what size wrench for flare nuts on mc?

[BBB]

I'm trying to replace the mc and I'm having trouble getting the hard lines disconnected. I tried a 10mm open end wrench and it was a little sloppy and just rounded over the corners. 9mm is too small, 3/8" also too small. So I went and bought a flare nut wrench. Same thing 10mm too sloppy, 9mm and 3/8" too small. What gives? How did you guys do it?

[Kingman]

They're 10MM nuts, but when they're rounded off they become smaller. I've never had a problem removing them. If you have a really small Crescent wrench I'd give that a shot but I don't think there's room for that.

 

What kind of wrench do you have, a cheap China made or a good one? There's a difference, I have a Harbor Freight 10MM wrench that is larger than it should be, and one that is slightly smaller.

Edited April 8, 2013 by Kingman

[unccpathfinder]

10mm brake line wrench...if already rounded off then vice grips....

[BBB]

What kind of wrench do you have, a cheap China made or a good one? There's a difference,

Agreed. I have a couple different brands of wrenches probably made in China. The flare wrenches were brand new Craftsmen, tried them out in the parking lot at Sears.

[BBB]

10mm brake line wrench...if already rounded off then vice grips....

Well, I didn't want to do it but I ended up having to use vice grips. They were really tight, either seized or installed too tight.