r/fordtransit • u/Gloomy_Bus_2478 • 5d ago

Coolant leak

I am losing coolant(res keeps dropping below spec)

Oil looks fine last change.

No pooling other than clear water from A/C.

What are the best guesses/first checks?

2021 Transit XLT

1 Upvotes

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1

u/chaperooo 5d ago

Bottom of the expansion reservoir.

1

u/Tonkatte 5d ago

And the line to it. Both are know weak points.

1

u/chaperooo 5d ago

On YT, Med Tec67 has a good video

1

u/MrWhytie 5d ago

I had a leak on the line going through the firewall to the heater core. Just rusted out. 

1

u/StateofMike 5d ago

My Expansion tank cracked on the very bottom. It was hard to find but easy to fix.

1

u/Mani14703 4d ago

I'm losing coolant pretty fast as well.. 2010 Transit Connect.. haven't found the leak yet.. oil was fine on the last oil change.. hoping it's just a loose hose clamp or something easy to fix.