Hi X250 Forum & 5.0L S/C Owners!

Background & Premise:
I wanted a place where I could reference a list of every cooling system part for the 5.0L s/c engine. After poking around here and some other forums, I found a lot of great threads on certain cooling system parts/jobs (like Big Will's Water Pump thread) but nothing that just covered it all in one spot. I found myself comparing dates and parts and getting really overwhelmed with knowing what I was ordering. After tearing apart my car this past month and documenting as much as I could, I got to work searching online and ordering parts from a few online vendors. This was a major project and effort, but I realized I was logging it all and others might find this useful. A lot of online retailers offer the parts we need for these cars, but the diagrams, images, or descriptions aren't always crystal clear and this can quickly discourage an average DIY'er from a project. I have attempted to remedy that for anyone who wants to completely overhaul their system in the future and save some $$$ by not going to an indy or dealership. I wanted one place where someone could see the parts, compare part #'s, get an idea of cost, and serve as a discussion for any updates, upgraded parts, or revisions in the future. With these cars becoming affordable to purchase, and more DIY'ers taking possession, I wanted to "give back" to this forum since it has helped me learn so much. There are so many parts and a lot of them have plastic that is prone to breaking over time, so read on if you are ready to tackle some repairs/preventative maintenance.

What's all here:
A comprehensive breakdown of the cooling system on my car - a 2015 XFR-S 5.0L S/C AJ133, which is the last year of the X250 generation, and the "top-trim".

While most of the parts are the same across all AJ133 cars, there are a few updates and revisions which I will cover in more detail below. Always verify parts on your car or fitment before ordering or taking this as gospel! Attached to this post is an excel file and included below is a collection of labeled images. I have laid out my stock removed parts to mimic the engine layout for easier visualization. I have sorted everything into groups, based on function (IE - Supercharger cooling, Water Pump, Reservoir). Since the various OEM Retailer online catalogs use multiple images and sections with duplicated # labels, I have generated my own label/numbering system based on those functional areas. Simply use the Label in column 2 of the excel sheet, and compare that to the labeled part in my images to confirm you are ordering the correct part for your car. Column G in the excel file, labeled "Jag Part #" is the current revision I used/ordered as of Sept, 2021. There are also hyper linked to each product page on oemvehicleparts.com.

**Note**: The original part numbers (column D) are what I pulled off of my car, I then compared them to the part written/printed on the NEW parts received (Column E). Anything that has an (*) in column F indicates an updated number was observed. Use these to compare to what is on YOUR CAR, but order new parts only using the interchange number found in column G. PLEASE USE THIS GUIDE AT YOUR OWN RISK. I am just a regular guy who likes doing stuff like this but I am by no means a Jaguar specialist or dealer rep! I am not responsible for any incorrect or outdated parts. Everything I have listed here I have purchased or observed in person, and feel confident in sharing.

Some Specific Call Outs:
1) The XFR-S (and some XFR's) have dual aux radiators. A DS and PS unit, connected to the main radiator via long hoses.
2) The Outlet "Y-Pipe" from block to upper crossover has I believe three versions. I have pictured the later two plastic versions only. Early cars were metal, then there was plastic with a metal coupler, and then just two plastic pieces moving forward. Be sure to check what version your car has as they are not interchangeable. See comparison photos below of the two later plastic versions. One that was removed, and the replacement Jaguar sent me.
3) URO parts has remade the water pump outlet tube in aluminum. This failure prone part cracks and leaks. I have included BOTH in the list/images for your convenience
4) My car, is a 2015 and therefore it had an updated Aux Coolant/Supercharger Pump. This is a pulse width modulated design, so please make sure you know what your car has, as the lower hose varies in length if you have this pump.
5) Every part is pictured as it is "ordered" so some parts come as small kits, like the lower radiator/t-stat hose.
6) The Heater Hose assembly (hard metal lines on PS of engine bay). Is NOT pictured, but it is listed (item #E5)
7) Red Lines show where any two parts might connect, and red circles show connections from another image

Images:

 

Hats off to @DeviLSh

Mods, sticky this.

 

Holy smokes. And i thought my 06 4.2 supercharged was a coolant system nightmare. I do like the extra intercooler radiators. Excellent post by the way

 

You sir, you are my hero,
Thanks a million for this!!!!!!!! I wish I could thank you enough


Moders please sticky this.

 

Fantastic post, extremely helpful and well laid out. I am wondering if I am seeing something correctly. Is the hose SC4 directly connecting the intercooler and the radiator with them sharing coolant? On my 2011 XFR I realize the systems are connected but I did not think it was that direct of a connection. Thank you again and I agree that this should be a sticky.

 

Well you certainly earned your "Expert" activity badge with that post!!
Great job and I will be adding this extra drivers side AUX radiator to my XJR using your excellent guide.
I have stolen all your pictures and part numbers for future use.

Looks like I only need 2 hoses and the drivers side radiator and duct work. So not that much to do if I can source the parts.
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Thank you! Yes, you are correct that SC4, or what's called the "bypass" hose, is what connects both the engine/main rad and the supercharger intercooler.

 

Was C2D30820 the hose you were looking for but couldn't find? It has the same numbers as the hose from your picture (EX53-8B505-AA). You had question marks for the part number on your incredible Excel spreadsheet and wrote, "Longer Hose for Magna Pump, XFR-S. Unable to Find Jaguar Part #. F-Type Part#" in the description. Based on what I'm seeing, it looks like C2D30820 fits the bill.

 

That looks to be correct! Good find and thank you, I will update the spreadsheet

 

Couldn;t see the SS... also. woudl it seem to be a lot to add the aux radiators in an XFR?

 

wow. Thank you for your detailed description and time you put into this. Although I have a 2013 xjl
5.0 na I'm sure a lot of these parts would be the same.

 

Yes a great thread and those wonderfully labeled pictures are perfect!

Just want to add we now have the two failure prone plastic cooling parts in the aftermarket made from Aluminum!
Yes finally lifetime cooling parts. What should have been done by Jaguar. Which they actually did when the 5.0L SC was released but then 2 years later they replaced all the lifetime Aluminum parts with the plastic junk we have been fighting ever since!
Al. Cooling Pipes

Only things to note is it's JUST for the SC engines so far. Both the 3.0 and 5.0 engines. The price is higher too at about $250 for both parts.
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Yes! This is great to see. Anyone install these yet to confirm fitment/quality?

My Sportbrake is approaching its 5year birthday, so I cant help but wonder when the first plastic part will go on her.

 

Yes we have at least one member who got them but not yet installed.
Al. Cooling Pipes
Should be good I hope.
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This could either be the AC condenser or a pre-cursor to a plastic coolant component failure (water pump, thermostat, or any number of plastic coolant pipes). My AC stopped sending cool air a couple of times and it eventually led to a water pump failure and coolant being dumped.

 

This is AMAZING!!! Thank you so much for sharing all of these pictures and taking the time to make this incredibly helpful post! My mechanics will constantly ask me for coolant parts that I finally printed out pictures of every part we replace in the cooling system and have them point to what they need now I will definitely be printing off your pictures as they are incredibly helpful!!! THANK YOU!!!

 

The infamous Y-Pipe and Cross Over Pipe used in Jaguar/Land Rover AJ133 Engines!

I've had to perform this repair on my 2011 XF twice. The first time it was performed by an independent repair shop at around 75K. The same familiar symptoms came back at around 165K. I went back to the independent repair shop to get a quote..and then I decided to tackle this myself.

This thread was invaluable, because the how-to videos and snippets are very useful, but the parts list is crazy for this job.

I created a 2-Part video that will hopefully prove useful to those looking to tackle this repair independently, OR simply to help inform for any individuals in the market for a used Jaguar/Land Rover product that is susceptible to this coolant issue. From my understanding, these coolant component failures are applicable to a variety of Jaguar and Land Rover Models with the AJ133 engine specifically:

Jaguar Models with the AJ133 Engine

• XF/XFR/XFR-S (2010–2015, various power outputs)
• XJ/XJR (2010–2019, various power outputs, including XJR575)
• XK/XKR/XKR-S (2009–2015, various power outputs)
• F-Type (V8 S, R, SVR, P450, P575, Project 7 models from 2013–2024)
• XE SV Project 8 (2018–2019)
• F-Pace SVR (2018–2024)

Land Rover Models with the AJ133 Engine

• Discovery 4 / LR4 (2009–2015, naturally aspirated)
• Range Rover Sport (2010–2022, naturally aspirated, supercharged, and SVR models)
• Range Rover (2010–2021, naturally aspirated and supercharged models)
• Range Rover Velar SVAutobiography (2019–2020)
• Defender V8 (2018–2024, including Works V8 and P525/P425 models)

It's great to see aftermarket aluminum replacements have become increasingly available. I actually took advantage of this option and made a purchase from a manufacturer that created aluminum cross over pipes for the X250 - since that is one part I do NOT want to have to wrestle with anytime soon.

Below are links to the videos:

PART 1:

PART 2:

 

Just a note to those considering using the aluminum coolant crossover pipe. There have been multiple reports of blockages in some of the pipes ( between different companies as well as different units from the SAME companies)

I tried one and just in case poured water in one end and it came out slowly on the other end.

Newer pipes are now one piece so the joined seams the older ones has have changed. This is where they were prone to failure and blowout at the seam have sesmingly (see what I did there ) been fixed. I wonder if anyone who has used the newer pipe has had a failure.

to the last poster. Mine went at 110k. Your second lasting 100k is pretty good and the fact the car is still going at 170k is crazy.good.and the fact that you’re worried it will go again between 170k and 270k is incredible

 

Appreciate the note about blockages on some of the aftermarket metal pipes. Great suggestion to actually test the flow before installation!

If i really had to rip that stuff off the top of my engine again to get to that twice-replaced crossover pipe, I would NOT be happy.