I've heard of a ball bearing trick to get rid of dents in runner. You're supposed to force the ball through and the dents pop out. What do you use to push it throguh? I want to try this for my exhaust headers but dont know of anything to push it with.

 

Dead blow hammer, or i suppose?

 

More Bearings behind it??Then use hammer of choice??I need to do that myself for the set of headers i use to ground start engines and annoy the nieghbers .

 

How about attaching a cable to the ball bearing long enough to extend all the way through the runner or header tube and pull the ball through?

 

You're going to have to pull rather hard. More bearings is the more common and logical way.

 

Bearings are damn expensive, anyone know of a cheap site?

 

i found this

https://www.thirdgen.org/techbb2/sho...t=runner+dents

 

Call up AS&M or SLP and send you a new set

 

I know somebody makes a "tool" which is a set of steel ***** that get progressively bigger. You start with the smallest one that wont fit through, and just force them through with a hammer until you get to the biggest one which is the diameter of the runner. Might want to search for that, sorry I can't remember where I saw it.

 

Ebay has the ball bearings for $45

 

They're the wrong size! I ordered a set from that guy on ebay and they're too small. Any large dents will look better after running the ***** through, but the dents are still very obvious. If you really want runners that look like new, forget about the ***** on ebay (and the lousy "shim" he includes). The shim is simply a piece of packaging banding that will split before running the ***** through every runner.

37mm is the largest ball that will pass through...and will not make the runners perfect. 38mm is barely too large to pass through.

I don't understand why everyone keeps saying that the professionals use steel *****. If they do, then that's only part of the process. I had Street and Performance remove dents from my runners and the markings inside the runners, where the dents were, had indication of a side to side rocking motion. They must be using a smaller ball on a hardened rod to massage the dents out. They also blast the runners with steel shot to produce a finish that resembles the Corvette runners. This abrasive finish looks good and covers up any scratches and very, very small dings.

 

take them too a shop that polishes horns and other band instruments. they can remove the dents. they have all sorts off tools for just this type of thing. special spoons, ***** ect. it takes some sweet talking but, they can do it

 

I've been meaning to do that. I used to play trumpet for a guy who owns the local Brass and Woodwind repair shop. Got a few sets of runners that need a little work.

 

I think I would be looking around for replacement runners...and driving a bearing through a set of dented headers...no thanks...I would rather replace or live with it than endure the nightmare I envision.