Originally Posted by BillGrissom

Agree on oil pressure. My 84 300D drops to 2 bar at idle when hot. My 85 300D holds 3 bars even hot, but that engine appears almost new (no blow-by). What causes lower oil pressure is worn bearings with larger gaps.

Hard to tell in the youtube video (low frame rate). My engines have less large-amplitude, low-frequency vibrations and higher frequencies that like to excite the air cleaner (why I switched to 85 CA frame-mounted filter). My engines are probably a bit quieter, but hard to tell in a video. I have seen some 300D's that are so quiet you can barely tell they are a diesel (could have a Chevy SB?). Others, I can hear clearly when they come to the stop sign by my house, and notice them. My 85 300D used to sound like that, became hard to start in winter, then engine failed at 330K.