Description
When your 4020’s engine starts burning oil, losing compression, or just doesn’t have the power it used to, you know it’s time for a complete rebuild. This comprehensive overhaul kit gives you everything needed to bring that legendary 404 cubic inch diesel back to factory specifications—the kind of power that made the 4020 one of the most trusted workhorses in American farming history.
What You’re Getting
- Complete cylinder sleeves and seals for a proper bore restoration that seals tight
- New pistons with 3-ring design including keystone top compression rings for maximum seal
- Full set of connecting rod bolts, pins, bushings, and retainers for reliable power transmission
- Complete gasket set plus crankshaft seals to keep fluids where they belong
- Fresh intake and exhaust valves with springs, guides, and retainers for proper breathing
- Standard size rod and main bearings to restore proper crankshaft support
Built for Real Farm Work
The John Deere 4020 earned its reputation pulling heavy plows, powering combines, and handling whatever farm work you threw at it. This 6-cylinder, 404 CID diesel was the backbone of countless operations, and with this complete kit, you’re getting back to that original reliability and performance that made these tractors legendary.
Made to Last
Every component in this Tru-Power kit is built to handle the demanding conditions that 4020s work in every day. The sleeves are machined to precise tolerances, the pistons are designed for long service life, and the gaskets are engineered to seal properly under the heat and pressure these engines produce during hard work.
Installation Notes
This is a complete tear-down and rebuild job that requires proper machine shop services for bore measurements and crankshaft inspection. Make sure to check your connecting rod bolt length—you’ll need either 2.125″ or 2.325″ bolts depending on your specific engine. Take time to properly torque everything to specification and break in the engine gradually for the longest service life.
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