I opened the cap today and this is how it looks inside my tank.




The fluid is filled to the max line but the black circle is at the bottom. Is the black circle the float that you guys are talking about?

 

no, that it the retainer that keeps the float(white piece under it) down

 

Just so that I understand you better, when you said the white part is the float. Looking at the picture, is the float size is the blue circle or the green circle part?

 

It is the blue circle.

 

Although I hate too, I have to agree with Lotus on this one, Spend the $$$ and just replace the tank, as he say's the plastics are consumable on these cars.And as Brutal has said rigging something like this is just crazy on an XF. $100 is still WAAAY cheaper than an engine, it only takes about an hour to do.

 

Is this as simple as siphoning the coolant out into a bucket, then unplug a few hoses, unscrew the tank, put in new tank, plug hoses back in, refill the tank with the original coolant? Once I install the new tank, how will the red sensor clear from my dash?

 

I changed out my coolant reservoir a few months ago. All was well until the same coolant level low warning sign appeared on my dash again???

please help.

 

Did the replacement have a new external coolant sensor?

 

The sensor is built into the reservoir if I am correct. There are no external sensors. I checked and did see that my coolant was really low. I did not see any leaks anywhere so where did all the coolant go??

 

There is an external sensor, some tanks are supplied with it installed

https://www.sngbarratt.com/us/#!/Eng...6-49c970e5e030

If this was the first check then the level may have adjusted itself

Maybe fill to level and watch daily

If you added fluid did the low level light go off?

 

I believe my tank has a built in sensor but I could be wrong. All there was is a 2 hoses and a plug I had to re-insert. Also, I added fluid and the light went off. But where did the old fluid go in the first place?

 

The tank has an inbuilt sensor and an external sensor, possibly the plug you mention

If you changed the tank, topped the fluid up, drove it then the first time you checked it the fluid was low, this can happen.

If you then top the fluid up and it still keeps dropping then obviously try to see where it is going, otherwise it should hold the level now

I would check the tank daily until you can see if it is holding the level of fluid rather than waiting for a sensor to show anything

 

Hi Santer,,

Yes I replaced my original with a new oem tank. I did top it off and am monitoring it daily now. You said that the fluid can be low the first time after a fluid top off. Why is that?

 

Probably some air in the system

 

Okay so it's been about 8 days since I filled it to the midway mark between max and min and now it is slight below the bottom of the word "Coolant Range". I think there is a leak somewhere. What do you all think?

 

The coolant systems don't use up coolant. If you have less coolant than before, you have a leak.

 

Any idea where the leak can come from? Is there a usual area or culprit I can check?

 

Anyone???

 

Remove the underside "belly pan", and see if there's any liquid contained in it. If so, then start looking for any sign of liquid dripping from one of the coolant hoses, radiator, etc. If there's no evidence of liquid, then you have an inordinate amount of air in the cooling system. When you replaced the reservoir, did you run the engine, with the heater on at max temperature setting, and the radiator cap off, for at least 10-15 minutes?

 

Get a coolant system pressure tester.

https://www.youtube.com/results?sear...cooling+system