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broke motor question

This is a discussion on broke motor question within the Internal Engine forums, part of the LSx Technical Help Section category; I have a mettalic noise coming out of my motor. I pulled the valve cover off the drivers side and ...

  1. #1

    broke motor question

    I have a mettalic noise coming out of my motor. I pulled the valve cover off the drivers side and everything looks ok. I can still crank off the passengers side of the motor. When I do this all the lifters are still pumping oil, when I rev it a little I can put pressure on all the rockers and I can't tell any difference. When I rev it it sounds more like its a metalic knock under the intake. Will rollor lifters still pump oil if they have come apart? Does sound travel in a way to decieve you of its origin on these LS1s?I was hoping to find something simple but its looking bad rite now. Has anybody got a thread that tells you how to trouble shoot this type of trouble. I'm old school and this is the first LS1 I have ever turned a wrench on. I was going to tear it on down but rite now I can still crank 1 side and get it on a car carrier if I can't fix it.. HELP!

  2. #2
    Evr sena bdgr killa snak? Roastem's Avatar
    Join Date
    Dec 2005
    Research Triangle Park, NC

    '99 Z28 M6

    Mine was ticking bad before I installed the cam in it. After I installed the cam and retorqued the rockers, it disappeared. The ticking was really loud when a car would pull up beside me at a light. The problem had to have something to do with the valvetrain.
    Heads 'n Cammed, Moser 12, 3.73's, Weight Reduction, 13" Brembo Kit
    BMR track suspension, full exhaust, the works...
    412whp/394wtq 1/4 mile slip coming soon!
    Gone: '01 Laser Red Cobra 3.73's/Full Bolt-ons

  3. #3
    the chief oldguy's Avatar
    Join Date
    Jul 2006

    1998 TA Convertible


    Rockers have been known to puke the needle bearings in these. You should have found needle bearinngs on the magnetic drain plug if this happened. If you don't change your own oil, you might never know unless the guy changing it was smart enough to say something.

    I would take the other valve cover off and look for loose needles laying around. Then remove all of the rockers which is not difficult. It is hard to see the damage unless you take them off. The hard part is removing the back bolts on the passenger valve cover.

  4. #4
    Junior Member speeddemon100's Avatar
    Join Date
    Aug 2006

    05 GTO M6

    yeah most likely rockers.....

  5. #5
    Junior Member
    Join Date
    Jun 2006
    New Orleans

    1998 Pontiac Trans Am

    I think I am having the same problems. Did your computer throw a code or anything. Mine was making a horrible sound on the way to work. I was not in the throttle at all. Just doing about 45. I noticed a lose of power. I am right at that 90k mark.

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