Thread: 2015 E350 4matic m276 in shop with locked up engine
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Old 08-31-2025, 03:20 PM
Frank Reiner Frank Reiner is offline
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Join Date: Feb 2011
Location: Modesto CA
Posts: 4,398
Quote:
Originally Posted by engatwork View Post
Owner said it was knocking before it stalled (locked up).

Only 276 engine failure I found on youtube was because serpentine belt went thru front main seal. Guy tearing it down finally got to a locked up oil pump but did not see any reason why it had locked up.

A variable speed/variable displacement oil pump must certainly constitute a crime against nature!
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