Hi all, Since our water pumps have been updated so frequently it's not always easy to get the latest part number for the 2010 XK 5.0 water pump. Is it C2Z31587 or as another post has it for AJ813909? Also, what are the most common plastic parts that dealers replace in addition to the pump? Thanks everyone for your help.

 

10XKR and MarkyUK....I noticed that after I posted this thread you guys had answered my question. Thank you. It seems that AJ813909 is "presently" the latest updated water pump. Hopefully it will be the last.

 

Agreed. The latest water pump is AJ813909. Here's the history, from my thread in the XJ Forum:
https://www.jaguarforums.com/forum/x...-132537/page6/

 

 

 

 

Try to see if they left any coolant on the undercover. If you are able to I would try to get a hose down the inner undercover and wash as much of any coolant overflow left there as possible. to expedite the removal of any smell caused by the excess. Good luck and let us and know how you make out.

 

 

I mentioned in the other thread also.... I had a slight coolant smell for about 1 month after water pump replacement. The dealer that did the work did rinse off the parts and the underbelly but residual coolant obviously remained, probably in the nooks of the engine valley. That's ok though as the coolant level did not change once it bled (about 2 days after I had to add about 5oz).

All that said, ~6 months later, I get an occasional faint wiff after I pull in the garage and shut down the motor. I check the coolant level weekly still.

Coolant leaks and remnants of it are the devil for those of us who stress over the little things (me)

 

Dropped my car off at a different Jaguar dealership after 4 years using the closest one to me. Asked for an oil change and told them about my coolant smell and having to add coolant (very small amounts of a few ounces). Called me and told me pressure test showed no leaks. Told me my brake fluid was very dirty and I need tires even though they have 7/32nds left. My brake fluid was changed 2 years ago. Dirty?? Ha ha. Need tires because they are 8 years old? Yes I know tires should be replaced after 6 years but there is no sign of dry wall cracking and always garaged. Looks like dealership wants to perform a Walletetectomy? My car now has 10,400 miles on it. I guess I'll have to live with the coolant smell and keep an eye on my level. I've exhausted my options as I've taken it to 2 Jaguar dealerships and one Indy who had also checked the weep hole and found no evidence of crusting or coolant. With the amount of driving I do...(500-700 miles per year), I'm sure I'll pick up on it if it progresses. I have 1 1/2 years left on my Easy Care extended warranty but don't think I'll be using it.

 

 

 

Welcome to my world! I'm still driving with my original water pump and although I can smell coolant after every drive and do notice some coolant loss, no Jaguar dealership or independent shop has been able to locate the origin of any leak. The weep hole at the water pump is dry with no crusting, and after pressurizing the system over night, it always holds the pressure. I've learned to live with it, and also am not crazy about having the dealership taking things apart, especially when they aren't able to find the cause.

 

Mine went in for it's first annual service with me two weeks ago.

When doing the safety checks they advised that mine is showing no signs of leakage so It would be best to leave alone

So do tell, how does a new purchaser of a vehicle with little service history (apart from the Jag stamps) tell whether their car has had a new one installed by an Indy, or even DIY, can a visual inspection identify? Ask as remember reading somewhere that the pump physically needs to be removed to check the part no...which seems a little farcical

 

Ter,

Coolant circulates throughout your car and can leak from many places including, but not limited to, a hose, cylinder head gasket, radiator or cap, overflow tank, and heater. The most likely culprit, the water pump, may not be the cause. It may be so small that it wasn't detected by a pressure test.

Many auto parts stores sell UV dye and light kits. You can place the UV dye in your engine coolant and drive your car for a few days to make sure the dye circulates through everything. Then, park your car in a very dark place and use the UV light to search for your leak. The dye will show up very brightly under the UV light and should provide a path to your leak point. Don't forget to look inside your car after you've turned on the heater, since that's just a small radiator located under the dash and could be leaking.

Good luck finding the leak.

Stuart

 

 

Usually any failure from the "notorious cross over pipe" is catastrophic rather than a small leak. It usually bursts do to it's horrible design rather than a minor leak. At least this is what I was told at Jaguar.

 

Even though the smell is coming from the front of the engine, it's possible that the source of the leak is elsewhere since liquid flows to the lowest point. Since the pressure test didn't find a leak, I suggest you do the UV dye test. Also check the hose between the radiator cap and the plastic coolant overflow tank, as well as the overflow tank for cracks along the seams. It's also possible that excess coolant is spilling out of that tank and running down the chassis to the front of the car.

 

Guys may I offer an alternative way to not have any coolant worries.
This is one of the cars where a leak does not matter- and we may have been brainwashed into believing it catastrophic...bear with me.

One one hand you have folks who cant find the leak despite extensive testing- on the ulcer chart I give this a 9.
Then you have guys who have preemptively replaced the water pump with the correct one, and they still smell coolant. This is a 10 on the chart.
So what we have irrefutably established is that even the attempts to cure the ulcer gives us no relief and does the opposite.

There is a way it can be managed and nothing catastrophic can happen.
Know that this engine can run a minute with no coolant and no damage. Enough time to pull over.
So it seems to me it would be easier to simply be vigilant.
Monitor the engine temp. Check the coolant level. Check the oil**
If something blows, it will do you a favor and show you exactly where the problem was.

** if you notice coolant low, once every 4months siphon out the oil and check for water, put it back in.

3 of my daily drivers loose coolant, even the ones I have changed the water pump on. Doesnt bother me. Now if I ever saw a drop on the floor, I would make sure to track down the cause and fix it, as it will kill someone's pet.

 

The Q&C way...pedal to the metal and a new air freshener hung on the rear-view mirror. All will be just fine...until it isn't just fine.