Well yes but who has access to a pressure tester?
It's rwd so as long as the vehicle is secured and supported with Axel stands. Or just take it to a garage and let them get it onto a ramp

 

Coolant pressure testers are available to rent FREE from nearly every major parts stores. You have to put a deposit on it, but fully refundable.

 

I might be looking at this from a different angle but the Jag is leaking coolant, never a good thing on a AJV8, find the leak and fix it. Job done.
Before you go near a garage it's in your best interests to at least try your best to see what is going on - many garages now are not trustworthy, especially on old vehicles they just don't care.

Maybe you need to pressure test, you definitely need to find the leak

 

After owning my XK for a number of years, I realized it was pretty much a necessity to have a pressure tester handy. Mine is a MotoRad MT300. The biggest issue is find an adapter that will fit our reservoir tank. I had to purchase that separately, rather than buy a kit that had numerous fittings for the cap. I believe the 06-09 might have a different reservoir than the 10-15 XKs.PS...When testing, don't over pressurize! I believe up to 15 lbs of pressure should do it.

 

Do you have a link for the adapter for the 2014? I’ll ask an auto parts store to lend me a tester. I haven’t found any trustworthy garage to work on this car.

 

It was quite awhile ago, but if I come across the place I got it, I'll forward it to you.

 

Here is a listing for a cooling system pressure tester on eBay in the US that contains several adapters to fit different expansions tanks:

https://www.ebay.com/itm/25616027923...BlBMUKLE_MHrZQ

 

I dropped it off at an independent shop today that got high ratings. I left it there for the head Mechanic to see on Monday. They put it on the lift and saw coolant leaking all the way down the entire undercarriage. They think it could be the water pump. They showed me a YouTube video how that’s removed and how many of the hoses and fittings break when you’re trying to get to it and that it takes more than a day to do. They had replaced one on the same motor in a Range Rover. Has anyone here changed these themselves? I was wondering if it was really that complicated and takes all day to do. Considering the part costs only $179.

 

. Don’t fool yourself. Most probably with your mileage most plastic parts are already brittle. Yes there are hoses that must come off and once removing the pump replace as much as possible. In the order of coolant failure parts in our cars. 1) Water pump 2) Front crossover. 3) Thermostat housing 4) rear crossover. There are parts connected to these that must be taken apart. It’s foolish to put them back. PS… There were approximately 8 superseded water pumps for the XK… The last one was 2015 made in Italy ( OEM) Anything prior can be prone to fail. I’ve replaced mine with the 8th edition and so far so good. Good luck and let us know how you do.

 

I bought the pump from a dealer. it should be the most recent version as it states it supersedes 9 previous versions. see photo. I’ll replace all the parts you suggested. I’d like to convert to the aluminum piping too but I don’t see that as a Jaguar part. I expect 10 hours labor at $175 so $1750 to have all this replaced. Does that sound reasonable for this job? I also found the washer fluid tank is cracked and leaking and someone removed the backing plates for the front brakes. They’re missing.

 

I had just about every plastic coolant piece replaced by Jaguar for about $225 an hour at that time. Total with about 7 plastic parts ( excluding water pump which was done previously) came to around $3,000 including parts labor and tax. If they are charging you 10 hours, get a schematic of all the coolant parts and get them installed as well. These parts have to come off anyway to replace your 4 parts and there should be no extra labor. Good luck.

 

Yes the current pump from Jaguar after all the revisions ends in 3909. You got the right one.

Do listen to what bocatrip has posted. I would plan to replace all the plastic parts with the much better metal versions. Do it once and do it right. The problem with just changing the WP is your don't want to have to repeat all that labor to keep replacing stuff as it fails one by one. Do some searches as cooling system problems will be the number one problem with your car. So be ready and head all that off.

All these parts have been released in metal as replacements to the OEM plastic versions.
Rear water manifold
Thermostat and housing
Both front "Y" pipes
Transfer tube between WP and oil cooler brick
Brass heater bleed screw
Brass nipple into the WP

We have dozens of threads with pictures. Also remember Jaguar is a small company so any and all threads on the 5.0L cooling problems can be a help. F-Type, XK,XF and XJ are all vary similar in this area. The V-6 and V-8 are identical as Jaguar made them the same size. This massively simplified the amount of different parts that is usually needed between the two.

Again as posted above this will be expensive and is another great example of how much you can save with DIY repairs.
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The leak has been repaired. The top mechanic at the independent shop looked at it and saw it was not leaking from the coolant pump. The pump was good. It was leaking from the crossover manifold at the back of the engine. It was a 4 hour job and cost 1100 with the part and tax. He test drove it, put it back on the lift and confirmed no more leaking. The job comes with a 6 month warranty on the parts and labor. No other parts were replaced during the job since it wasn’t in the same area as the pump. I’m picking the car up today.

 

Not to start a debate, but R&R of the rear manifold crossover usually requires a complete tear down of the top half of the engine as it's wedged near the firewall and below the supercharger, engine harnesses, coolant hoses, pipes and everything else therefore impossible to see or reach anything. I know, I've tried. Curious as to how your tech managed to replace it without removing anything that covers it? If done the normal way, there's gaskets and other bits which require replacing and of course with everything out of the way, it's easy to replace the plastic pipes and since the throttle body hose's connected to the rear pipe, a good time to replace since they're notorious for leaking.

 

jahummer makes a great point on the difficulty of that repair.
I will say I have done all that WITH the SC on and it was not fun. It's a shame you did not install the rear water manifold Aluminum part and also removed the Symposer junk since it's all right there anyway. Another fairly cheap repair is the PCV diaphragms which are also in the rear of the engine.

So good that it's fixed but now you still have all those other plastic parts just waiting to fail.
So make it a habit of popping the hood and doing some visual check REGULARLY!
Usually you will get a leak before anything lets go but unless your vigilant about checking it things can go wrong quickly.
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This was my first time to this shop but I trusted them more than the Jag dealer who usually mess things up. The part was called the rear coolant bypass passage manifold. This Mechanic was a little stubborn in his approach so I would never be able to get him to change other parts. He said all the other parts were good so there was no need to replace them. He has over 40 years experience and diagnosed it right away and knew what to do. I guess he didn’t break anything while doing the job because there were no other parts on the service receipt. I guess he doesn’t believe in changing things preemptively. Is the aluminum manifold a Jaguar part? Do you have the info for it I could take a look at?

 

The rear crossover is probably the more difficult of all the coolant pipes to replace. The intake manifold must come off (8 intake manifold gaskets) and everything is exposed if not already taken apart. I have to agree with the above comments about this was the best time to change everything exposed regardless. Glad you had it repaired, but as mentioned, keep a constant eye on your coolant level and you should be good.