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I just got back from a drive and popped the hood, and my faint coolant smell is definitely just coming from the expansion tank lid. The plastic flip lid doesn't really seal, and I think that's on purpose. Otherwise it would probably pop. It needs to allow some air in and out as the coolant comes...
The OEM Ram OAT coolant is actually purple if you put it in a glass jar. On the Mopar container it says MS 90032. I don't know why they make the whole thing so mysterious. They should just write OAT really big on the container, then HOAT on the container for it. I think HOAT is typically more...
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