Description

The Cummins Valve Cover Gasket 3902666 is a premium sealing component designed to prevent oil leaks and maintain proper crankcase sealing in Cummins diesel engines . This gasket directly replaces Cummins OE part number 3931015 , ensuring OEM-correct fitment, sealing integrity, and long service life. Manufactured from high-quality, oil-resistant materials, this valve cover gasket is engineered to withstand continuous exposure to engine heat, vibration, and oil saturation. Precision-cut sealing edges ensure a tight, uniform seal between the valve cover and cylinder head, helping to prevent oil seepage and contamination. The Cummins 3902666 valve cover gasket is commonly installed during upper engine repairs, valve train servicing, and complete engine rebuilds . Proper valve cover sealing is essential for maintaining engine cleanliness, reducing oil loss, and ensuring reliable long-term operation in heavy-duty diesel applications.