Didn’t realize when I left the house today that I had some coolant underneath the car. I’m driving on the highway when I get the low coolant warning. I was able to pull over in a Safe-ish area and pop the hood. Reservoir is empty and I can smell some coolant. Luckily I had some water with me and I was able to slowly make my way somewhere safer. I can see where it’s coming from but I don’t know why it’s leaking from that area. I took a video.

 

Probably coming from the water pump and trickling down behind the belt tensioner. Hard to tell from the video. Maybe try and do a system pressure test? If you pressurize the system it should pour out.

 

Maybe these videos will help. I don’t have much experience but the water pump area looked dry.. but at this point I have leaks from multiple areas. I went for another drive and came back and removed the intake tube for a better look. It looks like it’s coming from another pulley. I’m trying to track it when it drips and I haven’t figured out wha would cause the leak from down there or anywhere. If you guys still think it’s the water pump then I’ll order one. When the car starts cooling down then that’s when it leaks the most. Two videos for a better look.

 

One other detail I noticed. There’s an incline where I park. When the front of the car is lower, it leaks. When I park the opposite direction with the front end being higher, it doesn’t leak.

 

If it's a 5.0 there is nowhere for coolant to come out below the water pump. It could be pipes above the pump though.

 

+1 I'd suspect the pipes before the pump.

 

Thanks guys.. which pipes are you guys thinking? Are there pipes under the supercharger?

 

There's a "Y" pipe that comes up from the block, a smallish diameter rubber hose that runs from the rear coolant manifold, under the supercharger and connects to the throttle body IIRC and a short pipe with O rings that connects the oil cooler coolant outlet to the water pump. To check if there's a leak under the supercharger, peer down the gap either side of the throttle body and you can see down into the "V" of the block. If it's wet with coolant down there then it's likely one of those. My money is on the "Y: pipe since it's one of the 2 piece welded parts that are known to fail. For the "Y" pipe and small rubber hose it's a supercharger off job but don't be discouraged as it's not too bad of a job. You can change the oil cooler to water pump pipe by just removing the water pump. I did a write up a couple of years ago showing the parts that need changing so take a look under my posts.

 

My money is still on the water pump bearing but please let us know what you find. The Y pipe on my engine is aluminum. When I fit a new hose under the supercharger I don't fit the clips in the hope that I can change it in the future without the need to remove the supercharger.

 

I will make sure I update you all on this. Ill probably start working on it sometime next week.

 

Good Luck, Oxidizer. Unfortunately, coolant leaks are inevitable in these engines. 2013 XF, 2018 XJL, 2018 F Pace S - all with the 3.0 Supercharged engines have suffered various coolant leaks. I live in Canada and the coolant pipes go through various heat cycles contributing to their brittleness. The 2013 XF was the most troublesome as it was the oldest out of the 3.

I read a post a few years ago stating that the coolant pipes start leaking around 4 to 5 year mark (depends on the region and use). It is recommended to change all the coolant plumbing at the same time, as one coolant leak is an indication of other pipes going out soon - as was my experience with the XF. This may seem unnecessary, though it will be more cost efficient when all the plumbing is changed while the engine bay is disassembled.

Hope you're able to pin point the leak and take care of it.

 

Thanks for all the j put everyone. Ended up buying an endoscope and used it to look around different areas. The area under the supercharger is dry. We narrowed it down to one of the gaskets of the water pump. I’ll keep you guys updated what ends up happening. I’m busy for the next week but I’ll tackle it when I can.

 

Swapped out my old water pump for a new one and I still have a leak. I can’t figure out if I fixed a leak at the water pump and created a new one or if this was it all along. Maybe when I was doing the work on the water pump I shifted a hose and now it’s squirting at a different angle. Maybe just happened to be the next weak point of the system. Either way, at least I don’t have to worry about the water pump for a while.

Now I’m trying to figure How what hoses are under the thermostats. Is there a lower radiator hose that goes up the the thermostat? Or are there multiple? I can’t seem to find a diagram that I can understand to help me figure out what hose(s) I may need to replace.


seems to be somewhere right under the thermostat.

 

Don't know if this will help.

 

Thank you, it’s a start!

 

https://www.jaguarforums.com/forum/x...change-189069/

and more importantly

https://www.jaguarforums.com/forum/x...change-214963/

 

Went to oriely auto parts to grab a pressure tester. They handed me a basic kit and I said I don’t think that’ll work. The guy behind the counter said “no it’ll fit, it’s universal”. I look at it and I’m thinking no way. But I have no choice because they are the only ones with a multi piece pressure tester within 20 miles.


go home and surprise! Doesn’t fit. Like I thought. Well at this point I’m annoyed and just decide to start the car and let it heat up and build pressure. Once it got hot enough it started squirting coolant. I quickly take off everything out of my way and put my hand down until I can feel the water squirting me. It’s hot but worth it. It was kind of hard to feel it without being able to see much.

You will not believe it. I found the source of the leak! It is the craziest thing and now it makes sense. I don’t think I ever had a leak at the water pump. I’m glad I did it because it looked like it was replaced before but without any markings I’m assuming it was maybe a cheap unit. The oil cooler to water pump tube was also installed incorrectly.

I don’t know how this happened... but....





the hose from the radiator to whatever cooler it is down there was sliced by the belt. I don’t know why. Maybe the previous owner had some work done and it was installed incorrectly? Or maybe warping from all the heat? Either way, I’m relieved. Shouldn’t be that hard to replace right?

 

Yep, bad installation most likely. Well found. Lots going on down there, have to keep everything away from the belts. Jag fitted lots of clips, for good reason, workshops probably don't bother putting them all back on.

 

Update: finally got everything put back together after not driving the car for a while now. It was a pain in the butt. Someone definitely did work on it. Not only was there a clamp there but someone zip tied on top of the clamp. Trying to take of the clamp was filled with a lot of frustration and curse words. But after purchasing some tools that helped me reach that location I was able to get it off.

my intake tube was no longer usable since it was basically cracked at the throttle body. so after some trimming I used a coupler as a temp fix

 

My XFR had the same leak on the trans cooler pipe. It was only $28 hose from the dealer but thankfully my brother worked for Jaguar as a tech at the time and fixed it for me. I had him zip tie the new one away from that belt. Apparently they lose their shape over time and shift into the belt.