Coolant consumption ?

[Skye]

https://www.fcsdchemicalsandlubricants.com/resources/quickreferencecharts

Enclosed is a link to the Ford chemical and lubricant specification site. Attached is the coolant reference.

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[Zig]

 

[MustangNoob]

What’s your total mileage? Have you been a tracking? Worse case you could drain, flush, refill and monitor.

Almost 18k . No tracking. Lots of spirited driving though

 

[AZ_Ryan]

Almost 18k . No tracking. Lots of spirited driving though

I'm telling you, it's normal discoloration. Have the dealer verify it next time you are in for service and enjoy the car.

 

[roket]

this thread made me think about checking my own coolant, so i did, and this is what i was greeted by (system was cold)

i asked some techs at work and they told me to re-add some coolant and check back on it in a week. last time anyone did anything with it was when the cylinder head was replaced, the whole coolant system was emptied and re-filled

 

[Starship Enterprise]

Being the visible tank is just an overflow, I’m starting to wonder if there are other factors deciding how much gets dumped back in it after a drive. Mine went down a little, but next drive it could be back up to Max.

Now losing as much as Roket might be concerning.

 

[LouG]

Everyone thought that — you said it!

Yeah, my filter needs changing.

 

[LouG]

This thing about anti leak crap being added by the factory really astonishes me.
Never heard of that before.

 

[roket]

this thread made me think about checking my own coolant, so i did, and this is what i was greeted by (system was cold)

i asked some techs at work and they told me to re-add some coolant and check back on it in a week. last time anyone did anything with it was when the cylinder head was replaced, the whole coolant system was emptied and re-filled

well, i found out my issue was likely because the transmission fluid cooler was very slowly leaking coolant. there was evidence of such a leak, and i got it swapped out right quick. the system was not good at holding pressure before the repair, it took just a few minutes to lose 3 or 4psi. i also had to get the coolant reservoir and cap replaced because i guess after the pressure test the cap didn't click on like it used to

 

[Starship Enterprise]

Congrats on getting your issue sorted out! Thanks for the update.

 

[Frogdog1]

Being the visible tank is just an overflow, I’m starting to wonder if there are other factors deciding how much gets dumped back in it after a drive. Mine went down a little, but next drive it could be back up to Max.

Now losing as much as Roket might be concerning.

You mean you actually drove your car?? Be careful now, it will soon be over 1500 miles!!

J/K Starship. At least you take good care of your cars!

 

[MustangNoob]

well, i found out my issue was likely because the transmission fluid cooler was very slowly leaking coolant. there was evidence of such a leak, and i got it swapped out right quick. the system was not good at holding pressure before the repair, it took just a few minutes to lose 3 or 4psi. i also had to get the coolant reservoir and cap replaced because i guess after the pressure test the cap didn't click on like it used to

where was it leaking at ? and what was the evidence of leak ?

 

[Junkyard Dog]

Hrmph

more:

https://www.mustang7g.com/forums/threads/extensive-photos-24-gt-coolant-level-fluctuating.173179/

 

[Will2]

I suspect something flawed with the design of the coolant system hose fittings or the overflow tank cap, because I've also had inexplicable decreasing coolant on both a new '24 Eco and a new '25 GT. Now have a new '25 Eco and can also smell coolant after pulling into the garage. Too early to tell on my current car (<1000 miles) but I suspect it will slowly drop too. Since it's across different engines and model years, my best guess is it's systemic to the coolant system's design.

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