Prosource Diesel

  Introduction to the CP4 Pump Modern diesel engines demand precise fuel delivery at extremely high pressures to meet performance and emissions standards. To achieve this, manufacturers adopted compact high-pressure fuel systems capable of supplying common rail injectors with consistent flow. Among these systems, the CP4 series became widely used across light- and medium-duty diesel platforms. While efficient and capable, it has also gained attention due to reliability concerns, making it a frequent topic among truck owners, technicians, and fleet managers. Understanding how this pump operates, why issues occur, and what solutions exist helps owners make informed maintenance and upgrade decisions. How the CP4 Pump Works The  CP4 pump  is a high-pressure injection pump driven mechanically by the engine. Its role is to draw low-pressure fuel from the tank, compress it to extremely high pressure, and deliver it to the common rail feeding the injectors. Internal cam lobes and...

  The 5.9L Cummins 24-valve engine has earned legendary status among diesel enthusiasts for its durability, tuning potential, and real-world performance. One of the biggest factors that determines how this engine delivers power—and how long it lasts—is the turbocharger. Choosing the right turbo is not just about peak horsepower; it’s about balanced airflow, controlled exhaust gas temperatures, and long-term reliability. A well-matched turbo upgrade can transform throttle response, towing capability, and daily drivability without compromising engine life. This article breaks down how a modern turbo upgrade impacts power output and reliability on a 5.9 Cummins 24-valve, focusing on design, boost control, and performance characteristics. 5.9 Cummins Turbo Overview The factory  turbo on the 5.9 Cummins 24-valve  was designed to meet emissions and durability standards rather than maximize airflow. While reliable, stock units often become restrictive once fueling is increased. ...

  Intro: Turbo Upgrade Debate The 6.0 Powerstroke community has always been divided on one question— should you stick with the factory turbo or move to a larger upgraded unit?  While the stock charger is capable of respectable power and drivability, many owners chase stronger towing performance, better throttle response, and higher horsepower. But bigger doesn’t always mean better, and choosing the wrong setup can hurt reliability or drivability. Understanding where turbo upgrades truly shine helps you make the right decision for your build. Stock Turbo Specs Overview From the factory, the 6.0 Powerstroke uses a variable-geometry Garrett GT3782VA turbocharger. This unit is engineered to balance spool, boost control, and towing performance. It’s often referenced for its  6.0 Powerstroke stock turbo size m m , and while it’s not the largest on the market, it delivers dependable airflow for work-duty applications. Many owners refer to the  6.0 Powerstroke turbo size ...

Introduction to LML Head Gaskets The 2011–2016 LML Duramax engine is known for its reliability, power, and towing capability. However, like any high-compression diesel, it can face head gasket issues over time—especially under heavy loads, high mileage, or tuning. When the  lml head gasket  fails, the engine begins to show several warning signs that shouldn’t be ignored. Detecting these symptoms early can prevent expensive engine damage and help owners plan timely repairs. Understanding how these signs show up in real driving conditions is essential for anyone who owns, services, or works on an LML Duramax. Blown head gaskets rarely fail instantly. Instead, they typically worsen gradually, starting with overheating, subtle coolant loss, or unusually pressurized hoses. This guide breaks down the key symptoms you should look for so you can diagnose problems before they escalate into major engine repairs. Overheating Issues One of the earliest and most common signs of LML Duramax...