Repair 312 block bottom hole half gone starter side?


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By moose19sk - 15 Years Ago
Is there a way to repair the broken off piece lower hole in the block lower starter bolt hole. Don't have the piece. Thanks Steve
By MoonShadow - 15 Years Ago
Is any part of the tab left? Sometimes a long bolt washer and nut can be used to pull it up tight enough. You may be able to get away with running 2 bolts. The later FE starters that some people use only have two bolts. Chuck in NH
By moose19sk - 15 Years Ago
Thanks for the reply there is about half of the threads showing on the inner part and the outside part is gone. Just picked it up so looking for a fix for it. Thanks Steve Ct.
By Ted - 15 Years Ago

Here are a couple more options.

  1. Build up the broken end with weld and redrill/tap the missing hole.
  2. Cut off some more of the block ear that’s broken and replace and weld on a similar piece from another unusable block while the new piece and the block are bolted up to a bellhousing for bolt hole alignment.
By Pete 55Tbird - 15 Years Ago
Steve

Is it possibe to use a piece of sheet metal like a later engine block plate between the block and the bellhousing and bolt the lower mount to that. Just a thought. Pete

By Hoosier Hurricane - 15 Years Ago
How would a redneck from Indiana do it?  Cut a 5/16 nut in half, stick a 5/16 bolt in the threads of the casting, put 1/2 the nut on the bolt so the threads in both are aligned and the front face is flush, clamp it and weld the nut to the casting.
By moose19sk - 15 Years Ago
Thanks everyone for the idea's will make something work. Was thinking of welding a stud to it but might be a problem getting the stater out. Will work on it. Steve
By Hoosier Hurricane - 15 Years Ago
Steve:

I welded a stud on my truck, and starter installation is doable.  Not sure if it would work on a car, the mount is in the way.

By Ol'ford nut - 15 Years Ago
My 56 came with the stud welded in on my car and it works fine. Must be a few of these broken over the years!
By PF Arcand - 15 Years Ago
Does someone want to make a recommendation on what type of welding material to use? Welding on cast can be tricky, do it wrong & you can start another crack.
By PF Arcand - 15 Years Ago
Does someone want to make a recommendation on what type of welding material to use? Welding on cast can be tricky, do it wrong & you can start another crack.
By Hoosier Hurricane - 15 Years Ago
Paul:

I used Nirod 55, reverse DC arc weld.  The weld amounts to little more than a spot weld.  Heat buildup is minimal, as is potential for crack.

By pegleg - 15 Years Ago
Paul,

       We rednecks use a high nickel rod. You are correct, you should preheat the area with a torch to prevent stress cracks.

By Hoosier Hurricane - 15 Years Ago
After thinking about this, I re-read the original post.  The starter bolts to the bellhousing, not the block.  Bellhousings aren't that hard to find.
By moose19sk - 15 Years Ago
Sorry about that it's the bottom hole on the block passenger side. Not use to these engines.So what your saying is the bellhousing bolts to that hole not the starter. So is it a big problem?Steve.
By Hoosier Hurricane - 15 Years Ago
Yes, the bellhousing bolts to it.  It is a 7/16 bolt, right?  Same things can fix it, weld on a 1/2 nut or a stud.