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Old 02-07-2019, 07:34 PM   #1
adileo
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Default What would u do?

1939 coupe

Had my radiator professionally cleaned. Putting everything back together. Got 3 of the four bolts on the fan tight. One bolt won’t tighten, only snug and then turns.

1) use lock tight?
2) buy four longer bolts and add nut an lock washer? Does balance matter?
3) only by 1 longer bolt and add nut and lock washer?
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1939 Deluxe coupe
1952 F1
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Old 02-07-2019, 07:48 PM   #2
JSeery
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Default Re: What would u do?

It's striped, I would put a heli-coil or insert in it. You could go to a larger bolt size but there could be a balance issue, but I would think it would be very slight.
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Old 02-07-2019, 08:00 PM   #3
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Default Re: What would u do?

At that small radius, I doubt you would have a balance problem
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Old 02-07-2019, 08:01 PM   #4
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Default Re: What would u do?

At that small radius, I doubt you would have a balance issue.
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Old 02-07-2019, 08:41 PM   #5
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Default Re: What would u do?

Drill and tap four new holes between original holes.
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Old 02-07-2019, 09:58 PM   #6
B-O-B
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Default Re: What would u do?

You might try a metric bolt.
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Old 02-07-2019, 10:32 PM   #7
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Default Re: What would u do?

If there is a metric size smaller than the next fraction size, re-tap for the metric. I would consider also changing the bolt opposite the stripped bolt for balance sake.
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Old 02-08-2019, 07:14 AM   #8
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Default Re: What would u do?

Put a nut on and NO LOCK WASHER.
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Old 02-08-2019, 07:37 AM   #9
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Default Re: What would u do?

Quote:
Originally Posted by JWL View Post
Put a nut on and NO LOCK WASHER.
JWL thanks. just on the one? No balance issues?
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Old 02-08-2019, 08:22 AM   #10
19Fordy
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Default Re: What would u do?

I would try the metric bolt first. If that doesn't work, I would use a helicoil, if possible.
Just curious. What size are the threads and what is their depth? Can you post a photo?
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Old 02-08-2019, 08:27 AM   #11
adileo
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Default Re: What would u do?

Very tight spot. If JWL idea of nut and no lock washer for just the one would work that would be best
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Old 02-08-2019, 11:44 AM   #12
joe 1950
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Default Re: What would u do?

Do all the bolts stick through that far then put nuts on all 4
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Old 02-08-2019, 02:48 PM   #13
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Default Re: What would u do?

Logical advice from joe 1950.
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Old 02-08-2019, 03:14 PM   #14
V12Bill
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Default Re: What would u do?

Is te4 bolt stripped or is the base stripped also? Pull a clean bolt out and try that in the Stripped hole. You may get lucky and only the bolt is stripped. Before putting in a new bolt, run a tap or thread chaser through the hole first to straighten any bent threads.
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Old 02-08-2019, 03:22 PM   #15
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Default Re: What would u do?

Weld up the hole and re tap it.
You don't want the fan coming off later on even though the chances of that are slim.
Do it right and there is one less thing to think about while driving down the highway.
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Old 02-08-2019, 03:41 PM   #16
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Default Re: What would u do?

Thanks guys it was the base that’s stripped. I don’t know how to weld. I added 4 nuts, as suggested, with a dab of lock tight on each.
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1939 Deluxe coupe
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Old 02-08-2019, 03:53 PM   #17
19Fordy
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Default Re: What would u do?

Good solution. You will be safe and sound for many more miles.
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Old 02-08-2019, 07:04 PM   #18
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Default Re: What would u do?

Good solution. "If it ain't broke, don't break it."
Another solution would be to JB weld the bolt into the stripped hole. Three bolts will hold the fan OK and the glued-in bolt would takes care of the balance problem.
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