Low coolant levels - where is it going? Ecoboost

[DTF-Garage]

Did they figure out what the issue was? I just had my oil changed in my Maverick and the reservoir was almost completely empty. Haven't had any issues overheating and no signs of leaking coolant, Ecoboost, 2022 35k miles. Luckily they caught it before my B2B warranty is up, but I'm really hoping it's not the cylinder head gasket.

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[40caliber]

Head gasket leak not uncommon.

Quite UNcommon

 

[EONR24]

Did they figure out what the issue was? I just had my oil changed in my Maverick and the reservoir was almost completely empty. Haven't had any issues overheating and no signs of leaking coolant, Ecoboost, 2022 35k miles. Luckily they caught it before my B2B warranty is up, but I'm really hoping it's not the cylinder head gasket.

A lot of these new vehicles make coolant flanges and thermostats out of plastic. I would assume that is where issue is at. I would do a coolant pressure test and/or look for coolant residue with the underbody off.

 

[Big Kahuna]

They never found anything wrong, coolant level has remained steady over the winter and haven’t had the smell in the cab again. I’ll be interested to see if I end up with any issues over the summer.

 

[Jeff D.]

I don't know if this will be helpful or not, but I'll throw it out there:

Back when I owned semi's and drove OTR I had a few brand new trucks. I had a 2000 Freighliner and 2003 Mack that both had silicone coolant hoses. These hoses didn't have many of the problems the normal rubber hoses have, like hardening or cracking, but they did have one irritating tendency. They leaked at the connections when cold. Alot!

They even had special hose clamps that had springs built in to keep a constant pressure, and they still would leak when cold. I'd go out for two weeks and not leak a drop of coolant. I'd come home for a couple days and leak 1/2 gallon on the ground from hoses all over the truck.

I even would plug the trucks block heater in when it was 20 degrees for the weekend just because the added heat would slow alot of the leaking.

I don't know if manufacturers have come up with a fix, but could certainly see how these cold leaks could still be present in some vehicles. Start them up, and no leaks. Park them outside at zero degrees and find spots of orange (or green) in the snow underneath the next day.

Might be something to atleast look at if you have a coolant lose you just can't figure out. It's hard to diagnose as the leaks stop when the vehicle warms up.

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