GM 54-Degree V6 Engine
General Motors' Opel subsidiary in Europe designed a compact V6 engine with an odd 54° vee angle. It was an iron block/aluminum head DOHC design with 4 valves per cylinder. All 54° engines were assembled at Ellesmere Port in England.
This engine was used in American models as well. The engine was reworked substantially between the 3.0 L L81 and 3.2 L LA3, but the bore centers and deck height were retained. In its 3.0 L form, this engine was notable for recalls of all units installed in Cadillac Cateras due to timing belt tensioner bearing failures, which could cause catastrophic damage to the engine because of its interference design.
Read more about GM 54-Degree V6 Engine: L81 3.0, 2.5, 2.6, LA3 3.2
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—Unknown. New York Weekly Mirror (July 5, 1845)