with someone's name on it.

  2. #2
    Yeah baby! Yeah! silverWS6's Avatar
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    Silver 2002 WS.6
    Red 1989 Formula

    Need more details on the noise, is it a big knock? Or a small knock? Does it increase when you rev the engine? Details man details!

  3. #3
    None Shall Pass Knight's Avatar
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    Black
    99 WS.6 - Modified

    Agree, we could use a little better description. It could be something simple like an exhaust leak, to something more complicated.

  4. #4
    Junior Member Circa307's Avatar
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    Silver
    98 Trans Am

    i have a knock when i first crank mine up on cold mornings but goes away when it warms up and goes away as i rev it up. is this what yours is doing???

  5. #5
    Corvette Moderator BlownC5's Avatar
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    Velocity Yellow
    2006 E-Force blown Z06

    could be piston slap too

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