Jorn, IIRC you had an M103 that was sludged? Is this the one?

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"Rudeness is a weak man's imitation of strength" - Eric Hoffer

No sludge in my 300SE, it's my daily driver and runs butter smooth.

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1979 Black on Black, 300CD (sold), 1990 Black 300SE, Silver 1989 Volvo 780, 1988 300CE (vanished by the hands of a girlfriend), 1992 300CE (Rescue).

Sorry, my mistake, I was thinking of someone that revived a very sludged M103 and was wondering if it survived. It looked like FlexSeal under the valve cover.

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"Rudeness is a weak man's imitation of strength" - Eric Hoffer