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Defender110 leaking coolant

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Old Dec 12, 2024 | 04:20 PM
  #1  
DarkRovers's Avatar
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Default Defender110 leaking coolant

My 110 is leaking coolant and I cant seem to find the source. Its on the passenger side. I checked the aux radiators behind the bumper. I didn't see anything.
I added dye to help find the leak. I can't see anything from the top. I am going to remove the under shield and see If I can locate the problem.
Ill post my findings.
This is the second time It leaks in a month. Its odd because I check it daily. Nothing and then a quick 5 min trip to the store and this is what I find. (see pic)
If anyone has had this issue please share, I might have the same thing going on. Thanks.

 
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Old Dec 12, 2024 | 08:38 PM
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AVLDefender's Avatar
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Possibly the auxiliary radiator. It is a known leak source.
 
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Old Dec 13, 2024 | 06:32 AM
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Mine was fixed for that exact problem under the warranty. First they replaced the reservoir, and when that didn’t work they replaced the aux radiator near the wheels. Problem solved. Took some pushing back, so if you hear “you know these vehicles do use up the antifreeze” keep pushing.
 
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Old Dec 13, 2024 | 07:57 AM
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Also, have the dealer check the water pump. There have been several issues with the water pump, and the leak from the pump is tiny and difficult to see. After several visits to the dealer where they could not locate the leak, they found it at the water pump.
 
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Old Dec 13, 2024 | 07:39 PM
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Found the cause of the leak. Its the O-rings from the turbo coolant lines. LR part # 104123612
Being Friday afternoon I wont get the O-rings until Tuesday. I paid a total of $34.82 for two seals. From my local dealer.
I think the reason it spilled the way that it did is because the under shield and the slight slope in my driveway.
Others on this forum have had the same issue, pointed me in the right direction. Thanks.
Next I will check the water pump as you recommended. Just to put this coolant issue to rest.
 
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Old Dec 14, 2024 | 03:40 AM
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Gald to hear you found it.
 
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Old Dec 26, 2024 | 04:42 PM
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Changed out the O-rings to the Turbo Coolant lines. P400

Remove Under Shield 15mm and 10mm bolts
Drain coolant. Drain plug on RT side under radiator use flat head screw drive
Remove 10mm bolt that holds both coolant lines. Its a bit hard to see but you can do this by feeling for it.
Remove old O-rings and replace with new ones. Clean any residue from pipes. (my old ones are yellow, new land rover ones are red)
There is a small electrical connector that needs to be disconnected to give you some room to work.
Also the bottom pipe will install easier if you disconnect it at the clamp.
It is easier to install the pipes, if you start the 10mm bolt first
Give it a few turns the maneuver the coolant pipes into place and snug down. 11nm or 8.1 ft lbs
To fill the car back with coolant you need a venturi pressure tool.
Once you fill it back with the tool you turn on ignition (dont start engine)
step on the gas pedal all theway down and hold for 10 seconds with the driver door open.
This will turn on the electric water pump for 5 min and start to cycle the coolant system. Make sure to have heat on high and blow speed on max.
Once it shuts off. Start the car.
Hold the RPM between 2500 and 3500 RPM until the Heat starts to come out from the vents
Turn the Car off clean up any coolant and install under shield.
Job took me 2.hrs. I took my time. I used original JLR coolant and distilled 50/50 with distilled water.




 
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