2017 Ram 2500 6.7 engine visibly shaking at idle

[montanabound]

Hi, I’m new to diesels and I went to look at a used 2017 2500 today that was used as a plow truck with 32k miles on the odometer. Upon starting it and opening the hood I could visibly see the engine slightly vibrating or shaking at idle. Is this normal, I apologize for my ignorance? The undercarriage was in rough shape due to the salt used. It didn’t vibrate in the cab or through the steering wheel or throttle at all. Thanks for everyone’s input!

 

[flan]

To an extent it’s normal, they are mounted on basically rubber bushings so the vibration isn’t felt in the truck.