So a few months ago I was driving to work with 6-8in of snow on the ground. Got stuck in a drift and waited to get pulled out,so I popped my hood to see how buried it was around the frame. The engine was caked in snow,like even the intake was covered. I got pulled out and the truck ran fine until I was almost home then it started knocking. Haven’t taken the engine out yet to look because I’m too mad at the truck,anyone have an idea what could be wrong? I still have full coolant and oil,they haven’t mixed. I wasn’t over 2700rpm trying to get unstuck either. It’s not my y pipe either,I figured that was the noise but it’s definitely an internal thump/: