![]() ![]() From left to right, you can see every make and model injector the common-rail experts at S&S Diesel Motorsport specialize in: BMW M57 (piezo), 6.4L Power Stroke (piezo), ’11-’19 6.7L Power Stroke (piezo), ’20 6.7L Power Stroke (piezo), LB7 Duramax SAC00 (solenoid), LLY Duramax (solenoid), LBZ Duramax (solenoid), LMM Duramax (solenoid), LML Duramax (piezo), L5P Duramax (solenoid), early 5.9L Cummins (solenoid), late 5.9L Cummins (solenoid), ’07.5-’18 6.7L Cummins (solenoid), and ’19-present 6.7L Cummins (solenoid). High-pressure common-rail injectors are almost single-handedly responsible for keeping the diesel engine alive in today’s stringent-emissions world. From nozzle modifications to internal body work, to spelling out the difference between solenoid and piezo injectors, to helping us understand a flow data sheet, this is what they had to say. But how do you know exactly what you’re getting when you buy aftermarket injectors? To answer that question, we consulted some of the biggest names in the diesel industry: Dynomite Diesel Products, Exergy Performance, RCD Performance, and S&S Diesel Motorsport. ![]() From 15-percent over stock to 500-percent over stock and beyond, there is an injector for everyone’s needs. Today, common-rail dominates the landscape-be it on the street, the dyno, or the track-so it stands to reason why so many aftermarket companies are building larger injectors for them. Then it was time to find out what a modified common-rail injector could do, which consequently opened up a whole new world. Through ECM tuning alone, another 200-250 hp could be added to a truck’s bottom line, thanks in large part to the factory injectors and high-pressure fuel pump being capable of supporting it. ![]() But once the aftermarket got ahold of electronically-controlled high-pressure common-rail, its true untapped potential was realized. When Cummins hopped on the common-rail bandwagon in 2003, the result was the quietest, cleanest-burning, and most powerful 5.9L it had ever produced. Ultra-high injection pressure, solenoid-style, multiple-event injectors, and full electronic control over the system brought the most refined diesel performance we’d ever seen to the table-along with quieter, cleaner engine operation. When high-pressure common-rail debuted on the LB7 Duramax back in 2001, it changed the way we look at diesels. How many injectors does a 6.The Past, Present, and Future of Diesel Performance The good news is the replacement injectors you purchase from us incorporate several updates to help prevent repeat failures. The LB7 Duramax built from 2001 – 2004.5 is known for injector failure. The total cost to have a mechanic replace 8 injectors on an LB7 Duramax can range from $4000 – $5000 CAD, depending on what other work is performed at the same time. How much does it cost to replace injectors on LB7? The process changes from model year to model year and is complex enough that we recommend purchasing a service manual if you are attempting this job yourself. Poor quality fuel will cause premature injector failure. LB7 injectors using Bosch common rail technology operate at very high pressure. Another common failure is body leakage, which adds diesel fuel to the engine oil, causing the level to rise. Typical LB7 injector failure is dripping at the nozzle, causing white exhaust smoke, especially noticeable at idle. What are some other common 6.6L Duramax LB7 problems?Ĭommon problems found on the Duramax 6.6L LB7 engine are white smoke at idle, hazy exhaust smoke under light load, and engine oil levels increasing due to fuel contamination. When you’re ready visit our Canadian diesel parts shop to purchase a new fuel pump. How to replace Duramax fuel injectors and how much it’s going to cost. Learn how to know when an LB7 injector is going bad. Duramax LB7 injectors are the number one fuel injector pumps we get questions about. ![]()
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