Fitting A New Brake System to a 1970 IIA 88

[Tim Smith]

...Tim – If I ever buy that tool, I’ll be sure to PM you. No rental fee required.

Get it! Get it! Get it!

[jac04]

Given what I’ve learned, I'll be going with copper-nickel, double flaring throughout..

I'm still not sure where you learned that a double flare can be used in place of a bubble flare. They are not interchangeable. It's you brake system, so I'll stop bothering you about this now.

[SafeAirOne]

I'm still not sure where you learned that a double flare can be used in place of a bubble flare. They are not interchangeable. It's you brake system, so I'll stop bothering you about this now.

I was kind of wondering the same thing. While you may be able to convert the flare types on lines and fittings, you won't be able to change a wheel or master cylinder without machining it.

Double flares are "innies" whereas bubble flares are "outies".

Now the SAE convex bubble flare can be converted to the better DIN bubble flare pretty easily...

[I Leak Oil]

I'm still not sure where you learned that a double flare can be used in place of a bubble flare. They are not interchangeable. It's you brake system, so I'll stop bothering you about this now.

I suppose if you crank the crap out of the fittings you could get it to seal. You might never be able to get it apart or to reseal buy hey, what's a little money here or there? It's just as easy to make the correct flare as it is to make the wrong flare. And like most things in life it's just easier to put a round peg in a round hole.

[thixon]

I Leak Oil, both doubles and bubbles have a limited lifespan.

Jack IIa, use the method I described to you and you'll end up with a very easy to seal, almost correct flare. Its damn close to a bubble flare. A double flare will work, but you're not gonna get everyone to seal up tight. I've watched people do it too many times. You're success ratio will be about 70/30 on the bubble flares. In short, its a giant butt to make them with the standard tool you probably have.

I wasn't gonna bring this up, but what the heck. I know of a bunch of brit cars running SINGLE flares in place of the correct bubble flares. Go figure.

[I Leak Oil]

I Leak Oil, both doubles and bubbles have a limited lifespan.

I understand that, been there done that, but using the wrong flare usually turns the line you just made into a single use item, if you can even get it to seal.

What I don't understand is knowingly trying to use a different flare when the tools exist to do it right. That's just my opinion and it wouldn't happen on my truck. Again, that's just me.

[thixon]

I understand that, been there done that, but using the wrong flare usually turns the line you just made into a single use item, if you can even get it to seal.

What I don't understand is knowingly trying to use a different flare when the tools exist to do it right. That's just my opinion and it wouldn't happen on my truck. Again, that's just me.

Agreed.

Its funny, the guys I know who are running single flares did so because it was "easier" to seal up by cranking the fitting down tight as all heck. I don't get it, but oh well.

[JackIIA]

Well...I DID say I was looking for input...maybe wasn't expecting quite so much .

To do it completely by the book, I admit, my approach is not correct, but that doesn't mean it's not safe. Using copper-nickel allows the flaring to slightly mushroom. There are pipes that were originally one set of flarings and I've seen LR replacements with different flarings. Both are Land Rover issued, both the same part number. No change to required fittings, nor mention switch them. I know of others on this site whose opinions I respect have run double throughout their trucks without issue.

Could I use the RN steel lines and avoid all this? Yes. I don't want to touch the brake lines again though. And I don't have access to a flaring tool with a SAE Convex die. The solution might be to run DIN Flares, and I won't rule it out - double original got in my head because it was mentioned as the 'standard' flare on all series - obviously not the case.

Going with the DIN flare, you'd have the same problem to be true to the original though...running doubles in some places. The best compromise between the two is admittedly automec. I'll revisit it, and if it makes sense for my needs, I'll reconsider it. I'm not proud . Thanks all.

[I Leak Oil]

Well...I DID say I was looking for input...maybe wasn't expecting quite so much .

Brake line flares....Such interesting reading I keep brake tubing supply catalogs in the crapper! Just kidding...kinda...