I measured my brake lines at the distribution blocks inside the left front fender on the frame rail, and the tubes measure out to roughly 0.200 on my measuring calipers. 3/16 tube is 0.1875 and 4.75mm tube is 0.1870. so which is it, and are they double flare or bubble flare?

Also, the nuts, to my best guess, measured out 1/2" flat to flat.

So are the lines 3/16 OD with 3/8-24 double flare nut or 4.75mm OD with 10.0 x 1.0 bubble flare nut?

I want to put a pair of line-locks on my truck- one on the front for burnout, and one on the back to be engaged with front for holding the truck (in leu of transbrake). The line lock module has 1/8 NPT fittings, and I can order either 3/8-24 double flare adapter fittings or 10.0 x 1.0 bubble flare fittings.

 

I have had a lot of front brake issues as of lately and found out that from the master cylinder down to where it goes into the splitter block is one type of flare. The block has the same flare opening on all 3 sides. Then the other end where it goes into the brake hoses is another type. Don't know which is which or the size. I just know that they are different. 97 3.9 4x4.

 

I don't quite understand, you say the splitter blocks have the same flare on all 3 sides front and 2 sides rear, but the hoses have different flares? Or do you mean the threads are the same but the MC side is double flare and wheel sides are bubble flares or vise versa?

The double flare makes like a V in the hose, bubble looks like just that, a bubble with a hole knocked in the end.

Did you find the fittings to be 12mm, 1/2", or 13mm?

For the record I am interested in the side from the master cylinder.

 

I haven't had mine apart in a while, but I'm pretty sure I remember it having metric bubble flares. With yours being newer, I would think it's almost a guarantee.

 

that's what I was expecting. So would the nut be metric 10.0x1.0 then?

These are the 2 fittings I can get:

10.0 x 1.0 mm bubble flare- http://www.pacificcustoms.com/cnc896.html

3/8 - 24 inverted flare- http://www.jegs.com/i/Wilwood/950/220-0628/10002/-1

Line lock- http://www.jegs.com/i/JEGS+Performan...63000/10002/-1

 

10mm sounds right, but 1.0 seems like awfully fine thread for a 10mm fitting (to me, anyway).

 

that's the standard brake metric fitting. Either the nut was metric or it wasn't…haha.

I found a set of 15" wheels for $50 each at local junkyard thanks to carparts.com or whatever it is. Now I just have to find a pair of 185/75-15 or 195/70-15 or 205/65-15 or 205/70-15 tires to put on them for front runners, and get my friend's 28-9-15 DOT slicks out of the back corner of his tire rack and hope that the $225 or so tire/wheel investment + ~$150 for the line locks and fittings pays off in some better looking time slips and more consistency. I haven't even hit the track since I spooled it, but the 2 times we went with the dragster, it was effectively a skating rink.

 

My bad I could have used better terminology . I'll place link to pics

The actual front brake splitter located on the frame on driver side

Pic 01
https://www.dropbox.com/s/hhfthqthj8...nd%20right.JPG

Pic 02
https://www.dropbox.com/s/pocjq61l7z...ide%20shot.jpg

Uses this type of flare on all 3 sides (its the same piece just different angles)

Pic 03

https://www.dropbox.com/s/odwtgxyjg0...20splitter.JPG

Pic 04

https://www.dropbox.com/s/fefe967s28...20splitter.jpg

Pic 05

https://www.dropbox.com/s/adosip3879...20splitter.jpg


The end that goes into the brake HOSE has this type of flare. (Again same piece just different angles)

Pic 06

https://www.dropbox.com/s/lcmx0aic47...20line%201.jpg

Pic 07

https://www.dropbox.com/s/21e760jdgk...20line%202.jpg


I don't have a pic of the flare of the line coming off the Combination Valve. But I do have Pics of the Combination valve and RWAL Valve. I labeled them. Sorry it is labeled so crudely but it is what it is.

Pic 08

https://www.dropbox.com/s/xo62s3s68j...nder%20top.JPG

Pic 09

https://www.dropbox.com/s/s4hwwguswc...20of%20CAB.JPG

Lets hope the links to the pics get posted up and can be opened or this is a waste of my time and yours.

 

Perfect. So the splitter side is bubble flare and wheel side is inverted flare. Now I can only hope the block is metric thread......

Your stuff looks rusted as hell...I'm surprised you didn't just shred it taking it apart....

 

3/8 inch = 9.52 mm
24 threads per inch = 1.06 mm per thread