5.9/6.7 C OE Rear Main Seal 89-18

Part: 5.9/6.7 C OE Rear Main Seal 89-18

Part number: 5259499

Manufacturer: Cummins

Description:

This Cummins part is the Rear Main Seal designed for 5.9L and 6.7L Cummins engines. This seal is specifically for engine models from 1989 to 2018 and plays a crucial role in preventing oil leaks from the rear of the crankshaft, where it exits the engine block.

The rear main seal is used to prevent engine oil from leaking out from the rear of the crankshaft as it exits the engine block. It provides a seal between the crankshaft and the engine block, helping to maintain proper oil pressure and prevent any oil loss or contamination. This is especially important for maintaining the engine’s lubrication system and preventing engine damage.

This seal is used in the rear of the engine block where the crankshaft exits, sealing the area around the crankshaft. It’s commonly replaced when performing major engine maintenance, such as replacing the clutch, flywheel, or during other internal engine repairs.

By preventing oil leakage, the seal ensures that the engine’s oil pressure remains consistent, which is critical for proper engine lubrication and cooling.

The rear main seal also keeps contaminants like dirt and debris from entering the engine through the rear of the crankshaft, which could cause wear or damage to internal engine components.