The E class that I just went thru front d/s failure on is now back with a locked up engine. Owner said it was knocking then stalled. He towed it in and engine will not turn over with long breaker bar. Anyone seem this? I was under impression the 276 engine was a good engine. I talked to friends at dlr in Macon and they said they have not seen a locked up 276.

Car has 167k miles and oil level looks good, oil was last changed during May.

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Jim