The plastic shroud could have slipped down when someone tried to re-attach it with spring clips. Two at the top. The radiator is also spring clips at top, fits in a groove at bottom. Exam each and every fan blade tip, if one is partially snapped off will increase wear on other parts.

I also recently bought a high miles 91 300TE, was sounding good. I had oil changed and a new Mann filter, used Shell Rotella 15W40. Drove 15 miles and parked it. Next morning made a clattering noise for several seconds, which went away. I took this to be the chain tensioner. Added Marvel Mystery Oil and have not heard that noise again, even though it has been 14F where I park. I will burn a chicken to honor the sludge removal formulators and snake oil sales weasels.

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91 300 TE 235K
93 Cabriolet 155K sold
92 300 TE 200K boneyard