Description

This front crankshaft seal is a precision-engineered sealing component designed for heavy-duty diesel engines requiring OEM part numbers 3904353 and 3804899. The front crankshaft seal prevents engine oil from leaking at the crankshaft nose, protecting belts, pulleys, vibration dampers, and surrounding components. Manufactured from high-performance, oil- and heat-resistant sealing materials, this seal is built to withstand continuous crankshaft rotation, high RPM operation, and extreme diesel engine temperatures. Proper sealing helps maintain correct oil pressure, prevents contamination, and extends overall engine service life. This single-piece front crankshaft seal is ideal for lower gasket set service, engine rebuilds, timing cover reseals, and preventive maintenance. Designed to OEM specifications, it ensures precise fitment, smooth crankshaft contact, and long-lasting leak protection. Key Benefits: OEM replacement for 3904353 / 3804899 Prevents front crankshaft oil leaks Oil- and heat-resistant construction Protects belts, pulleys, and front engine components Maintains oil pressure and engine cleanliness Suitable for heavy-duty diesel engine rebuilds