All 116 and 117 alu blocks, and to my knowledge all 119 blocks are unlined.
Liners are available for repair purpose.
112 and 113 blocks are made from "normal" aluminum and have alusil liners.

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76 240 D. Bought in 1998 for $25.
85 300D. Got it for free with a bad engine. ( Sold )
60 Unimog 404. What was left of it, was given to me. Now powerd by 617A.
88 560 SEL. Bought without engine and trans. Now powerd by 617A.
67 250 SE. Cuope. For resto or sale.
64 220SE. For resto.