4042122: RETAINER;VLV SPRG,EXHST

**Product Description** - **Functionality**: - The valve spring retainer secures the valve spring, ensuring proper engine valvetrain function. - Maintains pressure on the valve spring between the valve spring seat and the valve spring itself. - **Material and Design**: - Made from high-strength materials like carbon steel or titanium. - May use 4140 bar stock and heat-treated for durability. - Often features coatings for corrosion resistance, such as black oxide finish. **Specifications** - **Dimensions**: - Outer diameter: Approximately 1.37 inches (35 mm) - Weight: Typically around 0.1 lb (45 g) - **Compatibility**: - Fits various engine types, including agricultural, automotive, and heavy-duty diesel applications. - Compatible with both single and dual spring setups. **Applications** - Used in: - Internal combustion engines in vehicles - Agricultural machinery - Heavy-duty trucks **Maintenance Recommendations** - Recommended to replace valve spring retainers during engine assembly or maintenance to prevent failures. - They can develop hairline fractures from stress and heat exposure, risking catastrophic engine failure if not replaced. **Additional Information** - Some retainers may include integrated rotators (Rotocoils) to maximize valve life by ensuring even wear and preventing overheating. This comprehensive view showcases the valve spring retainer's critical role in maintaining engine performance and reliability.