S3B085 Turbo Chra 174840 180953 631GC436 Turbocharger Cartridge for Mack Truck With E6 Engine

S3B085 Turbo CHRA 174840 180953 631GC436 for Mack Truck E6 Engine

Product Overview

Restore your Mack E6 engine's pulling power. Direct-fit S3B085 replacement turbo cartridge (CHRA) (OEM 174840, 631GC468). VSR balanced. ISO/IATF certified factory direct.

Heavy-Duty S3B085 Turbocharger Cartridge (CHRA) for Mack Truck E6 Engines

• Restore Mack Power: Precision-engineered for a 1:1 "drop-in" fit for the legendary Mack Truck E6 diesel engine, restoring original horsepower, high-torque pulling power, and hauling efficiency.
• Cost-Effective Heavy Repair: Restore your Schwitzer/BorgWarner turbocharger to original factory specifications by replacing only the internal core (CHRA), saving significantly over the cost of a complete turbo unit.
• Superior Heat Resistance: Equipped with a premium K18 Nickel-Alloy Turbine Wheel, providing exceptional structural integrity and preventing blade creep under the intense thermal loads of heavy-duty long-haul operations.
• Precision VSR Balancing: 100% dynamic balancing tested at 150,000+ RPM on a Vibration Sorting Rig (VSR) to ensure ultra-smooth operation, zero vibration, and maximum bearing longevity—critical for heavy-duty truck uptime.
• Factory Direct Quality: Manufactured to meet or exceed ISO 9001 and IATF 16949 standards, offering a high-reliability alternative for fleet maintenance and owner-operators.

Technical Specifications & OEM Cross-Reference

Applications

• Mack Trucks: Vocational and over-the-road heavy trucks equipped with E6 engine platforms.
• Engine Series: Mack Truck E6 2V, E6 4V, and high-horsepower 11.0L diesel configurations.
• Other Equipment: Compatible with various heavy-duty commercial vehicles utilizing the S3B turbo configuration for legacy Mack Truck power systems.
• BorgWarner / Schwitzer Numbers: 174840, 180953, 185041, 187183, 188891, 194768, 199453, 474840, 480953, 487183, 488891, 494768, 499453
• Mack Truck OEM Numbers: 631GC436, 631GC468, 631GC468X, 631GC5106P23, 631GC5106P3, 631GC5114, 20705144, 3580250 

FAQs

Q1: How do I verify if this S3B085 CHRA fits my Mack Truck E6 engine? 

Please check the nameplate on your turbocharger's compressor housing for the part number 174840 or 180953. Since Mack Truck E6 engines have several industrial and regional variations, matching the 6-digit Schwitzer/BorgWarner part number or the Mack Truck "631GC" number is the most reliable way to ensure a correct fit.

Q2: Does this cartridge provide the same reliability as a complete new turbocharger for a Mack Truck? 

Yes. Since the external cast-iron and aluminum housings rarely wear out, replacing the internal Cartridge (CHRA) with our high-precision unit provides 100% original factory performance. By using high-grade K18 nickel-alloy wheels and professional VSR balancing, we ensure it meets the heavy-duty demands of long-haul trucking.

Q3: Is this cartridge pre-balanced and ready for immediate installation? 

Yes. Every Zhongke cartridge is VSR balanced at high speeds to ensure it is ready for immediate installation into your original housings. This prevents the "whining" sound and premature bearing failure often associated with unbalance cores in high-torque heavy truck engines.

Q4: What type of warranty do you provide for Mack Truck heavy-duty engine parts? 

We understand that Mack Truck engines are built for extreme durability and high uptime, which is why we stand behind our quality with full technical support for truck owners and professional maintenance workshops worldwide.

Q5: Do you provide worldwide shipping? What is the delivery timeframe? 

We ship globally via premium carriers like DHL, FedEx, and UPS, as well as sea freight for bulk orders. In-stock items are typically dispatched within 24–48 hours. Express delivery to North America and Europe usually takes 5–7 business days.

About Us

Fengcheng Zhongke Turbocharger Co., Ltd. is a leading high-tech factory specializing in the R&D, production, and global distribution of high-performance turbochargers. Based in Fengcheng—one of the world’s most renowned turbocharger manufacturing hubs—we have grown from a local workshop into a global supplier, serving heavy-duty, commercial, and passenger vehicle markets worldwide.

At Zhongke, we don't just "make" parts.we engineer reliability.

• Material Integrity: We exclusively use K18 Nickel-Alloy turbine wheels, capable of withstanding extreme exhaust temperatures (up to 950°C) without deformation.
• Dynamic Balancing: 100% of our turbochargers undergo high-speed dynamic balancing tests at 150,000+ RPM to guarantee zero vibration and extended bearing life.
• Certified Quality: Our production processes are certified under ISO 9001 and IATF 16949, the gold standards for the global automotive and heavy-machinery industries.

Manufacturing Prowess:Our facility is equipped with state-of-the-art production lines, including precision 5-Axis CNC machining centers, high-speed VSR (Vibration Sorting Rig) balancing machines, and advanced material testing labs.

Our Specialization:We maintain a vast inventory of over 3,500+ turbocharger models, with a focus on heavy-duty and construction machinery engines, including Cummins, Caterpillar, Komatsu, Scania, Kobelco, and Hitachi. Beyond heavy-duty machinery, we also provide a comprehensive range of turbochargers for passenger vehicles and light commercial vans. Our catalog covers over 1,000 applications for leading automotive brands including Nissan, Audi, BMW, Mercedes-Benz, Toyota, Honda, and Hyundai. Focused on optimizing fuel efficiency and restoring factory horsepower, our passenger car turbos are engineered with the same precision and K18 heat-resistant materials as our industrial line, ensuring reliable performance for daily commuting and high-speed driving alike.

Global Partnership & Support: Zhongke Turbo is more than just a manufacturer; we are your long-term technical partner. With nearly 30 years of export experience, we understand the logistics and technical requirements of the international market. We provide a warranty and dedicated technical support to help our partners succeed.

• Key Export Regions: North America, Europe, the Middle East, Africa, Latin America, and Southeast Asia.

Experience the difference of nearly 30 years of factory expertise. Contact us today for wholesale inquiries or technical consultations.