ST50 Turbocharger for Truck with VT903 / VT8 Engine
Turbo Model & Part Numbers
Turbo Model: ST50
OEM / Reference Part Numbers:
3032047, 196389, 3522873, 3801616, 3801922,
AR12089, AR12857,
150552-9000
(Please confirm engine model and turbo part number before ordering.)
Product Overview
The ST50 turbocharger is a heavy-duty OEM-standard replacement engineered for trucks equipped with VT903 and VT8 diesel engines. These large-displacement engines are widely used in heavy trucks, military vehicles, industrial transport, and special-purpose equipment, where stable power output and durability are essential.
When an ST50 turbocharger wears out, operators often experience reduced power, excessive exhaust smoke, high fuel consumption, and poor engine response. This replacement ST50 turbo restores correct airflow and boost pressure, allowing the VT903 / VT8 engine to regain its original torque, efficiency, and reliability.
Manufactured with high-temperature-resistant materials, reinforced bearings, and a precision-balanced rotating assembly, the ST50 turbocharger is designed for continuous operation under heavy load and harsh working conditions.
Key Features
OEM-Spec Direct Replacement
Designed to match original ST50 turbocharger dimensions and listed OEM part numbers.
Heavy-Duty Construction
Built for high-displacement diesel engines operating under sustained load.
Stable Boost Performance
Restores factory boost pressure for consistent power delivery.
Reduced Turbo Lag
Optimized turbine and compressor design improves throttle response.
Precision Dynamic Balancing
CHRA is dynamically balanced to reduce vibration and extend service life.
Engine & Vehicle Compatibility
- Diesel engines: VT903 / VT8
- Heavy-duty trucks and transport vehicles
- Industrial and special-purpose diesel applications
- Long-haul and high-load operating environments
Who This Turbocharger Is For
The ST50 turbocharger is ideal for:
- Heavy truck operators
- Fleet maintenance managers
- Diesel engine repair workshops
- Industrial vehicle service providers
- Engine rebuilders and remanufacturers
Problems This Turbocharger Solves
This ST50 turbocharger helps resolve:
- Engine power loss under load
- Excessive black smoke and poor combustion
- High fuel consumption
- Turbo noise, oil leakage, or bearing wear
- Reduced reliability during long-distance operation
By restoring proper airflow and boost pressure, this turbocharger improves overall engine efficiency and operational stability.
Benefits
- Restores factory-level power and torque
- Improves fuel efficiency and combustion quality
- Enhances reliability for long-haul and heavy-duty use
- Reduces exhaust smoke and emissions
- Designed for extended service life
Technical Specifications
| Turbo | Specification |
|---|---|
| Turbo Model | ST50 Turbocharger |
| Engine Compatibility | VT903 / VT8 Diesel |
| Turbo Type | Fixed geometry |
| Cooling | Oil-cooled |
| Condition | Brand new |
| Balancing | High-speed dynamic balanced |
| Application | Heavy-duty truck |
| Warranty | 6 months |
Installation Guide
Installation Steps
- Shut down the engine and allow it to cool completely.
- Drain engine oil and inspect oil feed and return lines.
- Remove the old turbocharger and clean all mounting surfaces.
- Inspect intake, exhaust, and intercooler systems for contamination.
- Pre-lubricate the ST50 turbocharger with clean engine oil.
- Install using OEM torque specifications.
- Reconnect oil lines, intake, and exhaust connections.
- Start the engine and idle for 3–5 minutes to check oil pressure and leaks.
Professional installation is recommended for best results.
Maintenance Recommendations
- Use OEM-approved engine oil and filters
- Follow scheduled oil change intervals
- Maintain clean air filtration systems
- Allow engine to idle briefly after heavy-load operation
- Inspect turbo connections periodically
Typical Usage Scenarios
- Long-haul and heavy transport trucks
- Military and special-purpose vehicles
- Fleet turbo replacement programs
- Engine overhaul and refurbishment projects
- Industrial diesel vehicle maintenance
Frequently Asked Questions (FAQ)
Q1: Is this a direct replacement ST50 turbocharger?
Yes, it is manufactured to OEM specifications for all listed part numbers.
Q2: Can this turbo restore lost engine power?
Yes, it restores correct boost pressure and airflow, improving torque and response.
Q3: Is this turbo suitable for continuous heavy-duty operation?
Yes, it is designed for sustained high-load diesel engine use.
Q4: Is the turbocharger pre-balanced?
Yes, the CHRA is dynamically balanced before delivery.
Q5: What warranty is provided?
A 12-month warranty against manufacturing defects is included.
Why Choose Us
Professional Turbocharger Manufacturer
We specialize exclusively in turbochargers and turbo components for diesel engines, serving heavy truck, industrial, construction, agricultural, and marine markets.
Quality Assurance
- OEM-standard production processes
- Precision machining and assembly
- Multi-stage inspection and testing
- Stable quality for long-term supply
About Us
Fengcheng Zhongke Turbocharger Co., Ltd., established in 2001, is a professional manufacturer of complete turbochargers, CHRAs, turbine shafts, compressor wheels, and repair kits.
Our products are exported worldwide to North America, Europe, South America, the Middle East, Africa, and Asia, supporting fleets, distributors, and engine rebuilders.
Our Team
Our team includes experienced turbocharger engineers, quality inspectors, and international sales specialists. With strong technical expertise and global market understanding, we provide accurate product matching and dependable support.
OEM & Aftermarket Services
- OEM and ODM manufacturing
- Private labeling and bulk supply
- Technical confirmation before shipment
- Long-term cooperation for fleet and distributor clients
Looking for a reliable ST50 turbocharger supplier for VT903 or VT8 engines?
Contact us today for technical verification, pricing, and availability.
ST50 Turbocharger for VT903 VT8 Engine | OEM Replacement 3032047 3801616 ST50 turbocharger for VT903 and VT8 diesel truck engines. Compatible with 3032047, 196389, 3522873, 3801616. Restore power, torque, and reliability for heavy-duty trucks.
- ST50 turbocharger
- VT903 turbo
- VT8 engine turbocharger
- Heavy-duty truck turbo
- OEM VT903 turbo replacement
- Industrial diesel turbo supplier
- Fleet truck turbocharger
- Long-haul diesel engine turbo
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