Coolant Leak 2018 Max

18MaxPlat · Nov 5, 2018

Anyone else have coolant disappearing from their 2018 Expedition Max?

I got the vehicle on July 2nd. A photo that I took under the hood when I picked it up from the dealer shows coolant up to the reservoir max line (engine cold). At the end of October, after 4 months of operation and about 4300 miles, it had dropped to the minimum line (engine cold). It took 27 ounces of coolant to bring it back to the max line.

I haven't been able to find any evidence of an external leak. I'll be taking it to the dealer for a pressure test, but wanted to know if anyone else has had the same issue. I haven't found any other online complaints about this happening to the 2018 Expedition.

Uturn · Nov 5, 2018

Coolant reservoir max line is for a hot engine, if filled to max cold the engine will push the excess coolant out when hot. Try running at the minimum line when cold. If you then lose coolant you have an issue. On my 6.0 ford the coolant is now run 3/4 of an inch below minimum, per Fords revised spec, cold and does not lose coolant. Anything above that and the first time it runs hard the coolant will end up back at the 3/4 below minimum mark.

5150 pops · Nov 5, 2018

I had to add a third or so of 50/50 orange to mine, but I didn't think too much about it. I haven't been all to gingerly with the vehicle.

If you let it get low enough, and do your best to encourage warpdrive from a standstill, you will be greeted with an illumination from your gauges, and a hard cut to your propulsion - simultaneously.

Yes, I speak from experience.

EDIT, got mine last couple days of July, currently have a about 3100 miles, and the little incident happened about 3-4 weeks ago. Actually it happened the day before I cracked off a 13.55 ET at the 1/4 mile Dragstrip.
It's a v6, at it's core, a small one too and it's being asked to move 6000lbs plus cargo, fatasses, and possibly a trailer, all at the same time. Mild temps, only add to the stress if you're an a/c has to be on, all the time, too, like me

Sgt Darkness · Nov 5, 2018

5150 pops said:
I had to add a third or so of 50/50 orange to mine, but I didn't think too much about it. I haven't been all to gingerly with the vehicle.

If you let it get low enough, and do your best to encourage warpdrive from a standstill, you will be greeted with an illumination from your gauges, and a hard cut to your propulsion - simultaneously.

Yes, I speak from experience.

EDIT, got mine last couple days of July, currently have a about 3100 miles, and the little incident happened about 3-4 weeks ago. Actually it happened the day before I cracked off a 13.55 ET at the 1/4 mile Dragstrip.
It's a v6, at it's core, a small one too and it's being asked to move 6000lbs plus cargo, fatasses, and possibly a trailer, all at the same time. Mild temps, only add to the stress if you're an a/c has to be on, all the time, too, like me

So, your coolant is orange too......I've saw several pics where they have the orange.....weird, mine has the yellow. Tow package maybe? Just thought why is mine yellow and the others are orange??

5150 pops · Nov 6, 2018

Sgt Darkness said:
So, your coolant is orange too......I've saw several pics where they have the orange.....weird, mine has the yellow. Tow package maybe? Just thought why is mine yellow and the others are orange??

Maybe you and I are both colorblind, and don't realize it?

I say that, because I thought it looked PINK, and I STILL think it looks pink after having added orange to it.

Seriously, I think the reservoir's own color/tint dilutes the appearance.

Fwiw, I thought they all took the same spec motorcraft coolant.

Sgt Darkness · Nov 13, 2018

As long as it does it’s job I really don’t care what color it is. Verified my color through five other folks and all said yellow. I know GM had some problems with their pink stuff causing gasket degrading and manifold leak problems. Haven’t heard of any problems with the yellow stuff so I’m glad for that.

99WhiteC5Coupe · Nov 13, 2018

Sgt Darkness said:
So, your coolant is orange too......I've saw several pics where they have the orange.....weird, mine has the yellow. Tow package maybe? Just thought why is mine yellow and the others are orange??

Beginning July 9, 2018, and after, Ford began using the “new” yellow Motorcraft engine coolant in the Expedition and other truck models.

Sgt Darkness · Nov 13, 2018

99WhiteC5Coupe said:
Beginning July 9, 2018, and after, Ford began using the “new” yellow Motorcraft engine coolant in the Expedition and other truck models.

Good deal C5 Coupe, appreciate it much.....

JohnT · Nov 13, 2018

Just to confuse things they also use Motorcraft "Gold" cooling fluid which apparently you shouldn't mix with "Yellow" Sigh, how the hell as a layman are you ever even going to know the tech screwed up and mixed coolants which trashes a headgasket a few years later. Good luck reverse engineering that f**k up

"2018 Expedition/Navigator, 2018-2019 F-Super Duty, 2019 E-Series and F-650/F-750 vehicles built on or after 9-Jul-2018 are filled with the new Motorcraft Yellow Antifreeze/Coolant. When servicing the cooling system(s) on these vehicles, use Motorcraft Yellow Antifreeze/Coolant VC-13-G (CVC-13-G for Canada). Do not mix different colors or types of coolant, including mixing Motorcraft Yellow with similarly colored Motorcraft Gold. Monitor OASIS for updates."

JohnT · Nov 13, 2018

For the terminally bored

https://www.motor.com/magazine-summ...-not-easy-being-green-or-yellow-or-orange-or/

Coolant Leak 2018 Max

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