Description
When your 4239D engine starts blowing smoke, running rough, or just doesn't have the power it used to, it's time for a complete overhaul. This naturally aspirated four-cylinder diesel has been the heart of countless John Deere tractors from the 300 series through many other models, and a worn-out engine means downtime you can't afford. This comprehensive rebuild kit brings your trusty 4239D back to factory specs with everything you need in one box.
What You're Getting
- Complete gasket set seals up every joint and surface for a leak-free engine
- New sleeve, piston, and rings restore proper compression and eliminate blow-by
- Fresh rod and main bearings give you smooth, quiet operation for years to come
- Low ring piston marked RE11509 meets John Deere's original specifications
- All components work together as a matched set for reliable performance
Built for Real Farm Work
The 4239D engine powered a wide range of John Deere equipment including tractors like the 2650, 2750, 2850, 3040, 3140, and many others in the utility and row-crop categories. It also ran in combines, loader backhoes, excavators, and crawler tractors where dependable power was essential. Whether you're restoring a reliable workhorse for daily use or rebuilding a piece of equipment that's been in the family for decades, this engine has proven itself in every farm application.
Made to Last
John Deere built the 4239D to handle the demands of agricultural work, and this rebuild kit maintains that standard. The gaskets are made from materials that resist the heat, pressure, and chemicals found in diesel engines. The sleeve and piston are manufactured to tight tolerances for proper fit and long life, while the bearings use quality materials that handle heavy loads without premature wear.
Good to Know
This is a naturally aspirated engine, so make sure you're not working on a turbocharged 4239T version. The low ring piston design helps reduce oil consumption while maintaining good compression. Plan on having the block and head checked by a machine shop during your rebuild—it's the perfect time to ensure everything is straight and true for maximum life from your new parts.