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Old 03-12-2018, 10:52 PM   #1
chrismoore701
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Stripped out heater box

I was replacing my blower motor this weekend and the holes in the box are stripped out. I squirted in some fiber glass resin and drilled out and it did not take. Any thoughts out there? Should i drill out bigger and jam some fibers in the hole? Seemed like the resin did not adhere to the box. I have a 79 c10. Fiberglass box.
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Old 03-12-2018, 11:11 PM   #2
Ziegelsteinfaust
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Re: Stripped out heater box

What about those clip on nuts or using butterfly bolts
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Old 03-13-2018, 03:32 AM   #3
Jaysonb
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Re: Stripped out heater box

I would clean out the resin you put on there, and chop up some fiberglass mat and mix it with some epoxy, then fill and re-drill the holes after it sets up good.
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Old 03-13-2018, 07:24 AM   #4
Bandit130
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Re: Stripped out heater box

Would any of these work for you?

https://www.google.com/search?q=u+nu...EIdzAG#imgrc=_
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Old 03-13-2018, 10:31 AM   #5
chrismoore701
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Re: Stripped out heater box

Those clips could work if i modified the box. The box is flat. But each screw hole has a thicker portion added to give the screw more to bite. I would have to cut these off. An option of my glass fiber option does not work

Thanks
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Old 03-13-2018, 03:36 PM   #6
blindbug
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Re: Stripped out heater box

How about a rivet nut insert?

https://www.amazon.com/dp/B072QWZPWK

Or possibly a threaded nut insert? You can tighten the insert down, clamping it onto the heater box. Add in some loctite or epoxy and it should never come out while backing out a screw.

https://www.amazon.com/dp/B00YJDZ2JS
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Old 03-13-2018, 07:01 PM   #7
v30crewcab
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Re: Stripped out heater box

rotate it slightly and make new holes.
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Old 03-13-2018, 08:09 PM   #8
chrismoore701
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Re: Stripped out heater box

Good ideas. Some things to think about. Thanks guys
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