Just replaced valve guide seals on the SL and noticed my 300D is putting out smoke on start-up, which it never did before. At least not this much. Engine has 277,000 miles on it and never had any work done to it. Still going strong, but wondering if valve guide seals is a repair that is done on diesel engines, or is solely for gasoline ones??? Thanks.

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Don
'85 500SL (Euro) - 186,000 w/a complete restoration and engine rebuild at 154,000
'95 C280 - 174,000