Does having an engine built/assembled at a particular location (tonawanda) imply the cranks/bearings were machined from a different mill than an engine different assembled at a different location (bowling green/spring hill)?
I assumed all the cranks/bearings same from a sole source, regardless of point of assembly. Still unclear whether or not LT1s got the exact same bearings as L87 but people say the part numbers are all the same, so... I dunno.
Quote:
The defective crankshafts and connecting rod bearings for the 6.2L L87 V8 engines, which prompted a massive recall of 2021-2024 GM trucks and SUVs, were sourced from a supplier located in Mexico.
Crankshaft Supplier: The problematic crankshafts were manufactured by Questum Macimex in Mexico.
Connecting Rod Supplier: The connecting rods were provided by American Axle & Manufacturing.
Root Cause: The issues stem from machining defects, specifically improper surface finishes or incorrect dimensions on the crankshafts and sediment in the oil galleries.
Engine Assembly Locations: While the parts were sourced from these suppliers, the L87 engines themselves were built at GM's Tonawanda, New York; Spring Hill, Tennessee; and St. Catharines, Ontario plants. Some reports specifically point to the St. Catharines plant for assembling the defective units.
There is no information in the recall documents that definitively states Questum Macimex supplied the LT1 crankshafts, or that LT1 engines are part of the current L87 recall.
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