Side mirror stud repair?

[MakeMineaMonte]

One of my side mirrors was knocked off yesterday. It looks like the two studs that bolt it to the door didn’t “break”, but actually came out of their respective holes. I can see any break, but it also doesn’t look threaded unless the threads all sheared off. Is there a known way to repair this? Are there new studs you can buy? Fill, drill, and tap for threaded rod? What size? Weld in new rod? Anyone have experience with this?

 

[pagrunt]

A metric tap & blue thread locker if the mount holes didn't get all the threads shaved out when the studs pulled out.

 

[Ribbedroof]

A metric tap & blue thread locker if the mount holes didn't get all the threads shaved out when the studs pulled out.

And if they did, I'd say panel bond

 

[78Delta88]

I wouldn't use threaded rod. Better to use stud. Typical local hardware store will have this. Plus you can find off sized studs such as 5/16 x 1/4 x 2" or 8mm × 6mm x 50mm. Course or fine thread. You want fine thread to go in the holes, course though the door. Use the nylon lock nut and don't over torque.

A good epoxy then drill and tap and thread locker like suggested. All you are doing is replacing the threads that got pulled out, then just reattach it to the door.

You are fortunate that all the structure is still present. When the bosses get torn off, you have to rebuild and reset it to install the stud, and a lot of times repair doesn't take very well.

 

[78Delta88]

On the damage to the mirror...

Wash with dish soap and water. Clean out the scratched up areas with small stainless steel wire brush.

Sand area of repair with 80 grit then 120, then 220. Clean area with a little alcohol or acetone, and fill with spot putty sand with 320 once dry. You might have to do several applications as you want to do in light layers.

Once you get the scratches filled sand to 320 and then to 400. Spray whole thing with filler primer and sand 400/600. Then primer sealer and sand to 600. Duplicolor should match it if OEM.

Sounds like a lot, but if done right you will have good looking mirror reattached.

 

[SS_Malibu]

That happened to my driver side mirror. It pulled the threads out when it happened. I just tapped it to a bigger size, threaded a longer bolt into it with the strongest thread locker (red I think) so it will never come out, cut the bolt head off to make it a stud and bolted it back on the door. It's been tight ever since.

 

[Ugly1]

If all else fails, Flex Glue!! But honestly unless you get a used one, what the guys said is best to go for.

 

[Longroof79]

Another solution would be to use a threaded insert, Drill and tap it oversize, install the threaded insert and reinstall the stud.
On my wagon's rear hatch handle, which is also pot metal like the mirror, I used JB Weld and re-tapped it. It seems to hold pretty well, to my surprise.
I ended up using an S-10 handle which uses larger bolts. I made an insert using a piece of steel tubing. Threaded it to fit the oversize and tapped the inside of the tubing to fit the proper size bolts. Worked like a charm.
Thank you again to my friend Mich (Mikester) for sending me the S10 handle.

 

[Ugly1]

Another solution would be to use a threaded insert, Drill and tap it oversize, install the threaded insert and reinstall the stud.
On my wagon's rear hatch handle, which is also pot metal like the mirror, I used JB Weld and re-tapped it. It seems to hold pretty well, to my surprise.
I ended up using an S-10 handle which uses larger bolts. I made an insert using a piece of steel tubing. Threaded it to fit the oversize and tapped the inside of the tubing to fit the proper size bolts. Worked like a charm.
Thank you again to my friend Mich (Mikester) for sending me the S10 handle.

Would anyone think he could use a helicoil on it? Just WAI ( Wild A$$ Idea)

 

[78Delta88]

I'm thinking helicoil would work just fine. Having not done it in this application is why I didn't suggest it.