It is ok to stir the pot.... helps a lot of people learn the different ways of thinking about these things..
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I could not find these parts listed here on Fastlane...checked that first... Whunter can probably provide these...
but for this thread .... the logic of one way or another... here is one way to take away some of the myths which are likely residing in some people's minds...... first since these are actual MB parts....and second because many have dealt with TURBO stuff... which on pistons is MUCH HIGHER COST.....
So the thing to do is look at the difference in labor and materials between using the used piston ,honing to fit ( if appropriate according to the FSM specs ) , and getting new rings for that used piston.. which might include cleaning up the lands or using wider custom rings to be correct in the ring fit dimension....
A NEW piston AND matched ring set....
$55 Mercedes Diesel Pistons & Rings 76-86 .8mm 240D 300D 300TD Mercedes Diesel Parts
Piston AND Rings $55
A NEW sleeve ....
http://www.**************.com/node/8974
Sleeve $29
The old bore will still have some honing which will be needed....and we are assuming that the used piston is large enough to fit according to specs in the FSM..
Whereas the new parts WILL FIT properly.... but require pulling ( plenty of stuff in archives of people doing this with just a hand puller..)... and that fits the FSM instructions also...
One thing many people do not understand ... even if they have been good general engine machinists ....is the extremely tight fit called for by MB to have a long lived non smoking engine....
Put the entire engine back together with USED parts to save less than $100 in NEW PARTS ?
I don't think so....