Yes, I understand the areas where they tend to fail but surely a large amount of coolant would cause an enormous amount of steam unless the engine is off or still very cold?

 

If you are driving properly fast, you might not notice any steam...

 

My sense after reading this and the Land Rover forum over the past 10+ years is many of the coolant issues gave warning for quite some time. A low coolant warning and the owner repeatedly just topped it up. Or driving with low coolant then engine overheating warnings and thought they could do that quick 3 miles back to home / garage etc.

There are both low coolant and engine overheating warnings in the car. Low coolant is an immediate trigger and I doubt that overheating is an average over time - that would be odd! It's a clear red warning sign on the dash

On failures, it is hard to predict. I live in the NE USA with cold winters and hot summers. I've taken the 5.0 V8 in a Jag and in a Land Rover to 100k miles each and 10 years old with only one small pipe issue on the Jag (but several water pumps). No issues on the LR. I also had a V6 SC to 95k before any cooling issues.
I decided against preventative repair even with high mileage use as I felt that careful monitoring of any warnings and coolant levels was sufficient. And I worry about creating a leak somewhere else if someone is digging into the engine bay!

 

plastic will fail 100% of the time. Especially if there are seams. if you ever service your SC, or before you reach 60 k miles spend the 2k + $60 for the aluminum pipes and change them.
While you are at it have velocity AP port and rebuild your super charger . For how much we love these cars and the investment. it is cheap. IF those coolant pipes blow catastrophically with the aluminum block head it is game over. To put it in medical terms I think of it as a widowmaker....

 

Hi All,

After experiencing the coolant pipe failure on my wife's F-Pace, I did the changeover to aluminum pipes and documented in this thread, post #93. I also have a theory on the plastics which I posted in the writeup.
https://www.jaguarforums.com/forum/f...5/#post2836143

One comment on statistics - I am on multiple cars forums and the story along with questions about failure rates is a pretty common topic. For a quick example, the Corvette C8 seems to have a high failure rate of the Tremec DCT transaxle. GM does not (will not) publish any data as to the replacement rate of this $20K unit. For the manufacturer there is no upside to making this data public as it impacts so many things such as law suits, class actions, and sales and resales. If a lawsuit happens GM could be compelled to provide failure rate data, but any of these manufacturers' extensive lawyer teams would fight that tooth and nail. These data probably reach the level of intellectual property in car manufacturers.

 

Had the coolant changed and the system pressure tested (at the dealer) on my 10-yr old 2015 V8s. They did not recommend changing the pipes as there were no leaks...but I do plan on changing them out in the next year or two.

 

You indicate your car's 10 years old and the dealer told you at this point in time it's not necessary to change the coolant pipes. May I ask you for your car's mileage? I'm thinking you have very low mileage on your engine. Look forward to your reply

 

A dealer not upselling on parts and labour? lawd i wish i lived in dallas..almost