General Category > Quadrajet Carb Talk and Tips
how to repair threaded hole in qjet base plate
beertracker:
I updated a previous topic of mine with this but this seems worthy of it's own topic.
While working on the q-jet but disaster struck today. The threads gave way when I was installing a 2.94" x .184" bolt (screw driver slot) in the base plate. I think the base plate is made of aluminum? I didn't even tighten it down the threads just gave way. So how do I repair this threaded hole? Use the next larger diameter bolt keeping the thread pitch the same? The thread pitch is 32 threads\inch.
beertracker:
66 views & no replies. I give up on this site.
Ethan1:
--- Quote from: beertracker on August 12, 2014, 07:01:48 PM ---I updated a previous topic of mine with this but this seems worthy of it's own topic.
While working on the q-jet but disaster struck today. The threads gave way when I was installing a 2.94" x .184" bolt (screw driver slot) in the base plate. I think the base plate is made of aluminum? I didn't even tighten it down the threads just gave way. So how do I repair this threaded hole? Use the next larger diameter bolt keeping the thread pitch the same? The thread pitch is 32 threads\inch.
--- End quote ---
Is it possible to fix the threads you already have? Maybe a helicoil? If not, then I would say, yes, use the next size up. When I tap aluminum, I use a special threading oil called Magic Tap Aluminum. Have had good results with it. I would not give up on this site, bud. I have been busy, as I am sure other's have as well. Give it sometime. :D
429bbf:
ill tell you how i did it . i drilled the hole out to 1/4 in then i tapped it to a 5/16 and threaded a short piece of a 5/16 bolt threads . ground both sides back smooth . (i used bearing mount on the threads )then i set the float bowl back on and marked my center .drilled the proper size hole through the bolt i just installed and tapped it back to a 10/32 it works perfect. i hate to post some of this stuff because most people dont have all the poper tools . the job took to me about an hour. but if you dont have all the tools it could take some folks a day or not even be able to do it. i wish i took pictures , put i would take me a couple of days to fique out how to post them so i dont take them. hope this helps
429bbf:
just one more note . i dont know if many people have ever seen them . there called( thin wall inserts )there made by jergens inc. you can get them in quite a few sizes. also metric . theyre not cheap. i hate helicoils but once in a while you dont have enough material to use an insert so you have to use them. fwiw
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