Description

The Cummins Cylinder Head Gasket G-4089758 is a premium sealing component engineered to deliver a reliable, long-lasting seal between the cylinder head and engine block in Cummins diesel engines . This head gasket is a direct replacement for Cummins OE part number 4089758 , ensuring OEM-correct fitment, proper compression sealing, and dependable engine performance. Designed to withstand extreme combustion pressures and high operating temperatures, this gasket helps maintain cylinder compression while preventing coolant and oil cross-leakage. Precision-engineered sealing surfaces and reinforced fire rings ensure uniform clamping force across the head, supporting stable operation in heavy-duty and emissions-controlled diesel applications. The Cummins G-4089758 head gasket is commonly installed during upper engine repairs, cylinder head replacements, and complete engine rebuilds . Replacing the head gasket during overhaul helps restore factory performance, prevent overheating, and protect critical internal components.