Description

When you’re hearing that telltale knock from under the hood or your turbo diesel isn’t pulling like it used to, you might be looking at worn pistons and sleeves in your big turbocharged 404. This kit puts the power back where it belongs—inside the combustion chamber instead of rattling around loose. Whether you’re planning a full rebuild or just need to address a few cylinders, this sleeve and piston kit gives you everything to get that 404 back to breathing right.

What You’re Getting

Complete set of sleeves with seals that fit properly and seal tight
3-ring pistons designed to handle turbo pressures without breaking down
Pins and retainers that keep everything aligned where it should be
One kit handles a 6-cylinder 404 CID turbocharged diesel (serial number 335846 and up)
Direct replacement—same specs as what came in your engine originally

Built for Heavy-Duty Work

The 404 cubic inch turbocharged diesel was John Deere’s muscle engine for serious farm work—powering the big row-crop tractors that pulled wide implements through tough ground. These engines ran hard in everything from planting season marathons to harvest time when you couldn’t afford downtime. This kit restores the compression and sealing that made these engines legendary for torque and reliability.

Made to Last

Rebuilding an engine isn’t something you want to do twice, so this kit is built with materials that can handle turbo heat and pressure cycles season after season. The pistons are designed to expand properly under load while the sleeves maintain their bore dimensions even with thousands of hours of operation ahead.

Good to Know

This is serious engine work that requires proper measuring, honing, and assembly techniques. If you’re not set up for engine rebuilding, find a shop that knows diesel engines—proper clearances and torque specs make the difference between a long-lasting rebuild and expensive problems down the road. Always check your serial number to confirm fitment before ordering.