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Category Archives: Cummins 4BT and 6BT Issues

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P7100 Fuel Pump Modifications for the 8 Valve 4BT

P7100 Fuel Pump Modifications for the 8 Valve 4BT
4BT Engine History and Background 4BT (3.9 L) 140 HP Engine The Cummins 4BT has mostly been utilized in applications such as box trucks, small industrial vehicles and agricultural equipment. The 4BT is pretty much just a downsized version of the famous 5.9L 12V Cummins as these engines share almost all of their parts such…
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Is the Cummins 12 Valve 5.9L the Best Diesel Ever Built?

Is the Cummins 12 Valve 5.9L the Best Diesel Ever Built?
Early 5.9L Engine History Weighing in at 1,100 pounds this heavyweight was brought to market under the hood of the Dodge Ram in 1989. It was originally designed to power agricultural vehicles 8 years earlier and in fact was the brainchild of a Case/Cummins joint venture. The engine marketed as the 6B, 6BT, and 6BTAA…
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Best 4BT Swap Transmisson Review: New Venture NV4500

Best 4BT Swap Transmisson Review: New Venture NV4500
NV4500 History The NV4500 and consequently the NV5600 transmissions are some of the best that have ever been produced for heavy duty trucks. These transmissions are regarded as the “gold standard” for guys doing a Jeep or Bronco 4BT Engine Swap. The NV4500 came into existence out of sheer necessity. From 1989-1993 Chrysler used the…
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