Originally Posted by u102768

Another one for the list - AJ812140 which is the throttle body to heater inlet hose that runs from the front to the back of the engine and sits in the engine valley.

I have just bought one for my car because my supercharger is about to be removed to have the torsion coupler replaced The hose was only £2.99 plus shipping on EBAY so it made to change it as the 'valley' hose seems to be a common fault on earlier models.

Originally Posted by 10XKR

Oh and it has been superseded to part number AJ813614 and costs $18 through Jag.

Originally Posted by Rey

Not so sure you need to replace every single rubber hose. Just replace those which are often noted on this forum.
Hoses/seals leak/fail under pressure. Many pre-war cars had cooling systems that operated with no pressure cap. Boiling point was 212F (sea level). Presurizing the system allows a higher boiling point, but also stresses all rubber hoses. Classic car collectors have often added pressure radiator caps; and found early hose failure.
Hoses today are much more robust.
Consider going to a system with zero pressure. Check out Evans Coolant. It has a much higher boil point than conventional coolants; and operates with no pressure. I have had it for years on my '07 XK with no troubles, leaks, etc.

Originally Posted by BlueFox459

So can I just use this Evans Coolant in place of the regular 50/50 coolant? Is there any other modifications needed to the car to use it? Sounds great.