Brian, especially if that lower grommet is pliable, I think your initial intention is correct - I'd leave it alone. Chances are that it was replaced by previous owner. Besides, while it's no walk in the park, it's doable, and it's only a little easier with the head off. Plus, the SD has the A/C hoses on the left side, so it's not as tough as what Rob had to do.

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'82 300SD - 361K mi - "Blue"

"Good judgement comes from experience. Experience comes from bad judgement."

listen, look, .........and duck.