There are gaskets that seal the upper to lower intake plenum chambers together that fail over time. They are not fun to replace but after 20 years, they need to be done.

Not sure what spec is on the M117 for hot idle with load and without. I have a few vac leaks on mine.

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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]