Isx15 popping radiator caps

[Waterloo]

That looks more like a manufacturer defect in that cap. When my liner dropped, the cap would simply release pressure. Remove the cap, and it was shooting coolant many feet in the air, like well over the roof of the cab, like a volcano. My point being, if you did just recently drop a liner, I don’t see it building that much pressure to split the cap like that, if you get my drift? That just does not look normal.