I bought an 83' 240D with 117K miles on it. The #1 rod bearing was completely destroyed, knocked horribly. Upon disassembly I noticed that what was left of the rod bearings had "spun" over to one side of the rod. The journal on the crank was completely wasted, almost egg shaped. What caused this? I don't know?

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1983 300D 280,000
1983 300TD 125,000 Killed by oak tree.
1983 240D Sold
1986 Ford F250 Diesel 6.9l 169,000