Vintage flame arrestor repair

A buddy of mine bought 4 of these on Ebay.

But the seller forgot to mention that some of the drilled & tapped holes were messed up.



So I made an adapter on my lathe that fit snugly on the side that normally slides on to the carb.

And then I drilled and tapped the adapter to accept one of the studs that I use to clamp pieces on my mill.



This is how the clamp bolts on.



And this is with the body of the arrestor in place.

 

Now I had someting to hold the Arrestor with.

I put the adapter in the vice on my mill, and leveled the mounting surface with my protractor.



Then I used a centerdrill to find the middle of the hole.



And milled it out to 3/8".



On the vice you can see the 3/8" plug I made that is tapped 10-32 like the original hole was

 

Plug in place, and welded on the inside.



Not to much damage to the original polish.

It should clean up without too much trouble.






1 down, 7 more to go...

 

A couple more done...

 

Wow, a lot of precise work. What are they going on? They're unusual looking...any idea what company made them & age?

 

Not sure who made them... But they are going on a set of 4 Rochester 2GC carbs.... The carbs are going on an intake that I'm building for a Big Block Chevy. The BBC is in a Chopped, Channeled, 60's style 32 5 window.... It belongs to StinkyPete on here. I'm sure he'll post up soon.... Once I get a little further along on the intake I'll start a Tech thread on it. The scoops look awesome Alex!!!!

 

I finished them today.

So here are some more pics...

Making the plugs I used a piece of 3/8" aluminum bar, but it was slightly oversize so I made the Dia smaller untill I had a nice snug fit.
( that by itself would have been about enough to hold the lid on )



Drilled, tapped, rounded off on one side, etc...



Once the flame arrestors were clamped down and leveled out, it turned out that the holes were more than 1/8" off from body to body, and side to side.

So that means that each lids was mated to one body, and cant be mounted upside down because that would affect the way they fit.

So I had to find the centerline of each original drilled hole before I milled it out oversize.



welded.

 

Thanks.

 

thats pretty cool! they look great!

 

Nice,making them as good as new. My hillbilly mind would never get past cutting the heads off 10-32 screws,epoxy them into the buggered holes and use a nut to hold on the frame