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How To Test and Service Your Cummins Injectors

By Featured Writer: Mike McGlothlin Despite how durable the mechanical fuel injectors are in the ’89-’02 5.9L Cummins engines, they’re still a wear item. That means that even though this ultra-simple, single-shot injectors are known to last 400,000 miles or more, eventually they’ll need to be serviced. Whether the owner notices a change in performance,…
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Compression Testing A Cummins Engine

By Featured Writer: Mike McGlothlin On any internal combustion engine, compression is what makes the world go ‘round. For diesel engines, where compression is often at least double what you see in a typical gasoline engine, it means everything. Not surprisingly, being down on compression means you’re down on power—and that can’t happen when you’ve…
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Understanding Blow-By

By Featured Writer: Mike McGlothlin Blow-by is a term that tends to worry the average internal combustion engine owner. It’s the result of combustion pressure and gases leaking into an engine’s crankcase—and it is often associated with engine failure. However, it may surprise many to learn that every engine produces some amount of blow-by. And…
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