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@milane As Treks said, the problem with these engines is the apex seals. They wear out pretty quickly causing the engine to lose compression then it won't start when it's warm. Most of these engines need rebuilt at around 60k miles but some need a rebuild as low as 30k. They like to use a lot of oil too. Although in saying that they're bad, they're fantastic when they're working. And the RX-7 was one of the coolest cars ever built, way ahead of it's time when it was first released. The graphic below shows more or less how one of these engines work,