I think I misled, but no bother. I also think I have my answer, thanks everyone. I meant the chain guides (rails) not valve guides.

My oil consumption is not excessive, thought I do use more toward the end of the oil change cycle than when it is fresh. I use Shell Rotella 10/40 every 3.5k to 4.5k miles. Occasionally I get blues at startup, or a puff when I put the hammer down, but not always. I have not felt a rev limiter, but usually redline at the top of 1st or 2nd gear every day I drive it. Yes, the M103 is sweet. Between my father and I, my family currently owns 4 M103's. Yes I love my W124's. I've had my 300TE wagon at redline in 3rd at 105mph on the racetrack. Car ran better after that day.

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David
1986 300E Anthracite + ECodes + MB Mileage Award