Cummins 4BT 3.9 and 6BT 5.9 Cylinder Blocks

Cummins 4BT/6BT Cylinder Block

Revive the performance of Cummins 4BT and 6BT engines with cylinder blocks from Diesel Parts Direct. Extreme overheating can cause cracks in the cylinder block, resulting in blue or blackish-gray smoke and poor performance of your engine. Bring your B Series engine back to life with 3.9 and 5.9 Cummins engine blocks from our online store.

We’ve spent over 40 years living, breathing and working with Cummins engines, so we know these diesels inside out. If you need advice while choosing the correct Cummins 4BT or 6BT engine block for your engine, pick up the phone and call 855.470.3525 to speak with our technical support team.

Trust Diesel Parts Direct to get your diesels up and running with cylinder blocks for Cummins 4BT and 6BT engines.





CYLINDER BLOCK - 4BT3.9 / 6BT5.9 / ISB3.9 / ISB4.5 / QSB3.9