repair air valve threads on radiator

lakefruit

Hi Guys. One of my radiator has bad thread. It is so bad that regular 1/8'' tap doesn't work anymore. I looked at internet and found this video that showed to drill a bigger 1/4'' hole and use an ⅛-inch to ¼-inch bushing.
https://www.thisoldhouse.com/how-to/how-to-repair-radiator-air-vent-threads
Has anyone done this before, is it relatively easy for an average ppl? I am kind of afraid that I might damage the radiator.

Thanks

ethicalpaul

I'm a bit above average and I wouldn't hesitate to try it. The biggest thing is getting the npt tap. And don't drill a 1/4" hole, drill the size the tap asks for.

Also regarding your concern about damaging the radiator, sounds like it's already damaged!

lakefruit

@ethicalpaul true. It is already damaged.

Fred

It's done all the time. Buy the right tap and take your time tapping the hole.

ethicalpaul

lakefruit said:

@ethicalpaul true. It is already damaged.

That's when you can afford to be bold! You got this