Cummins NT855 Engine Parts for Canada - Turbo Section

Turbocharger & Air System Components for Cummins NT855

The Cummins NT855 engine is a robust workhorse used across marine, industrial, construction, and power generation applications. A key component in maintaining its high-performance capabilities is the turbocharger and associated air system parts. Whether you're replacing a worn-out turbo or upgrading components in your intake and exhaust systems, Diesel Pro Power offers a complete lineup of compatible parts designed for long-lasting performance and easy installation.

Explore the turbo and air system parts catalog for the NT855 below, including new turbochargers, aftercooler gasket kits, Airsep filtration systems, jointing compounds, and specialized hoses for a complete and reliable boost system.

Complete Turbocharger for Cummins NT855 Engines

Our replacement turbochargers for Cummins NT855 engines are precision-balanced, high-performance units engineered for engines with specific CPL configurations. These turbos help ensure optimal airflow, pressure ratios, and exhaust gas efficiency—key for maintaining power output, fuel economy, and emissions compliance in high-load environments.

Features:

• Direct replacement for factory NT855 turbos

• Built for engines with designated CPL compatibility

• Brand-new unit (not remanufactured)

• Balanced for vibration-free performance

• Compatible with marine and industrial engine variants

If you're experiencing loss of power, increased smoke, poor fuel economy, or unusual turbine noises, it may be time for a complete turbocharger replacement. Diesel Pro Power provides drop-in units that match Cummins specifications for the NT855 engine series.

Airsep System for Cummins NH855 and NT855 Engines

The Airsep system is a critical component of crankcase ventilation and intake air filtering. Designed for the NT855’s high-horsepower diesel configuration, this system helps reduce oil mist discharge and enhances overall air quality entering the turbocharger.

System Features:

• Designed specifically for NH855 and NT855 engines

• 6" throat diameter for optimal airflow

• Durable filtration media captures oil vapors and particulates

• Improves emissions performance and engine cleanliness

• Ideal for marine engines operating in closed or semi-closed environments

In marine applications, crankcase emissions can pose challenges. The Airsep system helps eliminate oil mist contamination in the engine compartment and reduces the environmental impact of the NT855 powerplant.

Aftercooler Gasket Kit for NT855 Engines

Maintaining proper seal integrity in the aftercooler is crucial for ensuring consistent boost pressure and intake air temperature. Diesel Pro Power’s aftercooler gasket kit for the NT855 includes high-temperature gaskets designed to prevent pressure leakage and heat soak from the cooler to surrounding components.

Key Benefits:

• Complete gasket set for NT855 aftercooler service

• High-temp rated materials resist cracking and blowout

• Helps maintain consistent charge air cooling

• Improves turbocharging efficiency and engine reliability

Routine inspection and gasket replacement during aftercooler servicing can prevent boost leaks and power loss, especially in demanding marine and generator applications where uptime is critical.

High-Temperature Turbo Jointing Compound

Turbo systems on high-performance diesel engines like the Cummins NT855 operate under extreme heat and pressure. Diesel Pro Power offers a professional-grade jointing compound suitable for sealing turbo flanges and high-temp joints across both Cummins and Detroit Diesel engines.

Product Specifications:

• Thermal tolerance from 550°C to 760°C

• Ideal for sealing turbo-to-manifold and turbo outlet joints

• Resists thermal cycling and vibration

• Professional-grade 225 gm tube format

This jointing compound is an excellent choice for technicians seeking added insurance against exhaust leaks in high-performance or heavy-duty operating conditions. Perfect for marine engine rebuilds, stationary gensets, or industrial machinery installations.

Turbo Hump Hoses for NT855 Turbo Connections

Secure and flexible hose connections are essential for maintaining airflow in the turbo and aftercooler system. Diesel Pro Power offers two durable hump hoses that connect turbocharger outlets or aftercooler inlets with reduced diameters, ensuring compatibility across different turbo piping setups.

Hump Hose: 6" to 5" Diameter Reduction

• Designed for adapting 6” turbo outlets to 5” piping

• Flexible silicone construction for vibration absorption

• Resists high temperatures and oil exposure

• Commonly used in marine turbocharger setups

Hump Hose: 6" to 5.5" Diameter Reduction

• For installations requiring 5.5” piping connection

• High-temp rated and reinforced construction

• Smooth internal bore reduces turbulence and pressure drop

These hump hoses are often used in retrofit or replacement turbo installs where exhaust or intake piping diameters vary slightly between models or aftermarket components. Their high flexibility and resilience make them ideal for NT855 engines operating in dynamic marine or generator environments.

Troubleshooting Turbocharger Problems on Cummins NT855 Engines

If your NT855 engine is showing signs of performance decline, here are key symptoms to look for that may point to turbo or air system issues:

• Excessive black smoke: May indicate insufficient air from a failed or failing turbocharger.

• Loss of power: Turbo lag or total failure can prevent the engine from reaching rated output.

• High exhaust temperatures: A restricted or leaking air system can lead to increased EGTs.

• Oil leaking from the turbo: Damaged seals or excessive crankcase pressure from a failing Airsep system.

• Whistling or screeching sounds: Likely caused by bearing failure or compressor housing damage.

Routine inspections of the turbocharger, air filters, aftercooler connections, and crankcase ventilation system are vital to preventing long-term engine damage.

Importance of Turbocharger Health for NT855 Engine Longevity

The NT855 turbo system plays a vital role in ensuring optimal air-fuel ratio, cooling the charge air through the aftercooler, and maintaining proper cylinder pressure for clean combustion. A degraded turbocharger can cause a cascade of issues across the engine, including:

• Poor combustion efficiency

• Elevated cylinder temperatures

• Increased wear on pistons and valves

• Higher fuel consumption

• Engine derating or automatic shutdown in controlled systems

Replacing the turbo and maintaining related air system components can restore lost performance and protect your investment in the Cummins NT855 platform, especially in critical-use applications like marine propulsion or generator sets.

Installation Notes for NT855 Turbo Components

When installing or servicing NT855 turbo and air system components, keep these best practices in mind:

• Always replace gaskets during turbo or aftercooler removal.

• Clean all mating surfaces thoroughly to ensure proper sealing.

• Use torque specs from the NT855 service manual to avoid overtightening.

• Prime the turbo with engine oil before startup to protect bearings.

• Check for carbon buildup inside exhaust and intake manifolds.

• Inspect hoses for dry-rot or cracking—replace as needed with high-quality silicone replacements.

• Confirm Airsep system is clear of clogs or excessive oil saturation to prevent crankcase pressure buildup.

Applications: Where the NT855 Turbo System Matters Most

Turbo system performance is especially critical in NT855-powered equipment found in:

• Marine propulsion systems

• Standby and continuous-duty generators

• Industrial pumps and compressors

• Heavy equipment such as excavators, loaders, and cranes

• Oilfield service rigs

In all these settings, the turbocharger is essential not just for performance but for fuel efficiency and emissions control. Diesel Pro Power’s inventory is tailored to meet the needs of operators in these demanding industries.

Why Buy NT855 Turbo Components from Diesel Pro Power?

With over 40,000 satisfied customers worldwide, Diesel Pro Power is the trusted source for Cummins NT855 turbochargers and air system parts. Our benefits include:

• Parts in stock and ready to ship

• Expert support for CPL matching and application fitment

• Components tested to meet or exceed OEM quality standards

• Fast, worldwide shipping and support in both English and Spanish

• Easy online ordering and responsive customer service

Don’t take chances with your NT855’s performance—choose Diesel Pro Power for turbo parts that are built to last and supported by professionals who understand Cummins engines inside and out.