Broken Bellcrank Repairable ???? - Chevelle Tech
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post #1 of 11 (permalink) Old Aug 26th, 17, 10:16 PM Thread Starter
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Chris
 
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Broken Bellcrank Repairable ????

My original GM '67 Big Block Bellcrank broke, can this be repaired? if so what would be the best way to fix this TIG? MIG? ,



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1967 Chevelle Oshawa Built Car
-427 .60 over, Lunati 60211 Roller cam
-Super T10 2.64
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post #2 of 11 (permalink) Old Aug 26th, 17, 10:47 PM
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Re: Broken Bellcrank Repairable ????

any good weld process for steel will work fine tig being the best
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post #3 of 11 (permalink) Old Aug 26th, 17, 10:47 PM
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Re: Broken Bellcrank Repairable ????

I would have that TIG welded. Clean it up real good. You have to get all the grease, paint, rust, oil, ect. off the part. Clean several inches away from the repair.

I always charge less with a cleaned up part. To bad you don't live just a little closer

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post #4 of 11 (permalink) Old Aug 26th, 17, 10:49 PM
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Re: Broken Bellcrank Repairable ????

This is common with 66-67 bell cranks

I have welded many with a MIG. I have a piece of Copper that fits inside to limit weld on the ID. Careful alignment of the ring groove helps. It takes a bit of skill to not to make a huge glob of weld on the outside as it was a pretty fine weld from the factory.

Good luck, you can always grind and try again, don't be afraid to start.

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post #5 of 11 (permalink) Old Aug 26th, 17, 10:58 PM Thread Starter
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Re: Broken Bellcrank Repairable ????

Quote:
Originally Posted by Molly's 70 View Post
I would have that TIG welded. Clean it up real good. You have to get all the grease, paint, rust, oil, ect. off the part. Clean several inches away from the repair.

I always charge less with a cleaned up part. To bad you don't live just a little closer
I can get access to a Glass bead machine, would this be safe to remove all paint and rust without damaging the broken area?

1967 Chevelle Oshawa Built Car
-427 .60 over, Lunati 60211 Roller cam
-Super T10 2.64
-Dana 60 3.54 Posi
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post #6 of 11 (permalink) Old Aug 26th, 17, 10:59 PM Thread Starter
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Chris
 
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Re: Broken Bellcrank Repairable ????

Quote:
Originally Posted by floyd66 View Post
This is common with 66-67 bell cranks

I have welded many with a MIG. I have a piece of Copper that fits inside to limit weld on the ID. Careful alignment of the ring groove helps. It takes a bit of skill to not to make a huge glob of weld on the outside as it was a pretty fine weld from the factory.

Good luck, you can always grind and try again, don't be afraid to start.
what size of copper tube did you use?

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-427 .60 over, Lunati 60211 Roller cam
-Super T10 2.64
-Dana 60 3.54 Posi
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post #7 of 11 (permalink) Old Aug 27th, 17, 12:44 PM
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Re: Broken Bellcrank Repairable ????

I also add a layer of reinforcing around the tube and up the flat arm at least 1 inch both sides. While you are into it - do the other end too - just a matter of time for it too. Make a loop out of 3/16" round rod, it is easy to form around the tube and up the other side.

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post #8 of 11 (permalink) Old Aug 27th, 17, 9:52 PM Thread Starter
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Chris
 
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Re: Broken Bellcrank Repairable ????

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Originally Posted by OLDED View Post
I also add a layer of reinforcing around the tube and up the flat arm at least 1 inch both sides. While you are into it - do the other end too - just a matter of time for it too. Make a loop out of 3/16" round rod, it is easy to form around the tube and up the other side.
If I were to reinforce the side that broke by adding a piece of steel (see pic) would this help or do you see it interfering it with anything??

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1967 Chevelle Oshawa Built Car
-427 .60 over, Lunati 60211 Roller cam
-Super T10 2.64
-Dana 60 3.54 Posi
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post #9 of 11 (permalink) Old Aug 27th, 17, 10:45 PM
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Re: Broken Bellcrank Repairable ????

I broke mine in high school, somewhere around 1990-1991. Welded the arm back in and reinforced it with 1/4x1 steel strap welded all the way around it and a triangle on the inside. No interference and it never broke again. When I swapped over to big block, I did the same thing to the new one and never had trouble from it either.

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post #10 of 11 (permalink) Old Aug 27th, 17, 11:25 PM
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Re: Broken Bellcrank Repairable ????

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Originally Posted by 1967 chevelle View Post
I can get access to a Glass bead machine, would this be safe to remove all paint and rust without damaging the broken area?
Just get as much grease & oil, paint ect. off that part first. then blast it. A quick wipe off with some Acetone, MEK or MPK will clean off any residue.

Clean & Clean makes for a better weldment.

If you lend someone $20, and never see that person again, it was probably worth it.
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post #11 of 11 (permalink) Old Aug 28th, 17, 1:39 AM
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Re: Broken Bellcrank Repairable ????

send it to me and pay for the postage back and ill fix it for you
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