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Thread: Pinning Sleves

  1. #1
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    Pinning Sleves

    I have heard of shops "pinning the sleeve" when the install new ones. Has anyone have pic's of the pinning process? Just want to see if this should be a good practice for any engine builds. Feel free if you have a comment or experience with this.

    Thanks
    t-top

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    Bad idea Something is machined wrong of u need to pin a sleeve.
    Nitrous is like a slut. u wanna hit it but you know there will be consequences.

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  4. #3
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    Many years back before I started doing my own sleeving I had a very reputable gentleman do my sleeves and he always pinned them. Actually cut threads in the sleeve at the bottom and put in a button head screw in an area where there was no piston contact. Bored them after pinning and I never had an issue with them. I personally never pin mine cuz I don't see the necessity. If I had a motor that was allowing the sleeve to rotate I might consider it.

    Rock
    Team Junk

    No sparkling wiggles in here, only dump truck grinches.

    "Screamin Heathen"

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    Yeah.... this sure caused excessive grief.

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  7. #5
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    One of my neighbours had a sleeve put in his 90's 80hp Merc and they pinned the sleeve.
    I have a 70hp OMC that had the centre sleeve twist. I heated the block and rotated the sleeve back.
    The motor may have run hot causing this I'm not sure . I got the motor after this all happened to see if i could fix it. I was thinking that pinning it would help but unsure how people are doing it?
    does anyone have any pictures?
    thanks
    t-topp

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    was pretty common with steel sleeve "stem winders" many years ago but as time went on figured out it wasn't needed.. wasn't done 'cause of bad machine work at all.. jus one of those things that was thought to be needed back then!

    some (pins) that were really hard ta see would really piss off an unknowing machinist trying ta pull a bad sleeve.....
    you would get an ear full of very expletive words of description for not mentioning it..........
    Last edited by tlwjkw; 02-17-2018 at 06:46 AM.

  9. #7
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    Take a look at this thread- picture(s) included of pinned sleeve- I end up giving this block to James Perry after everybody "commented" on pins

    https://www.screamandfly.com/showthr...=pinned+sleeve

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    not any where close ta tha way it was done on tha 2.4's of yester year.......... that way would really suck.

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    Never seen one done that way. Usually they are pinned at the bottom of the sleeve in an area where there is solid aluminum in direct contact with the steel sleeve and no water or fuel charge nor any piston skirt contact.

    Rock
    Team Junk

    No sparkling wiggles in here, only dump truck grinches.

    "Screamin Heathen"

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    Thanks for the link... it seems like the "Pinning" process is more of a coverup than it is a safe guard against sleeves moving!
    I my earlier post about the omc sleeve twisting/rotating i had a buddy tell me to do the water relief hole update heat the block and rotate the sleeve back and it will be fine.
    I will try it and see how easy the other sleeves turn when the block is hot to see if any other problems exist.
    Thanks for all the comments!

    t-topp

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    I have a 2.5 with pinned sleeves that use screws in the bottom of the block and are threaded into the sleeves. Its in a very high rpm motor.
    If I don't ask any questions, I'll never learn anything.

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    Omc f1 v8 has pinned sleeves

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  16. #13
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    Quote Originally Posted by ttopping View Post
    I will try it and see how easy the other sleeves turn when the block is hot to see if any other problems exist.
    Be careful. Years ago I'm did my first 3.0 and I pulled it out of the oven just like I do the 2.5 and set it on the oven door. The extra weight of the 3.0 caused the oven to tilt dumping all 6 sleeves on the floor. The interference is greater on some motors than others. If yours turned in the block odds are the interference is insufficient and they may all turn pretty easily.

    Rock
    Team Junk

    No sparkling wiggles in here, only dump truck grinches.

    "Screamin Heathen"

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