The Cummins B Series engine is a popular engine. It has been widely used in automotive, industrial and marine applications. Cummins B Series as used in automotive applications are found in Dodge trucks as well as some specialized chassis. Cummins B Series as used in industrial applications are found in many wood chippers, Hyster rollers and fork lifts, etc. Most mechanics that work on the Cummins B Series have experience working on the Cummins B Series in Dodge pickups and generalize from that. This can lead to problems.
When installing new or remanufactured Cummins B Series fuel injectors, some people assume that the injector protrusion spec is the same for all applications and just set them for the same spec as used in automotive B Series. This is a common error and can lead to problems because the protrusion is different for the Cummins B series industrial engine.
To help you set the fuel injector protrusion on the Cummins industrial B Series, please take a look below.
Injector Protrusion for the Cummins B Series Industrial Engine
(Note: automotive and marine are different)
If you need to adjust the protrusion on your B Series we have injector seals in different dimensions. However, there is a slight difference between the nominal size of the seal and its actual thickness.
The chart below lists the actual seal thickness for three different B Series Injector Seals.
1.40 – 1.68
.055” – .066”
2.40 – 2.68
.095” – 1.06”
2.90 – 3.16
1.14” – 1.25”
We hope that this Tech Tip has been helpful. Foley Engines stocks over 20,000 square feet of engine parts kits for Cummins B Series engines. Please call us at 800.233.6539 or email Dr. Diesel™ at DrDiesel@FoleyEngines.com with any questions to order an engine kit or a Workshop Manual.