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Is the HEMI 5.7L V8 reliable through Canadian winters?
The HEMI 5.7L (Eagle engine) is mechanically tough, but two points deserve attention in a Canadian context. First, the Multi-Displacement System that deactivates four cylinders under light load can cause light hesitation below -15°C — many owners disable it via a Diablo or HP Tuners module. Second, spark plugs must be replaced rigorously at 60,000 km to prevent misfires; neglected plugs cause the engine to run rough almost immediately in cold weather. Outside those two items, the 5.7L is one of the most durable American engines on the used market, with many examples crossing 250,000 km still in daily service.