Cummins 3.9L/4B Diesel Engine
The 3.9L/4B Cummins is a popular engine used in step van applications including bread, snack, uniform, and other commercial delivery vehicles. This engine is also used in various industrial and construction applications.
Reviva utilizes torque plating methods for boring and honing to ensure block straightness, which reduces break-in time and crankcase pressure. In addition, Reviva uses OEM or equivalent pistons, rings, bearings, valves, and gaskets, making sure that this engine will stand the test of time.
All Reviva engines are assembled in the USA.
LONG BLOCK INCLUDES:
- Crank gear
- Piston assemblies
- Rear covers & seal
- Oil filter assembly
- Side cover/crankcase breather
- Valve train (lifters, pushrods, & rocker arms)
- Water pump
- Oil pump
- Cam gear
- Front gear housing
- Oil cooler
- Valve cover(s)
- Gasket set
COMPLETE DROP-IN INCLUDES:
ALL PARTS ON THE LONG BLOCK PLUS:
- Lift pump
- Low & high pressure lines
- Fuel filter assembly
- Turbocharger (If Applicable)
- Intake cover & connection
- Thermostat housing
- Air crossover tube if required
- Oil pickup tube
- Injection pump
- Damper pulley
- Exhaust manifold
- Oil pan
- Gear cover & seal
TO PLACE AN ORDER
Before calling to request price and availability, please gather the following information:
- The original engine serial number
- The original engine CPL number
Every engine is machined using state-of-the-art equipment and assembled using precise and repeatable methods. All engine production follows documented lean manufacturing processes and principles to create consistent quality and dependable outcomes.
Reviva’s Short Block, Long Block, and Long Block Supreme are 100% Sim tested before shipment.
Reviva’s Complete Drop-In engines are 100% dyno tested before 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.
On-Road Complete Drop-In configurations: 2 year/unlimited mileage, 2nd-year long block coverage only.
Long Block configurations: 1 year/unlimited mileage.
Off-Road All configurations: 1 year/2,000 hours.
Some restrictions apply; see limited warranty details or call for more information.
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Reviva is an independent manufacturer and is not affiliated with Navistar, Ford, Cummins, General Motors, or Caterpillar.