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yea I would take copper, aluminum or rubber any day over crappy plastic..
Non-ferrous metal (copper and aluminum) tube is not a great choice due to failure by work hardening, ie. movement / vibration.
That's why brake lines are steel.
Talking about brake lines, When should the flexible lines to the brake calipers be replaced?
Front flex/hoses are $60 & $80. Rear are a whopping $169 each!
As different lines need replacing due to age and wear, do replace with steel, or steel braided replacements. All fittings are easily sourced at a fasteners shop. And machine shop is happy to fabricate.
As different lines need replacing due to age and wear, do replace with steel, or steel braided replacements. All fittings are easily sourced at a fasteners shop. And machine shop is happy to fabricate.
Every line, hose and tube on my drag car is braided stainless with teflon and AN fittings. It took awhile and some $$$ but it's forever.
Perhaps one of the most important posts recently. Plastic failure can be inconvenient, but in this case, potentially deadly. Thanks for sharing this with all.
There is no emergency brake. Only an electronic parking brake. Only used for.... well, parking.
Trying to engage it while moving will do nothing except make the instrument cluster chime.
The only thing the owners manual says is to only engage the parking brake while moving, in an emergency but this is in the Chassis Technical Guide for the X350/X150/X351 and XF:
Electronic Parking Brake - Dynamic Apply
There are two dynamic apply modes: low speed dynamic
and high speed dynamic. The low speed dynamic mode
operates at speeds between 2 and 20 mph (3 – 32 km/h).
The high speed dynamic mode operates at speeds above
20 mph (32 km/h).
If the parking brake switch is pulled up to the apply posi-
tion and vehicle speed is within the low speed dynamic
range, the EPB module drives the actuator to apply full
parking brake force to the rear wheels.
If the parking brake switch is pulled up to the apply posi-
tion and vehicle speed is within the high speed dynamic
range, the EPB module will apply braking force to the
rear wheels at a slower rate until full braking load is
reached or the switch is released.
The rate with which braking force is applied is controlled
by the EPB module, which monitors both current drawn
by the actuator and positional information from the actu-
ator Hall Effect sensor and compares this to information
held within its configuration software.
Here is the part # C2D7775
I can't believe this little plastic tube is $130
So to replace all of these plastic vacuum tubes on the vehicle is probably going to be a thousand bucks. I wonder how much the aluminum or copper custom tube would cost..
Less probably. When I replaced plastic vacuum lines on my Bentley I used copper tubing and a home depot pipe bender. About $35 for both and I have plenty of tubing left over. Maybe another $25 on compression fittings, oetiker clamps, and silicon tubing for short runs of tight bends. For complicated runs (I didn't replace the whole system, just the main problem line) people would fill the line with sand and bend it as needed.
Last edited by silvertonesx24; Oct 17, 2021 at 07:26 AM.
I have tested the parking brake in my 2011 XK while moving. It works fine... Probably a good idea to test after brakes are done, just be moving very slowly and apply in a low traffic area.
I don't have a recent pic handy, this one is probably from 2008 or so and not cleaned up even a little bit.
Most of the lines and AN fittings I got used from the USAF out of the "Not Suitable For Aircraft Use" scrap cans. True Teflon Lined Tight Braided lines with actual AN fittings, not look-like-it connectors.
However, other things I've done I've used EARL lines and fittings from Summitracing dot com. Many different options!
Copper isnt ideal because it can work harden. But im about to use copper tubing to connect my manual oil pressure gauge up in my cuda so dont listen to me. Lol. Aluminum tube is a no no
but ya the park brake will work in an emergency if its not in the typical fault.
AlexJag! Thank you so much for sharing this! I am going to discuss this with my technicians today and make sure every jaguar that comes in has those tubes inspected. I am so happy you're okay! Definitely was not your time to go!!
I don't have a recent pic handy, this one is probably from 2008 or so and not cleaned up even a little bit.
Most of the lines and AN fittings I got used from the USAF out of the "Not Suitable For Aircraft Use" scrap cans. True Teflon Lined Tight Braided lines with actual AN fittings, not look-like-it connectors.
However, other things I've done I've used EARL lines and fittings from Summitracing dot com. Many different options!
Wow what a day to be alive! Angels must be watching over me!
The title is not an exaggeration!
Yes vacuum brittle plastic tubes in later 5.0 cars can literally kill you as I have found out today!
So I leave my house to play some volleyball today. I live just a few minutes away from the unramp onto the highway which I was planning on using. Before the unramp all the sudden when I try to brake there's nothing there, pedal is all the way down to the floor, car just keeps going as I try to brake "Wtf?" it's going through my mind, luckily I was probably going 10 mph and as I used pretty much all the strength I had in my leg was able to pull over. I turn around and slowly make it back to the house using all the strength in order to stop. I can't even imagine what the scenario would look like if I was coming from the highway with high speed. Examined the car at home and what do I find under the hood.?. Small plastic tube completely separated broke at the t conection.
WTF Jaguar ? At least with the old rubber tubes they would slowly deteriorate not completely fail like this. I had a lot of cars in my life and never had a near complete failure of the braking system as I did in my Jaguar!
Moral of the story if you want to live, replace your vacuum tubes on regular intervals ))
Did it give you an alert on your dash like a red or yellow error message when it happened?
..joke! 
Angels must be watching over me!
