Engine Clanking -WTF!!!

[Halon]

Thanks for the concerns everyone.

To answer some questions. Andrew, I suppose it is always possibly that somehow, something was inside a pipe that I didn't know about. It wasn't all that complicated to put the TB on. 4 nuts. And None of them were missing. If something is in there, I suppose I'll see it tomorrow when I have the head off. Maybe I've been missing a 10mm socket and I don't even know it yet, and it'll show up in Cyl 1!

Brian, yes I had just gotten the car washed. It was the Holiday gas station's drive thru touchless wash. My hood does have a big hole/vent in it, so it's possible that some water could have gotten into the engine bay. But to hydrolock the motor, I'm thinking that woul dhave happened instantly right? I mean, I drove for maybe 2 minutes after getting out of the car wash, and the car was running just fine. THen all a sudden, out of blue while in 3rd gear going a whopping 45mph, the horrible sounds started.

Tomorrow will hopefully shed a little light on things.