Hi can any body tell me what the part number is for the valley pipe . I have a number of AJ89746 but that comes up as throttle body return hose . Also if I'm taking all this off what gaskets and pipes should I consider replacing while it's all off ?

 

That looks right, see also https://www.jaguarforums.com/forum/s...rchid=14051285

Something like:

thermostat AJ8 6484 39.60
seal-thermostat NCA2246BA 3.55
antifreeze red JLM 20972/3 28.93
gasket AJ8 3445 5.69
hose-heater AJ8 9746 11.79

Or:

seal-water O C2C 11477 *2 6.55ea
aka C2C11477 water outlet seal *2
gasket AJ8 3292 7.46
seal-outlet NCC7735BA 35.52
seal-duct AJ8 6892 *2 28.44ea
plug-blankin XR8 2652 *7 2.45ea

I think this lists about the same ones http://www.jaguarforums.com/forum/s-...-102914/page2/

 

There are two hoses under the charger. The one you mention then another that goes to the egr valve and a short hose connecting the circiut from throttle body to egr valve Jagv8 list is all you should need. The egr hose can be found on the egr valve parts blow up on jpec or jaguarlandroverclassic.com

 

the diagram shows 4 feed pipes the top 2 are EGR to throttle coolant, the bottom 2 are water outlet to egr

 

go by vin number and it will single them out

 

That part number in your first post for the EGR cooling hose that sits under the supercharger was correct for my car. And I only found just this coolant hose under the supercharger in my x202 STR, not sure in your later STR if there were more coolant hoses to be found under there? Others will confirm.
I am familiar with that Jaguar diagram you have attached. Without the knowledge of actually pulling everything apart and seeing what's in there, it can be a confusing diagram. Number '2' and number '6' were not relevant for my car.
I did buy a swag of new gaskets. But, all the original ones that I removed were in excellent condition so I cleaned them and put them all back except for the steel gasket that sits on the bottom/under of part number '3' above; which is connected to the exhaust manifold. Be careful choosing the right one of this gasket for your year as there are to memory, 2 types; one for the earlier STR's and a slightly different one for the later. It changed because the base of part number '3' above had a change.
I had previously replaced a sticking thermostat before I did the valley hose so I did not 'split' the thermostat housing assembly when I went back and did the valley hose; I found I could remove the thermostat assembly as a 'whole'. The 2 water outlet seals that sit behind the thermostat housing will need to be replaced.
The valley hose in my car had not actually ruptured and had quite a bit of life still left in it but the short right angled thermostat to engine hose had become very soft and eventually ruptured. Before it ruptured I actually knew it had became soft and should have changed it immediately. The obvious happened and it left me stranded a mile or so from home fortunately. Rather than a tow, I waited for things to cool down, topped the system up, drove home without the pressure cap... Luckily all was okay but since I had to change the small hose I thought I would go in and do the valley hose whilst at it.
You've likely read up on changing the average plastic hose inlet to intake elbow design to a more sturdy, permanent set up.



Hoses I found above supercharger, convulated plastic air hose and coolant hose. The convulated plastic hose running from top to bottom of the picture (with the cracks in it) is one of the looms.

Sole (EGR) cooling hose found under supercharger, top of photo.

You will need to either repair this weak point or modify, as many have done.

Bottom of EGR valve tube on my x202, which should be different to your later car thus requiring a different gasket.

Bottom of EGR valve tube gasket which is the only gasket I changed.