dntsdad

Anyone know why these brake lines are coiled like this? It would really help if they were straight as I prepare my 3.4 motor to drop in. They are going to be in the way. I was thinking of removing them and replacing with straight/lines that match the contour of the body closer for additional clearance.

Anyone know why they are coiled like this?

peapicker

my understanding of it, is to get a little flex in the lines. They come off the master cylinder that is mounted to the body. The lines coil then are mounted to the frame. There is some movement of the cab or body on the frame when driving and going over obsticles. Thus, there is a need for some flex in the brake lines. I would leave them!

dntsdad

Hmmm..... Ok that makes perfect sense. well if that is its only purpose I wonder if I couldn't just replace that section with a flexible line like a caliper feed line, assuming the fitting are correct.

peapicker

That should work, would go with the braided steal flex line.

Teuf

My guess is cooling, more fluid takes longer to overheat?

Tubbyfatty

I was told they are also for a body lift, they uncoil when you BL the truck. x2 about flex tho.

klbeans

I don't think Toyota engineers would have body lifts top of mind when designing their vehicles. The idea of allowing for body/vehicle flex does make sense though.

Yotapowa

Point is, don't put straight lines in

Matt16

I think its to induce a vortex in the brake fluid so it burns cleaner.

camo31_10.50

LAWLS ^^^

i always thought it was for cooling...but the body and frame flexing seems better LOL

if ya wanna get rid of em just replace em with steel lines..get the good ones with the teflon inside em...makes your brakes less spongy

limon32

You could also have some custom bent in multiple Zs that would lay flat againts the wall and still provide some "spring".

PCE91V64x4

Post #2 is correct. With just straight lines running from body to frame the lines would break with any movement between the frame and body.

James Dean

That is the reason. Simply put, to allow for the flex between frame and body.

ilostmypants

brake fluid dose not circulate.
that's why you can bleed your brakes and get a bunch of burnt up brake fluid down by your rotors and the fluid in the master cylinder is still looking like the day it was new.
witch is why its important to bleed your brakes every now and then because you cant tell the condition of your brake fluid by looking in your master cylinder reservoir.

the coils are for flexibility in the system..

anyone seen stainless lines put on any rigs?
would seem to be the best do it once long term replacement.

Matt16

There is some circulation of brake fluid, or rather a mixing. When I first got my truck, I figured that I'd be lazy and just replace the fluid in the reservoir for the time being. I noticed that the reservoir fluid quickly turned brown. My guess is that convection current is partially responsible for this.

shaeff

Brake fluid certainly does circulate. Not in the ways you might think, but the cheap&lazy way of flushing brake fluid (which I never have and never will do) is to use a turkey baster to remove all fluid from the master cylinder, replace with new. Drive for a few days (it will get dark) do it again. Keep doing it until you've got clean fluid.

It's not as good as a proper flush (which is why I don't do that) but it's better than nothing.

ilostmypants

you might get some particulate moving around in the fluid.
but air(and water) as we all know can become trapped in brake systems very easily.. but the fluid itself doesn't change places or else you wouldn't have to bleed air out of your brakes it would make its way to the MC and then we could just vent it or something but that's not how it works.
its a sealed hydraulic system and except for the fluid that is drawn from the master cylinder reservoir and let back into the reservoir when the brakes are let off. brake fluid is not compressible (has very low rates of compression) and thus it pushes and pulls at the same rate every time you push on the peddle, imagine it working like a bike shifter..

I though this was wrong to and that there must have been at least some circulation of brake fluid. but my college teacher set me strait on that when i spoke up in class. I'm in a 1st year mechanics program,

although a minute amount of circulation must happen because with dot 5 brake fluids witch are silicone based and love to hold onto air and water as dot 5 dose not absorb water is to bleed the brakes then every few weeks for a few weeks the brakes need to be re-bled.

and i dunno about you guys but i have seen tones of cars and trucks where when you bleed thee brakes the first bit of fluid from the lines is black and brown and the stuff in the reservoir still looked new. im just tryin to pass on some info that I had learned, witch i had confused before.

also remember to bleed your clutch every now and then that stuff brakes down too.

i think that makes sense.........