I’m losing coolant but it’s not coming from the water pump or the reservoir
#1
I’m losing coolant but it’s not coming from the water pump or the reservoir
Hi everyone,
not having a good day , I’m loosing coolant but it’s not coming from the water pump or the reservoir . I must say I have replaced the water pump 2 weeks ago.
My vehicle is a 2004 Jaguar XJ8 and has 226,300 miles on it.
Please see video attached
not having a good day , I’m loosing coolant but it’s not coming from the water pump or the reservoir . I must say I have replaced the water pump 2 weeks ago.
My vehicle is a 2004 Jaguar XJ8 and has 226,300 miles on it.
Please see video attached
Last edited by rf69; 03-21-2019 at 10:33 AM. Reason: video upload
#4
I currently have a coolant leak on my thermostat housing at the base of one of the pipes that feed the EGR/Throttle body. Check the whole housing which is made entirely of plastic as it tends to break or crack
I'm not sure if your car is a supercharged version. If you do then I believe there is a hose in the valley of the V of the engine that is prone to leaking. If that is leaking slowly then you may not see any visible signs of coolant leak. If it's leaking badly then you may see coolant leaking down the back of the engine.
My leak is as shown in the image below:
Thermostat housing coolant leak.
I'm not sure if your car is a supercharged version. If you do then I believe there is a hose in the valley of the V of the engine that is prone to leaking. If that is leaking slowly then you may not see any visible signs of coolant leak. If it's leaking badly then you may see coolant leaking down the back of the engine.
My leak is as shown in the image below:
Thermostat housing coolant leak.
#6
The leak I am talking about comes down from a side of the engine and after the oil pan gasket and in between the transmission fluid pan , I tried to post a video but it did not load
#7
the leak is coming down from side of the engine and in between the oil pan gasket and transmission fluid pan
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#14
Took look under the jag to see if I could trace the leak and all I saw was a trace coming down from the driver side of the engine by to the catalytic converter, I took a look also taking apart the throttle body and did not see much. it appears to be the base of the thermostat assembly but it is hard to say, there is a hose that connects to the throttle body that goes further in the top of the engine, did not see much further. I added more coolant fluid and no leaks as long as I do not turn the engine on.
At this point I would have to take it to the mechanic tomorrow.
You can see how it is dripping after I started the car
At this point I would have to take it to the mechanic tomorrow.
You can see how it is dripping after I started the car
Last edited by rf69; 03-24-2019 at 08:49 PM.
#16
Had a mystery leak, it was the coolant tank overflow hose the bends under the air inlet on the engine, it was dripping onto the engine and burning off before it ever hit the ground. The hose was like $30.00 and ten minutes to repaint. Worth pulling the plastic cover off it and searching for wet spots with a flashlight.
#17
That could be a 'Valley Hose' leak? Our N/A cars also have a cooling hose that goes in under the Inlet Manifold, does a 180 under there and comes back out and up to the Throttle Body. When it leaks, the coolant runs down the 'valley' to the back of the engine and drops out behind one of the front wheels (mine was the drivers side LHD vehicle).
See Michael Hamilton's post: https://www.jaguarforums.com/forum/x...on-s-c-149873/
Perhaps you should remove your underbody tray so that you can more easily isolate exactly where your leak is coming from?
See Michael Hamilton's post: https://www.jaguarforums.com/forum/x...on-s-c-149873/
Perhaps you should remove your underbody tray so that you can more easily isolate exactly where your leak is coming from?
Last edited by EsRay; 03-25-2019 at 06:30 AM.
The following users liked this post:
rf69 (03-25-2019)
The following users liked this post:
rf69 (03-25-2019)
#19
#20
Mine only leaks from the thermostat housing when the engine is running and when under pressure. When the car is cold or left to sit then there is no leak. And when it does leak it runs down the side and front of the engine.
Yours is quite a major leak if the fluid is coming out that much.
Yours is quite a major leak if the fluid is coming out that much.