Tech Tip Of The Month- Cummins QSB 3.3 Overhaul Gasket Kit

Every month, we will share helpful information and/or tech tips so that you can diagnose and repair your engine to get you back to work.

This tech tip revolves around a Cummins QSB 3.3 4-Valve Engine and how to know when it is time to upgrade to our Overhaul Gasket Kit that covers a complete overhaul! 

Cummins QSB 3.3 4-Valve Overhaul Gasket Kit 4309433

A couple of indicators include

  • Smoke coming from the engine
  • Power Loss
  • Overheating Problems
  • Misfire on a cylinder


If you believe you have an engine issue then Commercial Diesel has the answer for you with our Overhaul Gasket Kit for a great price of $600


The contents of this kit include:

  • Flywheel Drain Plug Washer
  • Banjo Bolt Washers
  • Oil Pump O-Ring
  • Banjo Bolt Washers 10mm
  • Banjo Bolt Washers M14
  • Intake Connection O-Ring
  • Banjo Bolt Washers M12
  • Front Accessory Plate O-Ring
  • Turbo Drain Tube Gasket
  • EGR Valve Outlet Gasket
  • EGR Water Pipe O-Ring
  • Turbo Gasket
  • Rocket Box Gasket
  • Valve Cover Gasket
  • Water Pump Gasket
  • Valve Stem Seal
  • Head Gasket
  • Thermostat Gasket
  • EGR Water Pipe Gasket
  • EGR Pipe Gasket
  • Injector Supply O-Ring
  • Fuel Pump O-Ring
  • Water Pump O-Ring
  • Front Main Seal
  • Water Pump O-Ring
  • Water Pump O-Ring
  • EGR Valve Inlet Gasket
  • Front Cover Gasket
  • Exhaust Manifold Gasket
  • EGR Pipe Gasket
  • Injector O-Rings
  • Rear Main Seal
  • Gasket, Oil Drain
  • Seal, O-Ring
  • Seal, O-Ring
  • Gasket, Flywheel Housing
  • Gasket, Connection


To contact us about purchasing this kit or to handle equipment diagnosis and repair or to purchase from our wide variety of parts. Email us at or give us a call at 830-372-1594 and we will be happy to get you back to work!


Let’s make it happen!