Boca I came from an old ferrari who's water pump was a know weak point. It was recommended to rebuild it every 15K miles and usually the process cost about $1000-1500 . The pump seal kit was cheap but if you needed to replace the pump they were north or $500. I wouldn't panic , just drive it and have fun if it blows get it fixed. By the way my old 3L engine costs around $20-$25 K to rebuild.

 

The crossover pipe failed on my 2011 X150 at 31,000 miles. At first I thought it was the water pump because when I removed it the pulley had a lot of play. In fact it was not leaking, astounding given the play. Crossover and water pump were both replaced. All assembled carefully, pressure tested, no leaks. After a week or two I began to notice a distinct antifreeze smell when the engine is hot.
I can see no leak, pressure tests reveal no leak, and there is no loss of coolant!
Curiouser and curiouser...
Regards,

 

I would suggest you remove the plastic under tray and use a low pressure spray to rinse the bottom of the engine and under the radiator area. If you pressure tested without any leaks you most likely have spilled AF from the repair.

 

Bottom line is this. I've gotten off other Jaguar forums with the 5.0 with many many water pump failures. There are TSBs for almost all the 5.0 engines from 2010-2015 with water pump issues. Why doesn't Jaguar just step up to the plate and replace every F.....G water pump and crossover pipe on these engines and relieve owners of all their anxiety in ownership of these sooner or later self destruct cooling systems? Salt on the wound are the XKs with no warning because of lack of temp gauges of imminent over heating. There are already TSBs for the 2010 5.0 engines for these related issues. Just step up to the plate and fix a problematic issue? Why do owners of a luxury brand need to break down or even worse destroy their engines? You will never find this on a Toyota /Lexus site. Once they hear about an issue, it's addressed and resolve comes as soon as a reasonable fix can be found. But not for Jaguar. One thing is for sure. Nothing has changed since the 60s. The Jaguar reputation is out there and most know it. I will never buy another Jaguar product while I'm still here on this earth. They would rather sweep the issues under the rug than step up to the plate and fix the issue. I'm loyal to Lexus....Never Jaguar/Rover again... I'm not trashing the brand for those who are loyal, but it's not right... We all know the water pumps are defective....they have seeped when first installed from the factory. End of subject.

 

So since September, checking the level weekly, I've watched my coolant level drop about 2 inches. I'm going to top it off today with some DexCool. I still smell a faint odor after it's been driven (not every time though...) and I can still not locate any leak. I may remove the intake plenum and the shroud underneath over the holiday break so I can get a better look around the water pump and hoses...

 

Well I found a leak. I was smelling coolant from the right side so I kept looking there. The leak is on the left side. This connection is loose and leaking. The coolant is then dripping down a tube and settling on the right side (orange arrow). I also checked the water pump pulley and it seems stable for now... Inside this connector is an o-ring. Is that all I need replaced? The connection is very loose.

 

A lot of people come to car forums only when they have a problem, which would skew data.

It seems most XK owners don't really have problems, this section doesn't read like any other model specific forum I've owned. Its a sort of XK Owner's own little Off Topic world.

Its a major reason I bought one, Jaguar must of done something right mechanically for this forum to be like this.

A water pump failure on my other cars, shares a belt with the timing system, pump seizes, timing system seizes, pistons run into valves.

 

Shemp, trying to get a handle on what we're seeing. I have no perspective. It appears this is the underside of the engine? Taken from where? Also I see a yellow and a red arrow, no orange. sorry, trying to help but just confused by what I see/ don't see.

 

Sorry. This is the top view of the left side front of the motor. Close up of what is circled below. Where the thermostat housing is, above that is a fitting that connects to a line that T's off a line coming directly from the top of the expansion tank. It has a squeeze type disconnect connector and comes off easy. There is an o ring inside that I suspect is the problem. The yellow line above is just showing where the drip is going...

 

Is it similar or the same as this?

https://www.jaguarforums.com/forum/x...-oring-171029/

to your questions, is that all I need replaced - short answer is maybe and probably.

 

No and yikes on that thread! It's a real small hose. Looking in the service manual, it looks like it is connected to the bleeder on the expansion tank. The o ring is about 1/4" diameter. I got it off and it looks flattened so im off to find a replacement. Thanks Sean!

 

yeah cheap ring and now you know where to keep a lookout.

 

Ok, got it figured out. $80 later. Went to Jag and got schooled a bit. the hose is called the overflow hose. The o-ring goes around a shaft that broke inside the housing. Turned out I needed the whole connector which of course is only sold with the whole hose assy. Part is C2P12405.

This is what broke, there should be a shaft at the bottom


Got the broken bit out and replaced the hose assy.

This is the whole overflow hose.

 

so it drops down into and overflow tank Shemp?

 

The single end of that hose connects a nipple on the top of the expansion tank. Not totally sure how the flow goes,

 

Oh and the small rigid hose on the connection that broke is slightly pressed down when the engine cover is installed. There is even an indentation in the foam on the underside of my engine cover. I'm sure this does not help.

 

I had the same issue when I replaced my crossover tube, I was told that small Y shaped hose is a bleed hose to vent any air in the system to the expansion tank. It connects both the water pump and the crossover tube to the expansion tank.
Regards,
White Bear.

 

As the OP I'd like to thank everyone for their experiences with the infamous "coolant smell" I have no clue where my smell is originating but have very slightly been losing coolant. I'll be bringing my car into service in January 2017 as I have a few coupons I can apply to any fees they mandate due to not being able to find the source of the leak. As mentioned earlier I have an Easy Care Gold extended warranty that I have yet to use in a little more than 2 1/2 years since purchasing the warranty. One exclusion is if dealership cannot locate a problem there is a diagnostic fee around $119 or so. I will be pissed if I'm charged as I am losing coolant (slightly) and it's their job to find it. The warranty was not cheap! To be continued...... I'll certainly keep this forum informed.

 

I have the top extended warranty, sold by my Jaguar dealer. Still, when I complained about coolant smell I was charged when they could not find a leak.

 

Although not encouraging, I am losing coolant and it must be going somewhere! If nothing else I would be starting a paper trail. I'll have to see what happens when I bring my car in. I'll certainly be talking with the service manager as well.