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98 engine knock

This is a discussion on 98 engine knock within the General Help forums, part of the LSx Technical Help Section category; Car has 200 k miles and just got a knock the other day. Stoped driving and figured it needed a ...

  1. #1
    Junior Member
    Join Date
    Mar 2006

    98 ta

    98 engine knock

    Car has 200 k miles and just got a knock the other day. Stoped driving and figured it needed a rebuilb (which it does) but i would like to drive it the rest of the summer before taking a part for a full rebuild.

    question is do you think i got internal problems that a rebuild is needed or do you just think i could change the knock sensors and fix it?

    I heard 98's were known for bad knock sensors.

    basically it's lounder at different rpm's and if there is or isn't a load on it. in park it's pretty damn loud but goes away if put into gear at an idle. cars an automatic

  2. #2
    Are you running premium gas already? How bad was the knocking- or was it just a little pinging? I've heard the 98's had very sensitive knock sensors, so maybe replacing it would help.

  3. #3
    Join Date
    Aug 2005

    Quick Silver
    2002 Z06

    I have a 98 with 165,000 and have had no issues with knock sensors. Always run Premium gas though. Also you said knock not ping. So did you mean knock like a mechanical knock? Maybe you have a floated lifter or something?? If it is mechanical the only downfall to driving it is that something might shoot thru the block and then you wont' have something to rebuild.

  4. #4
    Veteran 0rion's Avatar
    Join Date
    Aug 2005

    98 Formula
    06 duramax

    What does your oil pressure look like and has it dropped lately? Could it be a spun bearing? Is it that kinda knock or are you talking about pinging? I suppose it could also be piston slap, does it go away after the car warms up?

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