I recently did a radiator flush with my '99 Chevy Lumina 3.1L today since it started running close to overheating. The previous owner had it sitting in Ohio during one winter and then here in Arizona before I bought it for God knows how long. That being said, there’s rust build up in the radiator which is why I performed a flush. That actually fixed the temperature issue but now I’m not sure exactly what the part is (pictured below) but I am almost sure it’s leaking because after I shut my car off, there’s sizzling hot dirty water chilling right under the intake manifold area. Circled in red below is what is believed to be leaking and/or cracked.
What part is this? I believe it’s the “intake coolant line” but I’m not sure if that’s the actual name.