Rectangular Seal

The 3049302 Rectangular Seal provides a tight, reliable seal in engine oil cooler passages and other rectangular-groove interfaces found on Cummins and Detroit Diesel platforms. Its Buna-N (Nitrile) construction ensures excellent oil resistance and long service life under heat and vibration. This seal is engineered to OEM dimensions for a perfect fit that prevents internal and external leaks, making it essential during maintenance, rebuilds, or component replacement.

Freightliner Part No: 3049302

$12.09

Specifications

Freightliner’s 3049302 Rectangular Seal is widely used across heavy-duty engines requiring a rectangular sealing ring for oil cooler housings, oil manifold interfaces, and other precision-sealed engine components. Cataloged for Cummins 855/88NT and Detroit Diesel Series 60 applications, this seal delivers consistent compression and reliable leak protection. Its Buna-N 70-durometer material resists high-temperature oil exposure, pressure cycling, and vibration. When servicing oil coolers or engine sealing surfaces, replacing worn rectangular rings like this one helps maintain proper lubrication flow, system cleanliness, and long-term engine performance.

Weight

0.02

Compatibility

Cummins 855 / 88NT Engines (approx. 1980s–1990s)

Used in:

Freightliner FLD — various years

Freightliner FLC — various years

Detroit Diesel Series 60 Engines (approx. 1987–2010)

Used in:

Freightliner Century Class

Freightliner Columbia

Freightliner Cascadia (early models)

Freightliner FLD Series

Freightliner Coronado