having too much trouble trying to find an adapter [Archive]

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demonpixel

10-11-2009, 12:14 PM

My proportioning valve only has 3/8"-24 fittings coming out it:

https://static1.pt-content.com/images/pt/2009/10/sumg3910_cp-1.jpg

My rear brake line fitting is M12x1.5:

https://static1.pt-content.com/images/pt/2009/10/brake_line_fittings2-1.jpg

This is on 6mm line. Does anyone know how can I adapt the M12x1.5 fitting to a 3/8"-24? I've been trying to find an adapter but I'm having no luck at all.

Thanks for any help/advice!

Vegas69

10-11-2009, 12:18 PM

Cut the line and install the correct fitting and reflare or replace that entire line.

novaderrik

10-11-2009, 12:25 PM

any decent auto parts store will have a weatherhead cabinet full of adapters like that. skip the autozones and pep boys and head to a NAPA or similar.

demonpixel

10-11-2009, 04:24 PM

JRouche

10-11-2009, 05:25 PM

Checked two Napas, the closest I saw was an M12x1.0. It did not work. I'm trying to use a 1/4" fitting now, but the flaring tool keeps pushing the tube down, and we squeezed the two sections of the clamping tool down extremely tight. is it because 6mm tube is slightly smaller than 1/4"?

The problem with many flaring tools is not enough clamping force on the tube. And you are even worse for wear cause the tube is so small.

What would I do?? Im a hack so hang on. I would take a snip of copper tubing, say a 1/4" line and split it in half. Take the two pieces and use them as shoes to grip the tube. If it looks like the "shoes" are too thick drill out the tube to thin the wall on the next try, before splitting it.

Want an easier method of holding the tube in place. Sand paper. Cut out a piece of fine (440 grit) sand paper and wrap the tube with it. Abrasive side to the tube. And if it still slips I would reverse it and try that. Maybe even apply a lil glue on the non-abrasive side, a lil contact adhesive. Maybe glue two sheets of abrasive film together. Abrasive sides out.

A lil double sided abrasive film would be cool.

All types of ways to grip the thin tube. Me?? I have some machines. I might just make up some new dies. With TEETH!! JR

MonzaRacer

10-11-2009, 07:29 PM

Well I have a hydraulic flaring tool from mastercool.
I would try using a ISO (bubble flare) clamp bars. care must be used as an ISO flare has less back angle (as in 45 degree) made into the bar.
so then you may be able to achieve a true 45 degree flare, just make sure the double flare makes good contact with the nut.
You would still use the small pieces that come with double flare kits.

demonpixel

10-11-2009, 07:33 PM

The problem with many flaring tools is not enough clamping force on the tube. And you are even worse for wear cause the tube is so small.

What would I do?? Im a hack so hang on. I would take a snip of copper tubing, say a 1/4" line and split it in half. Take the two pieces and use them as shoes to grip the tube. If it looks like the "shoes" are too thick drill out the tube to thin the wall on the next try, before splitting it.

Want an easier method of holding the tube in place. Sand paper. Cut out a piece of fine (440 grit) sand paper and wrap the tube with it. Abrasive side to the tube. And if it still slips I would reverse it and try that. Maybe even apply a lil glue on the non-abrasive side, a lil contact adhesive. Maybe glue two sheets of abrasive film together. Abrasive sides out.

A lil double sided abrasive film would be cool.

All types of ways to grip the thin tube. Me?? I have some machines. I might just make up some new dies. With TEETH!! JR

All great ideas, JR! I thought about giving the tube some thickness too. I tried teflon tape wrapped around it 50 times. It flared the tape REALLY well, but was still pushing down on the tube. lol I didn't have any copper/thin metal at a 1/4" and the hardware stores were closed by the time the idea lightbulbed into my head. Tomorrow I'll get a proper Metric flaring set with a 6mm die, and a Standard flaring set, and see how that goes.

Having said that, I am STILL going to use a 1/4" fitting on the 6mm tube, double flare it, because the standard fittings are MUCH easier to find. I found an adapter from NAPA for a 1/4" to 3/16".

Anyone see a problem using a 1/4" fitting on a 6mm tube with a double flare?

MonzaRacer

10-11-2009, 09:31 PM

No I have done it, as long as the flare is square and round(ie didnt push offside) your good.

Skip Fix

10-12-2009, 07:58 AM

The problem with many flaring tools is not enough clamping force on the tube.

Amen I have two different brands of double flare tools and both push the tubing out.

Check Speedway they have a bunch of fitting also.

gort69

10-12-2009, 09:10 PM

Get a Ridgid 345 flaring tool. Use the double flare dies from your other set. This is an excellent flaring tool with an excellent clamping system. About $50 @ Home Depot. It does NOT come with the double flare dies.

http://www.ridgid.com/Tools/345-Flaring-Tool#

http://www.camaros.net/forums/showthread.php?t=145621

demonpixel

10-14-2009, 06:58 PM

Guys, thanks for all the help! :cheers: I got that 1/4" fitting on, and a brand new flaring tool does wonders. I now have the two lines from the master cylinder (w/fittings) routed to the Summit proportioning valve, and the rear brake line with the 1/4" fitting (to 1/4"-3/16" adapter) to the proportioning valve. Now I just have to tighten them up, but before I do that, I wanted to ask...

Should I put Teflon tape on the threads, or do you guys install them dry? (This is my first time doing brake lines so I don't know.)

b-man

10-14-2009, 07:56 PM

No Teflon tape, that is used to help seal tapered pipe threads and only in certain instances.

The tube nut threads don't do any sealing on brake line fittings, they merely serve to clamp the tubing and fitting flares together to form a seal.

demonpixel

10-14-2009, 09:02 PM