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Help....How do I fix this mess? 71 Blazer 350



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Old 05-29-2011, 10:45 AM   #1
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Help....How do I fix this mess? 71 Blazer 350

My 71 Blazer with original 350 needs help. PO welded (rigged) the starter bolt/stud in place. It snapped after many attemps to heat and bend it for proper starter allignment. I am running a gear reduction starter.

Good fab or welding shop in Houston? Grind out welded area, build back up, drill, tap, and install insert for new starter bolt?

Thanks in advance for any and all help!

Tim

My pics are to big for this site.....I don't have problems publishing same pictures to 67-72chevytrucks.com. Why here?
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Old 05-29-2011, 11:23 AM   #2
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Resize your pictures to 800x600 and the will load just fine.

I would say the easiest thing to do would be drill out the broken bolt then re-tap the hole.
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Old 05-29-2011, 12:57 PM   #3
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Drill out the stud. Once you get past the weld, you should be able to put a small pilot hole in the remaining stud and use a screw-out or something to extract the rest.

Took me a while to figure this one out...on your pics, they have to be about 1.1MB or less to load them to the picture gallery.
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Old 05-29-2011, 02:42 PM   #4
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Big block swap.
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Old 05-29-2011, 05:37 PM   #5
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Old 05-29-2011, 08:55 PM   #6
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Big block swap.
Not ready for my Mark's motor yet.......
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Old 05-29-2011, 08:59 PM   #7
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Snick and AJ, thanks for the picture help.
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Old 05-29-2011, 09:23 PM   #8
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Here is a pic. the stud snapped at the weld. I need to find a shop that can weld on cast. My thought is to remove old weld, build back up, machine, drill, tap, and use a regular starter bolt.

Can this be done?

Thanks, Tim
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Old 05-29-2011, 09:34 PM   #9
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It's going to be difficult to drill and tap a weld. I had this same thing happen on a Sbc of mine. I tried everything to solve my problem, but in the end I just swapped the motor. Now I'm not saying it can't be fixed but I couldn't ever figure out a way. Hope this doesn't discourage you........
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Old 05-29-2011, 09:42 PM   #10
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UGH.....

After seeing the pic it would be a lot less work to just swap in a new engine.

Trying to rebuild that would be a complete PITA and would never be quite right.
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Old 05-29-2011, 09:52 PM   #11
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Help....How do I fix this mess? 71 Blazer 350

I had something similar happen my 72. The machine shop welded it and then threaded it. What I did was I bought a bracket that braced the starter. That seemed to help. That was on a motor with 10:1 comp, and it held up. Didn't look as bad as yours though.
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Old 05-29-2011, 09:53 PM   #12
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Yeah, that's just a mess. Not sure how I'd handle that other than start looking for a new motor. Not exactly what you wanted to hear.
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Old 05-29-2011, 10:23 PM   #13
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Had that same corner brake off on one of my old small blocks I just bought a reman short block and swapped all my stuff over.
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Old 05-30-2011, 08:22 AM   #14
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Why not weld some threads to the stud sticking out use it till it fails?
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Old 05-30-2011, 12:26 PM   #15
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Why not weld some threads to the stud sticking out use it till it fails?
Good call. What else do you have to lose? Just be bevel the ends and weld them together......
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Old 05-30-2011, 12:47 PM   #16
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350 4 bolt main, no cracks or damage, 80-85 block, standard bore, $150 you pick up.

I would try welding to whats left also if I did not have the money to fix corectly. Hope you can figure it out.
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Old 05-30-2011, 03:42 PM   #17
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Thanks for all the feedback!!

Not sure what to do yet. I will be down for the count until July starting this Thursday. I'll have plenty of time to think and research this problem.

Tim
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Old 05-30-2011, 03:54 PM   #18
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I've done quite a bit of research on your problem, and the most effective fix is an Ls-1
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Old 05-30-2011, 04:46 PM   #19
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You get a C. If you really did your research, you would have recommended this:

467 517 HP 564 TQ
9.1 compression







From Mark Jones aka VortecPro.

Now put you cap on and sit in the corner.....
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Old 05-30-2011, 11:58 PM   #20
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Help....How do I fix this mess? 71 Blazer 350

Damn that is sexy!!!!
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Old 05-31-2011, 08:22 AM   #21
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you could cut that weld and stud out, build the lug back up with weld, then use a guide plate to drill/tap a new hole. Pain in the butt on your back under the truck though.
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Old 05-31-2011, 12:27 PM   #22
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Help....How do I fix this mess? 71 Blazer 350

Quote:
Originally Posted by TexasSilhouette View Post
you could cut that weld and stud out, build the lug back up with weld, then use a guide plate to drill/tap a new hole. Pain in the butt on your back under the truck though.
With metal shavings and welding slag dropping on your face.......

Better use a jacket. Lol
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Old 06-22-2011, 03:30 AM   #23
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So what did you wind up doing???
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