Round bolt removal

[Peter V.]

Hey guys, does anyone have any ideas that might remove these bolts, I'm working on replacing the master cylinder but it is attached with perfectly round bolts. I was thinking of buying a file so I could square them out and try to put a universal socket on them but I wanted to see if anyone had better ideas.

 

[1967coronet440]

Those are studs or carrier bolts, gonna have to go up under the dash and take the nuts off

 

[Billccm]

Those are studs or carrier bolts, gonna have to go up under the dash and take the nuts off

You are correct, and may I recommend you have two different lengths extensions, two u joints, and maybe even remove the front seat.

 

[Peter V.]

Those are studs or carrier bolts, gonna have to go up under the dash and take the nuts off

You are correct, and may I recommend you have two different lengths extensions, two u joints, and maybe even remove the front seat.

so basically it's going to be a pain to remove them?

 

[PurpleBeeper]

These guys are right....and if you want to go all hillbilly engineering on it, cut those off & replace with grade 8 hardware bolts/nuts when you put the master cylinder back in. They're studs (like wheel studs) with nuts up under the dash.

And yeah, a pain to get at. To get at basically the same thing on my '70 RR (power brake booster nuts) I had to remove my dash to get at the top two. The bottom two aren't that bad to get at.

If you DO go the hillbilly route, you'll probably need some star lock washers on the bolts and have a buddy hold a finger on the bolt heads while you start the nuts (on the master cylinder side). Or maybe you could put a dab of silicone on under the bolt head to "sort of hold it" in place while you start the nuts. Once the star washers grab, the nuts will tighten just fine.

 

[1967coronet440]

so basically it's going to be a pain to remove them?

It won't be bad, get yourself a high quality ratcheting wrench and get down there, once they're broken loose you should be able to finish spinning them off by hand

 

[Speedbird]

Depending on what you want to do and if original look is important,
various permutations of of this are available.
I convert for several reasons.
Not the least of which is easy or maintenance.
http://www.manciniracing.com/macyadplkit.html


There may also be a 4 stud available.
Can't recall.

 

[threewood]

Leave them on untill you get the interior nuts and master cylinder removed. Mount the old mc in a vise and tap those studs out and hopefully you can re-use them on the new mc.

 

[beanhead]

Those are studs, they are pressed through the flange of the master cylinder and have nuts inside the firewall.... Remove the nuts and it will come right out

 

[gkent]

Any suggestion to replace those with regular bolts is ridiculous. Right now its a one-man job, you wedge yourself under the dash and undo the nuts - likewise to put them back on. Replace them with standard bolts and now you need a second person on the firewall side to insert the bolt and hold it with a wrench. Where do these idiotic ideas come from ... I guess "hillbilly" pretty much sums it up!

 

[moparnation74]

I am not understanding why one would want to replace those bolts for a new bolt? Those bolts were made back in the day with real steel. They are pressed in so when you replace the cylinder they do not spin on you. As another said makes it an easy one man job....If your tightening the bolts that tight your afraid to break it, then you are doing something wrong......

Now if you go with an aftermarket kit or a disc brake setup then use what comes with the kit......

 

[Richard Cranium]

Is there an O'Reilly's near you?

 

[coloradodave]

Any suggestion to replace those with regular bolts is ridiculous. Right now its a one-man job, you wedge yourself under the dash and undo the nuts - likewise to put them back on. Replace them with standard bolts and now you need a second person on the firewall side to insert the bolt and hold it with a wrench. Where do these idiotic ideas come from ... I guess "hillbilly" pretty much sums it up!

You have such a way with the English language...Why is it necessary to put down other posters with words like 'ridiculous' and 'idiotic ideas'? Why not just state your piece and let the wisdom of your reasoning shine through?

 

[gkent]

You have such a way with the English language...Why is it necessary to put down other posters with words like 'ridiculous' and 'idiotic ideas'? Why not just state your piece and let the wisdom of your reasoning shine through?

Because some suggestions are utterly ridiculous - arrived at with absolutely no thought or logic.

 

[beanhead]

I agree that the studs should be kept... if possible. HOWEVER many replacement master cylinders have holes that are larger than the original and those studs no longer grip tightly, I've used a tiny dab of JB Weld on the shoulder of the stud, that will hold it enough for you to get the nuts tightened by yourself from inside... unless there's too much slop, then you get into using a larger size and drilling things to fit, or get an aftermarket adapter..you don't want that master cylinder moving around in the future (and good luck trying to find those original style studs)

 

[Richard Cranium]

I agree that the studs should be kept... if possible.

 

[beanhead]

View attachment 424699

That's pernounced deeiiirtay...

 

[dual fours]

You are correct, and may I recommend you have two different lengths extensions, two u joints, and maybe even remove the front seat.

Oh and don't forget the monkey with tiny hands, long thin fingers, good eye sight and can work on it's back all the while being upside down.

 

[Cornpatch MO]

There is tool(s) That will take those inside -under the dash nuts off. You just have to figger out which one and have it in your tool box! ...................MO

 

[Bruzilla]

You are correct, and may I recommend you have two different lengths extensions, two u joints, and maybe even remove the front seat.

That's how I had to do it. And even with all that, there's still a LOT of cursing going on.