3957987 Crankcase Breather Filter For Cummins

The part number 3957987 is a Crankcase Breather Filter Housing assembly. It serves as a vital component in the engine’s crankcase ventilation (CCV) system.

Primary Function: It mounts directly on top of the valve cover to allow built-up pressure and exhaust gases to safely vent from the engine’s crankcase. A fresh filter prevents clogging, oil leaks, blown seals, or excessive oil passing into the turbocharger.

Common Applications:

2003–2005 Dodge Ram 2500 & 3500 pickups equipped with the 5.9L 24V Cummins Turbo Diesel engine.

Tier 3 8.9-liter ISL / QSL and 8.3-liter ISC / QSC industrial and commercial truck engines.

Interchange Part Numbers: 3957926, 3964093, 4935078, and 4935079.

3957987 Crankcase Breather Filter For Cummins

3957987 Crankcase Breather Filter