Does it hurt anything running brake lines higher than the master cylinder? My brake lines from my mc to my prop/dist block may end up going higher than the bowl on the mc. Is this going to cause any problemswhen Iget to bleeding the brakes or air ever entering the line? Is there some rule on the "never-ever-do" list, like run brake lines higher than the mc? I don't want to get these lines installed then have to redo them. thanks in advance!

 

You can't get them bled properly if you do that.

 

I would mount the proportioning & distribution valve right below the master cylinder if possible. That way you do not have bleeding/priming issues.

 

That's what I was thinking. It didn't make a lot of sense that I could run them higher than the mc. I looked at the lines on my other vehicles and they stay below the mc. I figured I should too. The only issue I have is running from the mc to the prop.dist block. It is already mounted on the firewall, left next to the booster (towards center), it isn't higher than the mc. Shouldn't be a problem, I'll just bend them down and around and into the prop block. thanks for the info.

 

I put ours right under the hood hinge....

If it were higher than the MC, you could probably bleed it by cracking the lines.. but lower will be better....

Any fans of DOT 5 brake fluid here? I like the fact that it does not eat paint... it would suck to mount it high and have it bleed all over everything...

 

The first time I ever did custom lines I had a very slight rise in one of the tube coming out of the MC. I tried bleeding the system for a day or so and had no luck getting it to work properly. Once I finally realized what I had done wrong, I modified that line and had the brakes bled properly shortly after that.

I used the DOT 5 fluid in my system, and it works great. My engine compartment is painted just like the exterior paint, so I didn't want to risk getting any fluid on it and ruining the paint. I don't see any downside to the DOT 5.

 

right. Some brake manufactuers recommend certain types of brake fluid. The only place brake fluid ever would come out is at the bleeders right? Unless there is a leak somewhere after the initial install, but once the system is bled, there should never be any leaks. So is the "higher" performance brake fluid better or DOT 5 ok? Other than the paint stripping effects of some brake fluids, are they that better?

 

You are right that brake fluid is only supposed to come from the bleeders, but be careful, sometimes on new installations,the inverted flare lines and fittings need a little "seating".

In my experience, it is not unusual for new lines to require a second tightening before they totallystop leaking.

I like the DOT 5 because it does not munch paint, and it does not absorb water. I have heard it said that Dot 5 is prone to hold tiny air bubbles for some time, and may require a second bleed once this settles out some.