Cold engine. Only turned the car on to pull it in the driveway from the street and up on some ramps. So maybe a minute of operation?

Was idling the car to look at the vibrating tensioner spring. See here:



I accidentally touched the shock and burned my finger. Like a real first degree burn. Even with ice, an hour later the fingertip still tingles. No blisters but red and very painful.

So a minimal amount of operation makes this thing literally burning hot.

Wonder if that’s related to the vibration I feel under speed? Beyond a point the engine is high enough rpm that the whole thing is unstable and shakes the engine (which is smooth as glass even on cold idle).

Thoughts??

__________________
Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (116k)
1991 350SD (206k)
1991 300D (228k)
2008 ML320 CDI (199k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (267k)

Past Diesels:
1983 300D (228K), 1985 300D (233K), 1993 300D 2.5T (338k), 1993 300SD (291k)