Brake Duct Hose Replacement

Nice write-up, Richel.

 

Some great tips, thanks, Richel (especially using aircraft ducting).

Isn't that the windscreen washer reservoir?


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Good stuff right here. I need to replace both brake ducts on the front of my 456GT..... this is a great alternative!

 

This is great. My dad's 550 had standard clothing dryer hose installed by the pervious owner. Its always drives me crazy. Just ordered some of the hose you found. NICE WORK!
Adam

 

Great thread! Exactly the tutoriali hoped for!

Was 2.5' hose plenty for each side or did you have to stretch.. in other words can i get away with ordering 1 five foot length and cutting myself or should i go for 2 three foot sections?

3 inch shrink tubing? Or larger?

 

Did thia last night. Nice project. Couple observations or techniques for anyone else about to take this on.

My car is a 456GT

The 3 1/4" ducting is great stuff, very durable, but also slightly oversized

Definitely dont remove too much wire from the new tubes. I extraced out about 3+ inches from each end and wish i had left more. Made it a little sloppy sliding the ends on.

When removing the wire, i first tried to split the inner and outter layers, but ultimately trimmed out the inner layer, as it was just easier to work with sliding only 1 layer into place on each end

Left side was extremely tight getting around the oil reservoir and hoses. Like really tight, had to manhandle the new tube to get enough forward towards the bumper. Easy enough to slide things into place and get the clamp back on.

On the right side there is nearly no room to access the bumper side hookup, as stated above. I couldn't see a reasonable way even moving the Washer reservoir would help, nor a place to move it. Too many other things in the way. Perhaps this is a 456 vs 550 difference

I already have my front driving light removed for replacement, and that hole geve me perfect space to access the clamp and get the tube installed.

Again right side was tight around the power steering reservoir. To give myself a little more room, i unscrewed 2 sensors attached to the PS bracket. This helped immensly. Installing the hose this time i 'theaded' the tube into place by spinning it. That worked much better than force. The toughest part of that one was trying to balance the clamp from underneath, basically with a fingertip, while reaching through the bumper with my other hand and wrachet to tighten.

Working underneath my lift, i left the wheels on and didnt need to remove the metal duct at the wheel assembly. Removing the forward wheel liner was a real help.

Glad this is done! Old hoses were trashed, and even the untouched portions pretty much fell apart when removed
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@Aerosurfer did you heat the shrink tubing on the ends before you installed? How did you do that without shrinking the ducting too much? I am ordering now for my 456..... Thanks, Lance

 

Thanks Nick! My front passenger side hose is also in similar condition. Trying to figure out what I need to do.
What did you need to remove to access the hose?
It sounded like it was a really tight space, any additional tips?
If lots of stuff need to be moved, replace both?

 

I removed the front lower tray and had both parking light assemblies out, and if I remember correctly, I also had the forward wheel well panel removed on each side. I would also put the headlights up and turn off the power at the battery switch, it should give a little more room to reach in.

I didn’t and I am paying for it now…. When I did my tubes, I didn’t remove the wheels and instead did it all from underneath while it was on my lift. I was able to muscle them on, but it’s a weird fitment with oblong angles and different turns. Both sides have started tearing again. I will see if I can salvage it with the shrink, but likely will redo it next winter and properly fit the brake sides with the wheels off. Live and learn… like so much on these cars, no repair is necessarily quick or always direct, but doing right is still the best way.

 

Great work! Where do you source the ducts?

 

https://www.aircraftspruce.com/catalog/pnpages/05-30513-3.php

 

Update: the original part for the 456 (i.e. 177780) is now officially NLA.

I went ahead and bought 5 ft of CEET-13 DUCTING (3 1/4" ID) per your recommendation to split in half. Thanks

 

Love this forum for threads like this! I also followed the recipe on my 456M and installed the very nice aircraft spruce ducting. Here’s pix of my journey. I ended up keeping the wires continuing to the ends on the ducts and overlaying the shrink tape. They compressed just fine around the inlet profiles and don’t see an issue / but maybe I’ll get surprised. Thanks to the OP and Aerosurfer for all this and so much more!
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Very nice. Did you use 4in/100mm shrink tubing or larger?

 

Fantastic work!

 

Love the shrink ducting.

 

Following another threads recommendation I used 4” diameter and it worked great. Any will do.


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