John Deere 450C Engine Major Overhaul Kit - AT86984 An engine rebuild kit can add years of life to your old John Deere 450C tractor and help reduce wear and tear on other parts of your machine (such as the cooling and exhaust systems). The kits we sell offer the quality tractor parts you need in one package at a much lower price than if you were to buy the parts individually. john deere 450 engine | eBay Find great deals on eBay for john deere 450 engine. Shop with confidence. Skip to main content. eBay Logo: Engine Overhaul Kit For John Deere 450C 2030 2420 2530 4 Engine. John Deere 4 engine rebuild kit 4 overhaul kit Large Pin 480B 450C 450D. Brand New. $782.