Description

When you’re dealing with low compression, rough idle, or that classic tick-tick-tick of worn valves, your engine’s trying to tell you something. These intake valves seal the combustion chamber and control the air flow that makes power possible. A bad valve doesn’t just rob your tractor of power—it can let combustion pressure blow past and damage the cylinder head, turning a valve job into an expensive rebuild.

What You’re Getting

Precision-ground valve face that seals tight against the seat for proper compression
Heat-treated construction that handles the thermal stress of diesel combustion cycles
Direct OEM replacement design that fits without modifications or machine work
Quality materials that resist warping and burning even under heavy loads

Built for Real Farm Work

This valve works in John Deere’s 270 CID 4-cylinder engines (serial number 280001 and up) and 404 CID 6-cylinder engines (serial number 215000 and up), plus 404 CID turbocharged engines up to serial number 245546. These are the engines that powered countless hours of plowing, cultivating, and harvest work on farms across the country. Whether your tractor’s running a loader, pulling tillage equipment, or powering a PTO implement, these valves handle the job.

Made to Last

Farm engines work hard, and intake valves take a beating from constant heating and cooling cycles. This TISCO valve is built to handle temperature swings from cold morning startups to all-day operation under load. The materials and heat treatment process ensure it keeps sealing properly season after season, maintaining the compression your engine needs for reliable power.

Good to Know

Valve replacement is precision work that’s usually best left to a qualified engine shop with the right tools to ensure proper seating and clearances. If you’re doing the work yourself, make sure to check valve-to-piston clearance and have the seats professionally reground if needed. A quick tip from the field: when one valve goes bad, it’s often wise to do them all—they’ve all seen the same hours and conditions.