Category Archives: Cummins 4BT

Cummins 4BT – Damage From Non-filtered Air

Loose connections or cracks in the suction side of the intake pipe and after the air filter can allow debris to be ingested by the engine causing rapid wear in the cylin­ders. Leaks at the intake manifold, unsealed bolt holes or man­ifold cover gasket can also allow dust and dirt to be in­gested into naturally… Read More »

Cummins 4BT – Expansion Plug – Replacement

Remove the expansion plugs from the oil passages. To Install the Expansion Plugs Apply a bead of Loctite 277 around the outside diameter of the lubricating oil passage expansion plugs. Drive the expansion plugs in until they bottom in the bore. Fill the engine with lubricating oil. Operate the engine and check for leaks. Stop… Read More »

Cummins 4BT – Gear Cover – Installation

Lubricate the front gear train with clean engine oil. Caution: The seal lip and the sealing surface on the crankshaft must be free from all oil residue to prevent seal leaks. Thoroughly clean the front seal area of the crankshaft. NOTE: Always replace the front seal when removing and installing the gear cover. 10 mm… Read More »

Cummins 4BT – Lubricating Oil Pump – Installation

Lubricate the lubricating oil pump with clean engine oil. Install the lubricating oil pump. 13 mm Tighten in the sequence shown. Torque Value: 24 N*m [18 ft-lb] NOTE: The back plate on the pump seats against the bottom of the bore in the cylinder block. When the lubricating oil pump is correctly installed, the flange… Read More »

Cummins 4BT – Lubricating Oil Pump – Clean and Inspect

If the lubricating oil pump is to be inspected for reuse, follow these steps. Visually inspect the llubricating oil pump gears for chips, cracks, or excessive wear. Remove the back plate. Mark “TOP” on the gerotor planetary. Remove the gerotor planetary. Inspect for excessive wear or damage. Clean all parts in solvent and dry with… Read More »