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Cylinder Wall Scratches!!! Please help!

This is a discussion on Cylinder Wall Scratches!!! Please help! within the Internal Engine forums, part of the LSx Technical Help Section category; Ok here's how it looks like (last two is same as first two, but edited for better detail): ( Click ...

  1. #1
    Garage Intensity Candice's Avatar
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    Cylinder Wall Scratches!!! Please help!

    Ok here's how it looks like (last two is same as first two, but edited for better detail):

    Click for full size Click for full size Click for full size Click for full size
    (Click for bigger images)

    I just pulled the heads off to change lifters&gaskets, and this is what i found. This one is the worst of the cylinders. I have only been able to see 4 of the cylinder walls so far because i didn't turn the crankshaft yet. I think one of the cylinders was without scratches, but the other 3 had varying degrees of scratches.

    The scratches are not very deep, but enough to get stuck when dragging the nails over them.

    Is it a complete disaster?

    Do i need to hone, bore, resleeve?
    Do i need new pistons, rings?

    I haven't owned the car that long, so i don't know the history of it. What can have caused this? Only dirt/metal in the oil, or could it be something else?

    Last time i drove the car it performed normally. I never noticed anything strange with it during the few hundred miles i drove it.

    The car has been stock since i owned it, but i can not tell if that was not the case before i bought it.

    Last edited by Candice; 06-07-2007 at 05:39 AM. Reason: Added photos

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    I have rebuilt quite a few engines over the past 30 years and most of them when torn down have the same appearance as yours. I have never tore down an LS1 yet but I am sure it should be the same. I would consider it normal wear unless your plugs are fouling or you are burning excessive oil. Put it back together and enjoy the car. When it comes time for overhaul a machinist will check the bore and either hone out the scratches or will oversize the hole.

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    Senior Member INMY01TA's Avatar
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    I've seen some metal shavings on my drain plug during recent oil changes. Mine prolly look like yours.

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    Senior Member mrr23's Avatar
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    nothing unusual. just the side of the piston skirt sliding on the wall. i wouldn't worry about it.

    question - why are you changing the lifters?

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    Garage Intensity Candice's Avatar
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    Thanks everyone.

    mrr23 - i was advised to change the lifters because the car has 80k miles on it and i am changing cam, valve train, timing chain and oil pump anyway.

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    O U 8 1 2 Spaz's Avatar
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    Quote Originally Posted by Candice View Post
    Ok here's how it looks like (last two is same as first two, but edited for better detail):

    Click for full size Click for full size Click for full size Click for full size
    (Click for bigger images)

    I just pulled the heads off to change lifters&gaskets, and this is what i found. This one is the worst of the cylinders. I have only been able to see 4 of the cylinder walls so far because i didn't turn the crankshaft yet. I think one of the cylinders was without scratches, but the other 3 had varying degrees of scratches.

    The scratches are not very deep, but enough to get stuck when dragging the nails over them.

    Is it a complete disaster?

    Do i need to hone, bore, resleeve?
    Do i need new pistons, rings?

    I haven't owned the car that long, so i don't know the history of it. What can have caused this? Only dirt/metal in the oil, or could it be something else?

    Last time i drove the car it performed normally. I never noticed anything strange with it during the few hundred miles i drove it.

    The car has been stock since i owned it, but i can not tell if that was not the case before i bought it.


    nothing to worry about... maybe hone the sleves... i would also check to make sure a piston ring didn't go... is it eating any more oil than usual?

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    Senior Member mrr23's Avatar
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    Quote Originally Posted by Candice View Post
    Thanks everyone.

    mrr23 - i was advised to change the lifters because the car has 80k miles on it and i am changing cam, valve train, timing chain and oil pump anyway.
    ok, makes sence. didnt mention that in your inital post.

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    Member 2001hawk's Avatar
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    Candice had a post a while back "please advise on upgrades" last post on June 1. I am not sure that we helped much.

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    Garage Intensity Candice's Avatar
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    Thanks for help all. I was abit too worried by the scratches to just let them stay there, even tho it probably would have been fine like you said.

    I took the engine to a machining shop. The guys there looked at it, and said that most of the scratches was pretty light, but there was some deeper that couldn't just be honed away. So i decided to bore it to 3.908" and go with a set of Mahle pistons for it.

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    Garage Intensity Candice's Avatar
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    And btw 2001hawk, you helped me ALOT!

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    Member 2001hawk's Avatar
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    No problem what we are all here for.

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