The 6.7 Powerstroke CCV reroute is a common topic among diesel owners seeking improved engine cleanliness, reliability, and long-term performance. Central to this discussion is the Powerstroke crankcase ventilation system, which manages internal pressure and vapors. However, many owners eventually encounter issues such as oil in the intake, reduced efficiency, or excessive residue buildup.
Understanding how the 6.7 Powerstroke CCV system works—and why modifying it can be beneficial—explains why rerouting crankcase vapors has become a popular consideration for drivers who demand more from their engines.
What is a 6.7 Powerstroke CCV Reroute?
A CCV reroute is a modification that changes how crankcase vapors are handled before they reach the engine’s intake system. Instead of allowing oil mist and blow-by gases to recirculate into the intake, these vapors are redirected away from sensitive airflow components.
This redirection is the foundation of the modification—and the primary difference from the factory system.
Understanding the Factory Crankcase Ventilation System
To understand why a CCV reroute is beneficial, it helps to first understand the factory system. From the factory, the crankcase ventilation system is designed as a closed-loop setup.
Its job is to relieve internal pressure caused by combustion gases that slip past the piston rings—commonly known as blow-by. These gases carry fine oil vapor, which is routed back into the intake stream to be reburned. While this design meets emissions requirements, it introduces oil residue into components meant to stay clean.
This closed-loop design means that oil-laden vapors mix with incoming air. Over time, this coats intake piping, sensors, and intercooler surfaces. The result is restricted airflow, reduced heat transfer efficiency, and increased risk of oil pooling—conditions that can quietly reduce performance without triggering immediate warning signs.
Why Your 6.7 Powerstroke Needs a CCV Reroute
The decision to install a CCV reroute is rarely about aesthetics alone. It is typically driven by early signs of contamination or performance inconsistency.
Preventing Oil Sludge in the Turbocharger and Intercooler
Oil sludge inside the turbocharger and intercooler is one of the most common complaints associated with intake contamination. When oil vapor mixes with soot and moisture, it forms a sticky residue that clings to internal surfaces.
A CCV reroute significantly reduces the amount of oil entering these components, allowing them to operate more efficiently with less maintenance over time.
Stopping “Boot Soak” and Boost Leaks Before They Happen
By redirecting crankcase vapors away from the intake, a CCV reroute minimizes the risk of boot soak—oil accumulation inside charge air boots and couplers. As oil builds up, rubber components can swell or soften, increasing the likelihood of boost leaks.
These leaks reduce power delivery and cause inconsistent throttle response. Preventing oil contamination at the source helps preserve and boost integrity over the long term.
Improving Overall Combustion Efficiency and Lowering EGTs
Cleaner intake air contributes to more stable combustion. When oil mist is removed from the airflow, the air-fuel mixture becomes more predictable.
This can result in smoother power delivery and potentially lower exhaust gas temperatures (EGTs)—a key reason many owners choose a CCV reroute setup on a 6.7 Powerstroke.
Choosing the Best 6.7 Powerstroke CCV Reroute Kit
Selecting the right CCV reroute kit requires an understanding of available design options and material quality.
Comparison: Open Vent vs. Closed Catch Can Systems
Open vent systems route vapors directly to the atmosphere, typically through a small breather filter. They are simple, effective, and low-maintenance. However, they vent unburned hydrocarbons into the engine bay, which may not be street-legal in all regions and can produce visible vapor or fuel odor.
Closed catch can systems route vapors through a sealed reservoir that separates and traps oil. Cleaned air is then either vented or returned to the intake. These systems offer cleaner operation and collect residue in a serviceable container, but require periodic draining.
The choice depends on local regulations, driving conditions, and personal preference.
Material Quality: Why Billet Aluminum Beats Plastic Adapters
Material durability is critical in an engine bay exposed to heat and vibration. Factory CCV components and many low-cost adapters are molded from plastic, which can become brittle over time due to thermal cycling and oil exposure. Cracking or warping at the sealing surface can lead to vacuum leaks or oil seepage.
Billet aluminum components offer superior resistance to cracking, warping, and long-term degradation. They maintain proper sealing and consistent performance far longer than plastic alternatives.
Key Components to Look for in a Premium Kit
A premium CCV reroute kit should include:
- Billet aluminum adapter with integrated O-ring or gasket seal
- Oil-rated hose (SAE J30R14 or equivalent)
- Stainless steel worm-gear or spring-style clamps
- Optional catch can with sight tube and drain valve
- Threaded or push-lock fittings for positive retention
Ease of installation and serviceability are also important, particularly for owners who perform their own maintenance.
Step-by-Step 6.7 Powerstroke CCV Reroute Installation Overview
Follow these steps for 6.7 Powerstroke CCV reroute installation:
- Locate the factory CCV outlet on the valve cover or breather assembly.
- Disconnect the stock hose from the CCV outlet and the intake inlet, then remove it.
- Install the billet adapter onto the CCV outlet using the supplied O-ring or gasket.
- If using a catch can, mount it in an accessible location away from heat and moving components.
- Route the new hose from the adapter to the catch can (or directly to atmosphere), avoiding low points and hot surfaces.
- Secure all connections with clamps and verify clearance.
- Cap or filter the intake inlet fitting.
Once installed, periodic inspection helps ensure the system remains secure and effective.
Conclusion: Is a CCV Reroute for the 6.7 Powerstroke Worth It?
For most 6.7 Powerstroke owners, a CCV reroute is a worthwhile investment. It addresses common issues related to oil contamination, airflow restriction, and long-term component wear.
By keeping the intake system cleaner and reducing oil-related problems, this modification supports consistent performance and extended engine life.
It is especially beneficial for trucks used in heavy towing, high-performance tuning, or high-mileage operation. It is not, however, a fix for excessive blow-by caused by worn internal components.
When combined with regular maintenance and high-performance parts for the 6.7 Powerstroke, a CCV reroute is a practical, low-maintenance way to improve reliability and efficiency.
