Interstate-McBee Cummins 4BT 3.9L Engine Overhaul Kit

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Interstate-McBee Cummins 4BT 3.9L Engine Overhaul Kit


This is a complete kit that will give you the majority of the components needed for a complete engine rebuild for your 8 Valve, mechanically injected, 4BT Cummins engine.  We use this kit for our own rebuilds.


  • Please be sure to order the correct components from the menu below.  Goods that have been opened are not available for return.  If you have any questions, please feel free to contact us.
  • If your cylinder block needs machining, make sure to ask your machinist what piston size you will need. There is a 20% restock fee and you must pay for the shipping to return the kit if your piston size is wrong.
SKU: MCBEEOH38021324B Categories: , ,


Piston Size

  • Kit includes 6 pistons. We offer the pistons in three sizes: standard (stock), 0.50mm (0.020 over), and 1.00mm (0.040 over). Please choose from the options above.

Rod Bearing Size

  • Kit includes 12 rod bearings. We offer the rod bearings in five sizes: standard (stock), 0.25mm, 0.50mm, 0.75mm, and 1.00mm

Main Bearing Size

  • Kit includes 1 main bearing set. We offer the main bearing set in five sizes: stock, 0.25mm, 0.50mm, 0.75mm, and 1.00mm over stock.

Serial #

  • For complete accuracy, we prefer to have the Engine Serial Number. The ESN is listed on the drivers side valve cover and is eight digits long. Please enter this into the text box above. If you have any trouble locating it, you can opt to leave it blank or give us a call.


  • Lastly, on the same plate as the ENS, you'll find a four digit number, which is the CPL. Please provide this number below.

Additional information

Weight 35 lbs
Dimensions 38 × 4 × 12 in