Description

When you’re rebuilding your tractor’s engine, there’s no cutting corners on cylinder head bolts. These bolts are what keep your head gasket sealed tight and your engine running smooth—if they stretch or fail, you’re looking at coolant in the oil and an expensive mess. This set of nine precision-manufactured bolts takes the guesswork out of your engine rebuild.

What You’re Getting

Set of nine high-tensile steel bolts engineered for proper torque retention
112mm length and 11.33mm diameter sized exactly for your engine block
1/2 UNC thread pitch that matches factory specifications perfectly
Heat-treated steel construction that resists stretching under engine stress
Direct replacement for original equipment—no modifications needed

Built for Real Farm Work

These bolts fit a wide range of John Deere tractors from the compact 30 series utility models up through the powerful 7000 series field machines. Whether you’re working on a 1040 that’s been hauling feed or a 4050 that’s been pulling heavy implements, these bolts handle the combustion pressures and thermal cycling that come with hard farm use.

Made to Last

Engine bolts aren’t something you want to replace twice. These are manufactured from high-grade steel that’s heat-treated for the right balance of strength and ductility. They’ll torque down properly without stretching and maintain that critical clamping force through thousands of heat cycles.

Installation Notes

Always replace cylinder head bolts as a complete set—mixing old and new bolts leads to uneven clamping and gasket failure. Clean the block threads thoroughly with a thread chaser before installation, and follow your service manual’s torque sequence and specifications exactly. Apply a light coat of engine oil to the threads and under the bolt heads for accurate torque readings.