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Stripped bolt hole on SBC balancer, will larger bolt cause problems?

Discussion in 'The Hokey Ass Message Board' started by poboyross, Sep 10, 2012.

  1. poboyross
    Joined: Apr 29, 2009
    Posts: 2,139

    poboyross
    Member

    I found that one of the bolts that holds the pulley on my balancer was stripped by a previous owner who ended up using a more coarse threaded bolt to hold it on. The first 5-7 threads were stripped pretty good, but a longer bolt will grab the remaining threads better than the existing shorter bolt. Will using a longer bolt on that one hole, or retapping that hole for a slightly larger bolt throw off the balancer?
     
  2. squirrel
    Joined: Sep 23, 2004
    Posts: 46,145

    squirrel
    Member

    how about using 3 longer bolts?
     
  3. #1 Kawboy
    Joined: Aug 4, 2009
    Posts: 189

    #1 Kawboy
    Member
    from Fl

  4. poboyross
    Joined: Apr 29, 2009
    Posts: 2,139

    poboyross
    Member


    LOL...I'm stupid like that sometimes! But since two would be a fine machine thread and one would be a larger diameter, more coarse thread, does that still leave the balancer off whack?
     
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  5. squirrel
    Joined: Sep 23, 2004
    Posts: 46,145

    squirrel
    Member

    If they're all the same length, it should be ok as far as balance if you have one coarse thread and w fine thread. But it'll be fun to be the next guy to work on it....

    also make sure the bolts are all getting enough thread engagement that you can torque them properly, you don't want them coming out when you're driving. If you think it's iffy, get a new damper, they're not real expensive these days.
     
  6. 325w
    Joined: Feb 18, 2008
    Posts: 5,299

    325w
    ALLIANCE MEMBER
    from texas

    Just put them in and go. You ll never know the difference
     
  7. dirt t
    Joined: Mar 20, 2007
    Posts: 4,604

    dirt t
    ALLIANCE MEMBER
    from Kingman,AZ
    1. HAMB Old Farts' Club

    If you are worried about it weigh all three bolts I'd bet they are the same.
     
  8. poboyross
    Joined: Apr 29, 2009
    Posts: 2,139

    poboyross
    Member

    Ha! Thanks for all the info! I guess I thought for some reason they were balanced with a higher tolerance than that.
     
  9. Model T1
    Joined: May 11, 2012
    Posts: 3,310

    Model T1
    Member

    Same problem with the 305 in my 55 Chevy wagon over 6 years ago. Tapped the hole next size. So far the engine doesn't seem to know the difference! May be wrong but it's only a SBC!:)
     
  10. Deuces
    Joined: Nov 3, 2009
    Posts: 18,569

    Deuces
    Member
    from Michigan

    Gotta stop smokin' them fat ones...:D;)
     
  11. poboyross
    Joined: Apr 29, 2009
    Posts: 2,139

    poboyross
    Member

    INDEED. Although I think they did put a better cam in it....it's an 88-89, so it's not supposed to have a lobe for a mechanical fuel pump (had the factory block off plate), but LO AND BEHOLD...I tossed a pump rod in there and spun it over, it *does* have a lobe. Sweetness, wasn't wanting to do the electrical fuel pump anyhow. So now I'm trying to have a little more respect for the poor little guy ;)

    I've got a flatty in waiting at the moment anyway....been thinking of trading it for a running SBC of more *vintage* pedigree....if anyone's got one. Got an ad in the classifieds if anyone wants to look,btw.

    MAN.....if I wasn't asthmatic, I'd be all over that. I'm a stressed out person in general, so I'd probably be normal even if I was puffin' on the fatties ;) LOL
     
  12. oj
    Joined: Jul 27, 2008
    Posts: 6,247

    oj
    Member

    SBC balancers are dime a dozen, get another one and you won't have to worry nor have future problems.
     
  13. el Scotto
    Joined: Mar 3, 2004
    Posts: 4,329

    el Scotto
    Member
    from Tracy, CA

    I think squirrel meant use longer bolts to reach threads that aren't damaged. The holes should go all the way through the dampener. At least they did on mine! ;)

    Run a tap through 'em and use a bit longer bolts. Easier than rethreading a hole. :)
     

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