Crankshaft Rear Main Seal

DNJ Crankshaft Seal

DNJ® Crankshaft Rear Main Seals are essential components designed to prevent oil leakage at the rear end of the crankshaft where it exits the engine block. These seals are engineered for both direct-fit replacement and long-term reliability, helping maintain proper engine lubrication and prevent oil contamination of the clutch or flexplate / flywheel area.

DNJ® offers rear main seals in multiple configurations, including one-piece and two-piece designs, depending on the specific engine application. Many sets also include seal housings or gaskets when required by the original equipment design. All components are manufactured to meet or exceed OEM quality standards.

DNJ® Crankshaft Rear Main Seals are typically constructed from high-performance synthetic rubber or fluoroelastomers such as Viton®. These materials are selected for their superior resistance to high temperatures, oil degradation, and chemical exposure within the engine environment. The sealing surface often incorporates a spring-loaded lip or PTFE coating to enhance sealing efficiency and reduce friction. This combination of materials ensures the seal can withstand continuous crankshaft rotation while maintaining a tight seal to prevent oil leakage under pressure and thermal stress.

DNJ® also offers related components, including front crankshaft seals, timing cover seals, complete gasket sets, and more ensuring comprehensive coverage for engine sealing needs. With precision engineering and top-tier materials, DNJ® Crankshaft Rear Main Seals deliver exceptional performance and long-lasting durability.