Cummins QSB 5.9 Parts +

When you need Cummins QSB5.9 parts, you need a dependable, reliable partner you can trust. Diesel Pro Power is here for you. We offer knowledgeable staff, an easy-to-use website and some of the lowest prices around. If you have any questions about ordering parts, feel free to contact us right away, or use the following specifications to help diagnose engine problems, or if you simply want more information about your engine.



What is the displacement, bore and stroke on a QSB5.9?

The engine has a displacement of 5.9 liters of 359 square inches. The bore is 4.02 inches and the stroke is 4.72 inches.


What are the exhaust system specifications for a Cummins QSB5.9?

The maximum allowable back pressure is 17 kPa / 5 in Hg.
The maximum bending moment at turbine outlet mounting flange is 12 NM / 9 ft•lb.


What are the exhaust system specifications for a Cummins QSB5.9?

The maximum allowable back pressure is 17 kPa / 5 in Hg.
The maximum bending moment at turbine outlet mounting flange is 12 NM / 9 ft•lb.


I need parts for my air intake. What are the air intake specifications?

Checking the restriction is a good diagnostic tool to use. The maxiumum allowable intake restriction for turbo engines is 15 in H2O with a clean filter or 25 in H2O with a dirty filter.


How hot can the air that enters the air cleaner be?

The maximum air cleaner inlet temperature rise (over the ambient air) is 30 F or 17 C.


What are the fuel system specs for a Cummins QSB5.9?

If you need to buy parts for the fuel system, make sure to check any restrictions to help diagnose any problems.
The maximum allowable restriction to the fuel pump is 8 kPa / 2.5 in Hg with a clean filter or 14 kPa / 4.0 in Hg with a dirty filter.
The maximum allowable return line pressure is 34 kPa / 10 in Hg.
The maxium static pressure a the fuel pump is also 34 kPa / 10 in Hg.
The maximum height of fuel in tank above fuel pump 4.12 m / 13.5 feet.


What are the important specs for engine mounting?

The maxium allowable bending movement (at the rear of the block) is 1356 N•m or 100 ft•lb. The maximum allowable axial thrust load is 400 ft•lb. The minimum axial clearance at the front face of the crankshaft – for thermal expansion, is .050 inches.


What are the maximum engine installation angles on the Cummins QSB5.9?

Engine front up from horizontal for inline drive the minimum is 0 degrees and the maximum is 12 degrees. For Vee Drive, the minimum is 2 degrees and the maximum is 12 degrees.


What are the engine angles for vessel operation?

Making sure the engine maintains the proper angle can help avoid the need for replacement parts later on. For steady state operations, the engine pitch angle (front up from horizontal) has a minimum of -15 degrees and a maximum of 25 degrees. For all drives, intermittent operation, the engine role angle (right/left, viewed from flywheel of engine) has a maximum right of 35 degrees and a maximum left of 35 degrees.

For all drives, with intermittent operation, the engine pitch angle (front up from horizontal) has a minimum of -30 degrees and a maximum of 45 degrees.

What does a fault code 449 or 2216 mean in a Cummins QSB5.9?

The ECM has detected that fuel pressure in the rail fuel is higher than the commanded pressure.

Check for any restrictions, especially in the return line. Also check the sensor to make sure it is functioning normally as well as related parts.