Coolant leak only when charging?

[Heliian]

coolant lines

Coolant runs through the inverters and chargers also. It could leak from many points, even from under the bed area.

If you do overpressurize the system it should come out the vent. If a line breaks or a seal pushes out it would leak continually.

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[Iroc34a]

I found this info on another post which may reiterate what others have already stated.
"The coolant puddle’s position, under your feet, likely points to the battery pack’s coolant lines or reservoir. The Lightning’s 98 kWh (SR) or 131 kWh (ER) battery spans the truck’s underbelly, with coolant routed from a reservoir in the frunk through lines and pumps to keep it at 77-95°F during charging. Charging, especially DC fast charging, builds heat and pressure, which could pop a loose clamp, crack a brittle hose, or stress a seal, spilling coolant only after the cycle ends and pressure settles."

This seems most likely. Charge cycle complete. Added 52kWh. No leak ? Coolant tank at line. Strange. But we know it won't get better. Ill keep an eye on it as usual.

 

[Iroc34a]

It's possible what you saw on the floor is washer fluid that drained down and your coolant was always low. Keep an eye out though.

I would say after 40 plus years as a mechanic, if I confused blinker fluid with coolant, I would fire myself! LMAO. I am very consistent on checking the coolant level.

 

[Henry Ford]

I would say after 40 plus years as a mechanic, if I confused blinker fluid with coolant, I would fire myself! LMAO. I am very consistent on checking the coolant level.

I believe @Heliian and assume you work at my local Ford dealership.

 

[Iroc34a]

So, a little update. finally got into the dealer to have them check the truck out. A couple of days ago I crawled up under the truck and could see some coolant drops around the back side of the front motor. This is a very slow leak; the coolant reservoir barely went down to the lower line in over a week now. So, without pressure testing it I couldn't really tell where it was coming from. The dealer calls and tells me that the standard warranty is up, truck has 40 k on it now. So, I argue with him, that isn't this part of the EV system and should be covered under the 100k milage. or 120k? Hs said NO. I talk to the tech and his boss. Come to find out it is a heater hose that is leaking? So, I say well the service writer should have said that before I started getting mad. Turns out the leak happens on charge when I have a departure time set, to warm the truck up. Makes sense to me. Any way, they did not disable the truck, ordered the hose and will install it next week some time. Hopefully my extended warranty will cover this. As I was told to get to this hose is a 4-to-5-hour job? $300 dollar hose and $170 dollar per hour shop rate. My $500 deductible will be nice. We shall see. They filed all the paperwork.

 

[TaxmanHog]

The dealer calls and tells me that the standard warranty is up, truck has 40 k on it now. So, I argue with him, that isn't this part of the EV system and should be covered under the 100k milage. or 120k? Hs said NO. I talk to the tech and his boss. Come to find out it is a heater hose that is leaking? So, I say well the service writer should have said that before I started getting mad. Turns out the leak happens on charge when I have a departure time set, to warm the truck up. Makes sense to me. Any way, they did not disable the truck, ordered the hose and will install it next week some time. Hopefully my extended warranty will cover this. As I was told to get to this hose is a 4-to-5-hour job? $300 dollar hose and $170 dollar per hour shop rate. My $500 deductible will be nice. We shall see. They filed all the paperwork.

Which came first the chicken or the egg?

I wonder how they'll view a multiple use part, PTC pump and hoses serve the cabin as well as the battery, which will they chose to cover this??

 

[Iroc34a]

Which came first the chicken or the egg?

I wonder how they'll view a multiple use part, PTC pump and hoses serve the cabin as well as the battery, which will they chose to cover this??

That's why I was getting pissed with the service writer. All I'm thinking is charging,batteries all EV connected warranty. Manager tells me it a heater hose only. But if it is in use while charging, should be considered part of the Ev stuff. But I have to fight these guys every time I walk in this dealer. I'll have to drive aways, but I'll try another next time.

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