Caterpillar 3126 & C7

Reviva’s 6 Cylinder Caterpillar diesel engines are available for many class 6-8 truck, bus, vocational, and industrial applications.  

Reviva’s long block engines are available for years 1994 and up for the 3126 and C7 families.  Reviva's engines are custom configured to the vehicle and in most cases will ship within 2 business days.

All Reviva engines are assembled in the USA.  

Product Bulletin


To determine correct part number and configurations available, please gather the following information from the engine data tag on the valve cover:

  • Engine Serial Number (Format 7AS or WAX...)
  • Engine Arrangement Number (Format 108-5291)
  • Engine Model Year
  • Vehicle: Year, Make, and Model

Long Block

  • Block
  • Rods
  • Piston Assemblies
  • Camshaft

 Long Block Supreme
parts on long block plus:

  • Injectors
  • Crankshaft
  • Valve Train
  • Cylinder Head
  • Gear Housing
  • Front Seal
  • Oil Cooler
  • Gasket Set
  • Oil Pump

Complete Drop-In
parts on long supreme plus:

  • Intake Manifold
  • Front Cover
  • Damper
  • Exhaust Manifolds
  • Injection Pump
  • Fuel Lines
  • Valve Cover
  • Oil Pan
  • Water Pump & Pulley
  • Turbocharger
  • Fuel Transfer Pump

Electronic Complete Engines
also include:

  • Injection Pressure Sensor
  • Boost Pressure Sensor
  • Engine Timing
  • Speed Sensor
  • Air Pressure Sensor
  • Oil Pressure Sensor
  • Atmospheric Sensor
  • Coolant Temp Sensor

Dynomometer Testing

All of Reviva’s 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.

Warranty Coverage

On-Road Complete Drop-In configurations: 2yr/unlimited mileage.
**2nd year long block coverage only.
Off-Road Long Block or Complete Drop-In configurations: 1yr/2,000 hours.
Long Block configuration: 1yr/Unlimited miles. Transit applications: 1 year.

Some restrictions apply; see limited warranty details or call 877-357-7634 for more information.