LostKiwi
Senior Member
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- Aug 25, 2006
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- '93 500SL-32, '01 W210 Estate E240 (RIP), 02 R230 SL500, 04 Smart Roadster Coupe, 11 R350CDi
They are steel liners cast into the block at manufacture. There are listings for +0.5mm pistons so it looks like a single rebore is permitted.I'm sure reboring isn't a option on the 642 Engines
As they are not conventional liners.
I know there can be issues with Nikasil or Alusil blocks where the pistons run direct in the aluminium.