Description
When you’re rebuilding an engine or chasing down a power loss, worn exhaust valves are often the hidden culprit. This exhaust valve is designed for John Deere’s 404 CID turbocharged 6-cylinder engines (serial number 335846 and up) and 466 CID 6-cylinder diesel engines, both turbocharged and naturally aspirated. Made by TISCO, this replacement valve restores proper compression and gets your engine breathing right again.
What You’re Getting
- Inconel metal construction that handles extreme exhaust temperatures without warping or burning
- Precise manufacturing that matches original factory specifications for proper sealing
- Heat-resistant alloy designed specifically for the punishment of diesel exhaust applications
- Direct replacement for worn or damaged valves – no modifications needed
Built for Hard-Working Engines
These 404 and 466 CID engines power some serious John Deere iron, from mid-size utility tractors to larger row-crop machines that work long hours in demanding conditions. Whether you’re running a loader, pulling implements, or powering PTO equipment, these engines depend on exhaust valves that can handle the heat and pressure of diesel combustion cycle after cycle.
Made to Last
The Inconel metal construction isn’t just marketing talk – it’s the difference between a valve that lasts and one that burns up in a season. This high-temperature alloy resists the corrosive exhaust gases and extreme heat that destroy standard valves, especially in turbocharged applications where exhaust temperatures run even hotter.
Installation Notes
Engine rebuilds require six of these valves per engine. Always check valve guides and seats during installation – even the best valve won’t seal properly in a worn guide. If you’re doing a rebuild, consider having the seats professionally cut for optimal sealing. Remember to set valve lash to spec after installation and break-in.
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