If you felt like changing back to yellow, then fix your leak, flush your entire system, then refill with yellow.įor those who do your own coolant flush and fills, a good tool to have when it’s time to refill the system is a coolant lift. That would indicate some interchangeability between the coolant types, but as others have indicated the yellow has a longer lifespan than the green. I doubt there were any mechanical changes done to accommodate for this. If you look at the chart you will notice that there were still some vehicles that were using the green coolant about midway through the manufacturing year of 2003, but it looks like Ford made the decision to move to yellow coolant across the entire product line. Has your rig had a coolant flush in the past? If so, the shop that did the flush may have not put the correct coolant back in. 2003 looks like the year that Ford switched from green coolant to yellow/gold coolant. I found this link to a coolant type chart at Ford Parts. Perhaps one of you could help me understand if someone has mixed the yellow and green. Mixing Motorcraft Specialty Orange Engine Coolant or any orange-colored extended life product with your factory filled coolant can result in degraded corrosion protection. Do not add/mix an orange-colored, extended life coolant such as Motorcraft Specialty Orange Engine Coolant, VC-2 and VC-3 (US) or CXC-209 (Canada), meeting Ford specification WSS-M97B44–D with the factory-filled coolant.Note: Use of Motorcraft Cooling System Stop Leak Pellets, VC-6, may darken the color of Motorcraft Premium Gold Engine Coolant from yellow to golden tan. VC-7–B (CA, OR and NM), meeting Ford Specification WSS-M97B51–A1. Add Motorcraft Premium Gold Engine Coolant (yellow-colored), VC-7–A (U.S., except CA, OR and NM),.

I am not familiar with the yellow gold coolant and have never used it in other vehicles. I have not changed or added coolant to my 2006 f53 as I bought it used.

F53 radiator overflow tank