NT855 Air Crossover Tube 211657 for 139 Cylinder Diameter K38 Diesel Engine Parts

Product Details

Product Overview

This heavy-duty Air Crossover Tube (Part Number: 211657) is a critical component designed for the NT855 and K38 series diesel engines. Specifically engineered to accommodate a 139mm cylinder diameter, this tube ensures optimal airflow distribution between cylinder heads, maintaining balanced combustion and peak engine performance. As a genuine (Chongqing Engine Company) sourced component, it meets the stringent quality standards required for industrial, marine, and power generation applications.

Manufactured in Chongqing, China—the global hub for engine production—this part is an exact replacement for the original equipment. Whether you are servicing a generator set, marine propulsion system, or heavy-duty truck, this air crossover tube provides the precise fit and reliable operation your engine demands.

Key Features & Benefits

• Genuine OEM Quality: Manufactured to original specifications, ensuring 100% interchangeability with the factory-installed part.
• Precision Fit for 139mm Cylinder Bore: Specifically machined for K38 and NT855 engines with a 139mm cylinder diameter, eliminating installation guesswork.
• Durable Construction: Made from high-grade cast iron or steel alloy to withstand extreme temperatures, vibration, and pressure differentials in diesel engines.
• Enhanced Airflow Efficiency: Optimized internal diameter reduces turbulence and pressure drop, supporting consistent air delivery to all cylinders.
• One-Year Warranty: Backed by a minimum one-year warranty against manufacturing defects, providing peace of mind for fleet operators and equipment dealers.
• Versatile Application: Compatible with generator sets, marine engines, and truck applications, making it a universal solution for K-series rebuilds.

Technical Specifications

OEM Cross-Reference

This air crossover tube is a direct replacement for the following OEM numbers:

• Part Number: 211657
• Part Number: 211657
• Cross-Reference: 205-1657 (KW equivalent), 185-2220 (Horsepower variant)

Note: Always verify your engine’s serial number and current part number to ensure compatibility. This part is designed for engines using a 139mm cylinder diameter configuration.

Compatibility

This air crossover tube is commonly used for the following applications:

• Engine Models: K38, NT855
• Equipment Types: Generator sets, marine propulsion systems, heavy-duty trucks
• Power Range: 205-1657 kW / 185-2220 HP
• Industry Use: Power generation, shipping, on-highway trucking, industrial machinery

Fitment Note: This part is specifically listed for engines with a 139mm cylinder bore diameter. It is not compatible with standard 140mm or 152mm bore engines without modification.

Global Supply & Distribution

We provide worldwide shipping from our central warehouse in Chongqing, China, with established logistics networks serving all major international markets:

• North America: Express delivery to ports in Los Angeles, Houston, New York, and Vancouver.
• Europe: Fast transit to Rotterdam, Hamburg, Antwerp, and Felixstowe.
• Asia-Pacific: Regional distribution to Singapore, Dubai, Sydney, and Shanghai.
• Middle East & Africa: Direct shipping to Jebel Ali, Dammam, and Durban.

Our export team ensures full compliance with international trade regulations, including customs documentation and certificate of origin. Bulk orders are consolidated for cost-effective freight, and smaller shipments are handled via express couriers (DHL, FedEx, UPS) for urgent needs.

Quality Assurance

• Manufacturing Standards: Produced in ISO 9001:2015 certified facilities in Chongqing, China.
• Material Certification: Raw materials are traceable to approved mills, with certificates available upon request.
• Inspection: Each unit undergoes dimensional and pressure testing before packing. Video inspection can be provided for pre-shipment verification.
• Warranty: We offer a minimum one-year warranty against manufacturing defects, with fast replacement or refund processing for any quality issues.

FAQ

Q1: Will this air crossover tube fit my K38 engine with a 140mm cylinder bore?
No. This part (211657) is specifically machined for engines with a 139mm cylinder diameter. If your engine has a 140mm bore, you will need a different crossover tube. Always measure your cylinder bore or check your engine’s spec plate before ordering.

Q2: How do I know if my NT855 engine requires this part?
The NT855 series uses multiple crossover tube configurations depending on the horsepower rating and generation. Visually inspect your existing tube for the part number 211657 stamped on it. Alternatively, cross-reference your engine’s serial number with the OEM parts manual for the exact tube required.

Q3: What maintenance is recommended for this air crossover tube?
During engine overhauls, inspect the tube for cracks, corrosion, or gasket surface damage. Always replace the gaskets (not included) when reinstalling. Torque the mounting bolts to specifications (typically 45-55 ft-lbs) to prevent air leaks that can cause power loss or uneven cylinder firing.