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Knock even when its hot outside

This is a discussion on Knock even when its hot outside within the Internal Engine forums, part of the LSx Technical Help Section category; I have a 99 Z m6 with 104k on it. I am getting knock at start up even when its ...

  1. #1
    Member ssgtcarroll's Avatar
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    91RS 99Z28 11GT 86Bronco

    Knock even when its hot outside

    I have a 99 Z m6 with 104k on it.

    I am getting knock at start up even when its hot outside. It does get less once the eingine warms up but I can still hear it a little.

    Any ideas where to start looking?

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    Senior Member INMY01TA's Avatar
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    2001 Trans Am (sold)

    Run some Sea Foam thru it, if your getting oil in the intake, put a catch can on it. If none of that helps, get a 160' thermostat, new plugs, and put it on a dyno and tune it.

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