Cummins 4B Engine

Cummins 4B Drop-In Engine CPL 594

SKU: 863 Categories: , ,

Product Description

Cummins 4B Engine CPL 594
The 4B/3.9L Cummins is a popular engine used in step van applications including bread, snack, uniform, and other commercial delivery vehi-cles. This engine is also used in various industrial and construction applications. Diesel Experts utilizes torque plating methods for boring and honing to ensure block straightness, which reduces break-in time and crankcase pressure. In addition, Diesel Experts uses OEM or equivalent pistons, rings, bearings, valves and gaskets, making sure that this engine will stand the test of time.

Dynamometer Testing
All of the Complete Drop-In engines are 100% dyno tested prior to shipment. Computer controls ensure that each engine dyno test is conducted under standard, repeatable settings. Every engine is run through a warm
up cycle; three separate cruise segments simulating light, medium and heavy throttle conditions; maximum torque and horsepower tests; both high and low idle tests; and a black light leak detection test with dyed oil, coolant and fuel.

Cummins 4BT Drop-In Engines Include:

Cylinder Block Crankshaft Crank Gear Piston Assemblies Cylinder Head Rear Cover & Seal Oil Filter Assembly Water Pump
Lift Pump Low & High Pressure Lines Fuel Filter Assembly TurboCharger Intake Cover & Connections Thermostat Housing Oil Pickup Tube Lift Pump
Oil Pump Cam Gear Camshaft Front Gear Housing Oil Cooler Valve Cover Gasket Set Injection Pump
Injectors Damper Pulley Thermostat Exhaust Manifold Oil Pan Gear Cover & Seal Air Crossover Tube Valve Train (lifters, pushrods & rocker arms)
Side Cover / Crankcase Breather


Additional Information

Weight 850 lbs
Dimensions 48 x 48 x 40 in






Engine Size



Naturally Aspirated


1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996

Exhaust Type

NA (Not Applicable)

Injection System Type

Lucas CAV Rotary Pump

Oil Pan Sump Location

Rear Sump


76 HP


On Road Use

2 Year Parts & Labor Warranty on Engine / 1 Year on Fuel System and Turbo Components

Off Road Use

1 Year Parts & Labor Warranty on Engine, Fuel System and Turbo Components


Drop-in Engine Includes:

Block Crankshaft
Rods                                                  Oil pump
Crank gear                                        Cam gear
Piston assemblies                            Camshaft
Head                                                  Front gear housing
Rear cover & seal                             Oil cooler
Oil filter assembly                             Valve cover(s)
Water pump                                      Gasket set
Lift pump                                           Injection pump
Low & high pressure lines               Injectors
Fuel filter assembly                           Damper pulley
Turbocharger                                     Thermostat
Intake cover & connection               Exhaust manifold
Thermostat housing                         Oil pan
Oil pickup tube                                  Gear cover & seal
Air crossover tube if required
Side cover/crankcase breather
Valve train (lifters, pushrods & rocker arms)

To Place and Order

Before calling to request price and availability, please
gather the following information:
The original engine serial number
The original engine CPL number
The CPL and serial numbers are located on the injection
pump side of the engine on the front gear cover.


Shipping is included round trip to a business address in the lower 48 States.
Residential shipping, Canada and Alaska shipping is available at an additional Cost