When your International Harvester C series tractor starts running rough, losing compression, or burning oil, worn intake valves are often the culprit. These valves control airflow into the combustion chamber of your 123 CID, 4-cylinder gas engine, and when they start leaking or seating poorly, you’ll feel it in reduced power and rough idle. This TISCO replacement valve gets your engine breathing properly again so you can get back to productive field work.
What You’re Getting
- Precise manufacturing that matches original factory specifications for proper fit and sealing
- Quality steel construction built to handle the heat cycles and valve train stress of farm work
- Direct replacement design – no modifications or special tools needed for installation
- TISCO quality that mechanics trust for reliable, long-lasting engine repairs
Built for Real Farm Work
This intake valve fits International Harvester’s workhorse C series tractors with the 123 CID 4-cylinder gas engine. These mid-size tractors are popular choices for hay operations, row crop farming, loader work, and general farm maintenance. Whether you’re running a disc harrow, pulling a hay rake, or operating a front-end loader around the farmyard, proper valve function is critical for the power and reliability these jobs demand.
Made to Last
Farm engines work hard in dusty conditions with temperature extremes that test every component. This valve is manufactured to handle thousands of opening and closing cycles while maintaining the tight seal needed for good compression. The hardened valve face resists the pounding from valve springs and rocker arms that’s part of everyday engine operation.
Installation Notes
This is a direct replacement that installs with standard valve service procedures. You’ll need to remove the cylinder head and use valve spring compressors for proper installation. A good time to replace valve guides and seals if they’re showing wear too. Pro tip: always lap new valves to their seats for the best seal and longest service life.
