Description

When you’re tearing into an engine rebuild or dealing with poor compression, worn valve springs are often the culprit. These little coils work hard every time your engine fires, opening and closing valves thousands of times per minute. When they start losing tension, your valves don’t seal properly, and you’ll notice rough idle, loss of power, and fuel getting where it shouldn’t be.

What You’re Getting

Precision-wound spring maintains proper valve timing and sealing pressure
Heat-treated construction handles the constant stress of engine operation
Direct replacement for original International Harvester specifications
Quality materials resist fatigue and maintain spring tension over time

Built for Real Farm Work

This spring fits the 4-cylinder gas 123 CID engines found in International Harvester’s workhorse tractors from their classic era. These engines with their 3-1/8 inch bore and 4-57/64 inch valve length powered everything from cultivation to harvesting in the golden age of American farming.

Made to Last

Engine valve springs take a beating from constant compression and expansion cycles, plus the heat and vibration of hard farm work. This TISCO replacement is built to handle the demands of agricultural use, maintaining proper valve operation through long days in dusty conditions.

Good to Know

When replacing valve springs, it’s smart to do them all at once since they tend to wear at similar rates. These engines use 8 valve springs total, so you’ll need multiple springs for a complete rebuild. Always check valve guides and seats while you’ve got the head apart—no sense putting new springs on worn valve components.