His crank shows one journal tha thas been heated up quite hot AFTER it was made....heat reating and such take place over the entire crank at once equally....having worked with a LOT of metal this was a localised heating...and could not have happened in the engine. Becasue the bearing shells would have turned to goo at the temps that did that. But memory escapres me of what temps were required to discolor the crank like that.

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Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
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Section 609 MVAC Certified
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"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche