Dodge Cummins Diesel Forum - View Single Post - Whats the story on #4 injector line cracking due to loose support clamp?
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post #2 of (permalink) Old 05-21-2019, 02:38 PM
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I found the same and did the same as you. But I then ordered Cummins #4 updated fuel line and replaced mine. Convenience/insurance for $40. These lines could break for any number of reasons: metal or insulation inconsistencies, tube design, supplier location....most things have a lifecycle anyway. The lines have tails of fuel at 5-20k+ psi flowing thru them, so that has an effect I think.

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