Hello,
Just bought my first Jag. It’s a 2012 XJL Supercharged.
It has 58,000 miles on it and I don’t have as much info about the maintenance as I would like.
It’s at my mechanics now just getting oil changed and getting it looked over.
At 58,000 miles should I just have him replace the water pump as preventative maintenance or am I being over cautious?
Amazing driving machine and thanks for any responses.

 

HIstorical, welcome to The Forums. I think you are going to find this to be the place that you are looking for. We pride ourselves on being a better car group. But, as part of this, we like to get to know one another. So, please stop by the New Member section and tell us a little bit about yourself and what brought you to your jaguar. This will also give you a chance to meet those that make this place what it is.

As for your question, I would say to first come over to the X351 section (for all XJs 2009-2019). Here you will get all the info you need about your car and lots of helpful information. As for the water pump, I would not worry so much about the water pump, but more with the plastics that are around it. The plastic seems to be what is failing more times than not. There has been a lot of discussion on this very topic in the X351 section and you will find that the water pump complex has been redesigned a number of times. With this being said, is replacing the water pump a good bit of insurance, it sure is. Especially when you figure that a new engine for your car can run up to $45k (ask some of the members about the quotes they got from their dealership after they drove their car hot).

The big things that you want to pay attention to is the small tubing in the near right side of the engine bay (as you are standing in front of the car, looking into the engine bay). This tubing gets brittle with heat cycles and will suddenly crack (especially when working in the area). and there is a plastic transfer tube on the back of the water pump that feeds the engine that will suddenly split, resulting in major water loss. This transfer tube, someone has actually come out and made a metal version of it (info in the X351 section). So, if you do the water pump, spend the little bit extra and get that. Unfortuatnely, for what you are looking to do, you can probably plan on spending about $1500 on the water pump. BUt, like I said, it is good insurance from a major inconvenience.

 

Welcome to the forums Historical,

I've moved your question from General Tech Help to X351 forum. This is the place to post technical questions about your model.

Please follow this link New Member Area - Intro a MUST - Jaguar Forums - Jaguar Enthusiasts Forum to the New Member Area - Intro a MUST forum and post some information about yourself and your vehicle for all members to see. In return you'll get a proper welcome and some useful advice about posting to the forum.

Graham

 

Thermo, Thanks again, I will pass this info on to my mechanic. This was so very helpful.

 

Hello Thermo,
Thanks for the information from my side too.
Would it be possible to place some pictures or something to point out exactly which parts should be replaced?
My machine has driven 64.000 km now, and from the beginning when I bought it, with 50,000 km, once in a while I have to put a little bit of coolant.
Nothing exaggerated yet, it doesn't smell and I don't see any leak or liquid, but...
Thanks!

 

Harrosito, the list is pretty short and I can't seem to find a good picture to show you what I am referencing. But, if you get near the water pump, you will be able to pick out these parts with ease. The parts of concern are:

1) the small (6mm?) plastic line running from the overflow bottle to the piping near the water pump. This is out in the open, not supported, and easily bumped/broken. This is a TRUST ME!!!!!!!!!
2) On the back side of the water pump, there is a roughly 3 inch/80mm piece that connects the water pump to the oil cooler. There is a metal version of this out there, get it if you can.
3) the elbow going into the water pump at the 4 o'clock position (when standing in front of the car). This piece has been redesigned a number of times to change how the seal removes any water pressure pushing against the bearing, leading to an early failure of the bearing.
4) the small tube coming off the front of the water pump, up to near the intake, running over to the right side. It has a funny Y shaped plastic piece in it that serves no purpose (did back on the original design, but not any more).

 

Hello there! I write service and manage my family owned Jaguar repair shop and in our experience, the 3 and 5L engines usually begin to leak coolant at the heater manifold and coolant outlet pipes around 75k-100k miles. Since your Jag is 10 years old, even with low mileage, the coolant pipes and cooling system parts are also 10 years old and will become brittle/crack. When that happens, we replace the heater manifold gaskets and all plastic/rubber, hoses/pipes that leak, we save it in our labor operations as a kit. We always recommend changing the water pump when doing this job because once the manifold is removed it saves our customers money in the long run with the overlap of labor. If you do decide to do the water pump, I wouldn't be surprised if the manifold and outlet pipes begin to leak a few months to a year after it's replaced.
If it were my car, I'd do the water pump, heater manifold gaskets and all of the coolant pipes/hoses.
Here is a good exmple from a 4L Jaguar of the comparision of a coolant outlet pipe new and one from a car with 96k miles on it. The plastic turns brown brittle and begins to crack. I don't know or understand why Jaguar is still using plastic for these pipes?? Hope this helps!

 

My 2011XJL 5.0NA still has the original cooling system parts. Only about 22K on the car now. So this work is in my long term plans. No existing issues...yet.

Recently I went to my local dealer to get a parts list of cooling system stuff I should replace. I attached a PDF of the list along with exploded views to reference.

Parts listed are below. Wondering if this list is complete enough? Anything missing I should include?

1. AJ813565 HOSE
2. C2Z28467 TUBE
3. IAJ89664 PIPE-OUTLl
4. AJ813909 PUMP-WATEI
5. C2Zl8658 TUBE
6. AJ811539 SEAL
7. lc2D6005 HOSE-ENGH
8. AJ814007 PIPE-HEATE

 

Thank you,
I’m getting quite an education on Jags water pump issues. It is baffling with the known problems of plastic cracking why they continue it.

 

Ok Thermo, thanks again! I'm gonna take a look under the hood with this writing in hand, and see what I will meet there.
And thanks to the other responders too of course!!
I recognize the colors and the state of the tubes in Sabrina's pictures, but that concerned the connections of the then 22 year old radiator of my 1996 Daimler Century, when I replaced it for a new alloy one.

 

Maybe add to your parts list the PCV diaphragms? They do tend to break and cause a vacuum leak and are not very expensive parts.
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Hey Rothwell!
Your dealer has included the right parts for the water pump! In our experience, replacing the intake manifold gaskets because of the age of the vehicle would be a good idea. Part number AJ811713 which happens to be the same as the Land Rover gaskets part number LR010881-it takes 8 to do this job.

Also I have done a lot of research and have a great relationship with my local Jaguar dealership parts department and can provide you with the land rover part numbers for some of the other parts needed for this job. Hope this helps!

1. AJ813565 -LR092992
   
2. C2Z28467 -LR049989
   
3. AJ89664 -LR018275
   
4. AJ813909 -LR097165
   
5. C2Zl8658 -LR028136
   
6. AJ811539 - LR030593
   
7. AJ814007- LR109402 this part number can also be found as C2Z31645 it was the original part number
   

 

Thanks Sabrina this is very helpful to all of us. The LR options give us something to work with and maybe can save a few bucks. Always welcome with these cars.

Glad to know my dealer got it right.

About the manifold seals, does that manifold need to be removed anyway when replacing the cooling system parts? Asking because replacing water pump on my 4.2L did not. If it does then replacing those seals is a no brainer I agree. If not then since I will likely DIY I would leave that for future work.

And do you always use OEM parts? I can see that those seals are about half OEM price if you go with EuroSpares, My experience with Euro parts has not always been good though so I am cautious

Your willingness to share your knowledge is very much appreciated..

 

Hey Rothwell!
I am always happy to share what I've learned! I have even provided my parts distributors, SSF & IMC the equivalent numbers and it has increased their Jaguar parts sales significantly!
The manifold does not need to be removed to replace the water pump but the water pump is removed when replacing the manifold gaskets. When doing the cooling system hoses/pipes, plastic parts we recommend replacing the water pump to save our customer money in labor in the long run since the water pump is already removed.
If you are planning on just doing the water pump the labor is significantly less but in our experience, once the water pump is replaced, the other plastic parts and hoses that are the same age will begin to leak sooner rather than later. ( I always like to think of it like, since that the water pump is able to handle the full pressure again once it's replaced and the older hoses/coolant pipes weren't replaced they're now "competing" to hold the same pressure as if they were brand new) Not the best technical description but having seen 100's of these 3 and 5L come through our doors with the same, either water pump leaking or manifold and coolant outlet pipes leaking...it just makes it easier on our customers to spend one chunk of money... then to come back a few months later with the low coolant light on again of course thinking we didn't fix the cooling system problem.
As for the gaskets, we tried Eurospare in the past and we had to warranty enough jobs to not purchase Eurospare or URO gaskets anymore. We have had success with Rein and Mahle gaskets. Hope this helps!!

 

Not really, but it does suck. The volumes on these cars never dictated high quality components across the board. Simply too costly even with some part communization.
Maybe if they only sold one model. There are probably even better resins out there now, but the OEM just cares about getting you over warranty and some change.

 

That is true but plastic cooling system parts that deteriorate are common across just about all cars.
I don't know why all manufacturer's don't replace all the rubber hoses with silicon versions?
Yes they are more expensive but looking at any car forum you would think it would save them a lot in warranty costs too?
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It's one of those things that meets the market. That's the reason the domestic automakers do it. My NDA is expired anyway, but I asked the question several times as a powertrain cooling engr.

 

Sabrinaservicewriter
where are you located in Georgia

 

We are in Tucker Georgia! kuhnauto.com

 

Thanks, very helpful