Adjusted the valves on the 240D today and was shocked to see signs of wear on #1 cyl. exhaust valve camshaft lobe..... am guessing previous owner was slack on oil changes and maintaining valve adjustment.

What are preventive measures to sustain healthy camshafts...... replacement of acorn nuts that rub against the lobe?

If it crunches down to replacing the camshaft and its stantions in another 50k miles - I'm also wondering if different cams are available - knowing that MB provides superior performance camshaft grind on Euro spec gasoline engines.

-Sorry no pic showing camshaft wear.... i tried but crummy camera could not pick up scuffs on camshaft lobe.

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'80 300SD/ w116
'79 240D 4-spd
'71 750cc Guzzi

previously owned:

'83 240D 4-spd
'77 280SEL 4-spd
'74 280/8
'72 250/8
'65 220Sb 4-spd
'63 220Sb 4-spd
'63 190c 4-spd
'61 220Sb 4-spd
'60 190b 4-spd