A rebuilt engine for a Mazda MX5 NA (1989–1997) is completely disassembled and rebuilt using inspected parts that are replaced as necessary. Internal parts such as bearings and seals are replaced to ensure the engine can operate reliably again. Pistons are replaced only if necessary; if they are still within specifications, the original pistons are reused. The engine is then assembled with the correct tolerances and adjustments, ensuring that all components work optimally together with the internal rotating parts—such as the crankshaft and pistons—in the car’s engine block.
