H1E Turbo 3525689 3802304 3919203 Turbocharger for Cummins 4BTAM 6BTAM Engine

H1E Marine Turbocharger 3802884 3525688 for Cummins 4BTAM & 6BTAM Engine

Product Overview

Restore power to your Cummins 4BTAM or 6BTAM. Exact-fit H1E marine replacement turbo (OEM 3525688, 3802884). ISO/IATF certified factory direct.

Marine-Grade H1E Turbocharger for Cummins 4BTAM & 6BTAM (3.9L / 5.9L) Engines

• Direct "Drop-In" Fit: Specifically engineered for a 1:1 replacement in Cummins Marine B-Series engines. Fully compatible with water-cooled manifolds and factory oil lines—ensuring zero-modification installation on your vessel.
• Optimized for Marine Power: Precision-tuned for the 4BTAM and 6BTAM platforms to provide rapid boost response, helping your vessel reach cruising speed faster while maintaining peak fuel efficiency.
• K18 Nickel-Alloy Turbine Wheel: Features a premium K18 Nickel-Alloy turbine wheel, designed to withstand the sustained high thermal loads of a marine diesel engine without blade deformation.
• VSR High-Speed Balancing: 100% dynamic balancing tested on a Vibration Sorting Rig (VSR) at speeds exceeding 150,000 RPM. Technical Benefit: This ensures ultra-smooth operation, eliminates shaft vibration, and maximizes bearing life in harsh open-sea conditions.
• Corrosion-Resistant Coating: The housings are treated to provide enhanced resistance against saltwater air and high-humidity marine environments, preventing premature rusting and sticking.

Technical Specifications & OEM Cross-Reference

Applications

• Marine Propulsion: Fishing vessels, tugboats, and yachts utilizing Cummins 4BTAM and 6BTAM engines.
• Marine Auxiliaries: Shipboard generator sets and high-capacity water pumps.
• Industrial Power: Specialized high-output vocational machines and stationary power units.
• Engine Series: Cummins 4BT, 6BT, 4BTAM, 6BTAM Turbocharged & Aftercooled Marine Diesel.
• Holset Numbers: 3525688, 3525689, 3528781, 3528782, 3530737, 3530743, 3531035, 3532208, 3533735, 3533736, 3533737, 3534375, 3534376, 3535458, 3535459, 3535534, 3535535, 3538071, 3538072, 3538124, 3538125, 3538777, 3538778, 3538827, 3538828, 3538829, 3538830, 3539470, 3539471
• Cummins OEM Numbers: 3802304, 3802590, 3802595, 3802832, 3802883, 3802884, 3802910, 3919203, 3926199
• Reman Codes (Reference Only): 3802304NX, 3802304RX, 3802590NX, 3802590RX, 3802595NX, 3802595RX, 3802832NX, 3802832RX, 3802883NX, 3802883RX, 3802884NX, 3802884RX, 3802910NX, 3802910RX  

FAQs

Q1: How do I verify fitment for my boat's engine? 

Please check the nameplate on your old turbocharger for the part number 3525689 or the Cummins number 3802304. Marine B-series engines have many turbo variations based on horsepower ratings, so matching the OEM number is the most reliable way to ensure 100% fitment.

Q2: My old turbo is marked with an "RX" suffix. Is this new unit compatible? 

Yes. The "RX" or "NX" suffix indicates a Remanufactured or Exchange unit from an authorized dealer. Our H1E is a brand-new direct replacement for those numbers, offering identical fitment and often superior performance due to modern balancing techniques.

Q3: Does the turbo come with the mounting gaskets? 

Yes. This unit typically includes a premium mounting gasket kit for the T3 flange and oil connections. We always recommend using new gaskets for marine engines to prevent power-robbing exhaust leaks.

Q4: What maintenance is critical for Cummins Marine turbochargers? 

Clean oil and clear cooling. Ensure your Oil Feed Line is clear and replace the Engine Oil during installation. For marine engines, checking the air intake for saltwater salt-crust buildup is also critical to prevent compressor wheel erosion.

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, Isuzu, Sumitomo, 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.