Woah. No idea what tractor anti freeze is composed of. Google search?
Anyways, does the 7er have an expantion tank? Might be idea to drain that, then refill, then idle the car. If you did that three times, seems like most of it would be gone?
But yeah, no idea what that stuff would do. If it were mine, I'd get it replaced.
“Character is doing the right thing when nobody’s looking. There are too many people who think that the only thing that’s right is to get by,and the only thing that’s wrong is to get caught.”
- J.C. Watts Jr.