Is the S55 engine in the F80 M3, F82 M4, and M2 Competition really prone to rod bearing failure? In this video, we inspect a 130,000-mile S55 engine to find out the real story. We go under the valve ...
This video presents a full tear-down of the BMW S55 engine from an F82 M4 with 130,000 miles, focusing on crank hub wear—a known issue in high-mileage and tuned applications. We examine wear patterns, ...
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