Structural Features and Advantages
The 49179-02110 turbocharger is a heavy-duty, high-flow forced induction unit designed specifically for Mitsubishi’s medium-to-large bore engines: the 6-cylinder S6R series and the 12-cylinder S12R series. Structurally, it features a divided twin-scroll turbine housing that separates exhaust pulses from cylinders with firing intervals that are 240° apart (for S6R) and 360° apart (for S12R). This pulse separation reduces interference and delivers more consistent torque to the turbine wheel, improving low-end response. The compressor housing incorporates a map width enhancement (MWE) groove with a ported shroud, which extends the surge margin and allows stable operation at higher boost levels without flutter. The rotating assembly uses a semi-floating bearing supported by a single, one-piece bearing housing with integrated oil dams, reducing part count and improving concentricity. Additional advantages include improved fuel economy (by up to 8% compared to earlier single-scroll designs), lower exhaust gas temperatures at rated load, and a modular cartridge design that allows on-site rebuilds without removing the entire turbo from the engine.
Core Working Principle
The 49179-02110 turbocharger operates using the pulse-turbocharging principle. Exhaust manifolds on the S6R or S12R engine are divided into two separate groups, each feeding one of the two scrolls in the turbine housing. As each cylinder exhausts, its pressure wave remains isolated until it reaches the twin-entry nozzle. This preserves kinetic energy that would otherwise be lost in a single-entry housing, especially at low engine speeds. The high-velocity gases spin the turbine wheel, which drives a backward-curved compressor wheel. The compressed air passes through a charge air cooler before entering the intake manifold. An internal wastegate (actuated by pneumatic diaphragm) is calibrated to open at approximately 2.3 bar absolute boost, protecting the engine from overboost during transient spikes. Because the S12R engine has twice the exhaust volume of the S6R, the same turbocharger can be used on both by adjusting the wastegate preload and nozzle ring clearance – making the 49179-02110 a versatile replacement part for many Mitsubishi industrial power units.
Main Application Equipment
The 49179-02110 turbocharger is factory-original or a direct replacement for hundreds of Mitsubishi S6R and S12R powered machines, including:
Heavy-duty diesel generator sets (150–600 kVA range) used in mining, oil & gas fields, and hospital backup systems.
Marine main propulsion engines for tugboats, pilot vessels, fishing trawlers, and small coastal freighters.
Locomotive power units for shunting and regional rail service.
Large agricultural irrigation pumps and drainage stations requiring continuous operation for weeks.
Compressor packages for natural gas gathering and pipeline pressure boosting.
Crushers and screeners in quarry and recycling plants powered by stationary S6R or S12R engines.
Both the S6R and S12R platforms are known for their robust cast-iron blocks and long overhaul intervals (15,000–20,000 hours). The 49179-02110 turbocharger preserves these characteristics while delivering the extra horsepower needed for the most demanding industrial roles.
Common Failure Symptoms & Repair/Replacement Guidelines
Failure symptoms typical of a worn or damaged 49179-02110 on an S6R/S12R engine:
Poor acceleration under load – black smoke and low boost pressure (below 1.5 bar relative at rated speed). Often caused by carbon buildup in the twin-scroll divider or a stuck wastegate.
Unusual siren or howling noise – indicates compressor wheel contact with the housing due to failed thrust bearing or foreign object damage.
Excessive oil consumption – blue smoke from the exhaust and oil pooling in the compressor outlet, pointing to worn seal rings.
Fluctuating boost pressure – needle on the boost gauge oscillates rapidly, typically due to damaged turbine blades or a bent shaft.
Vibration transmitted to the engine – imbalance from damaged wheel(s) can be felt as a high-frequency buzz through the frame.
Repair and replacement points:
Before removal, mark the relative position of turbine housing to bearing housing and compressor housing to preserve balance grouping.
Always inspect the twin-scroll divider for cracks – a cracked divider causes pulse interference and permanent performance loss; replace the turbine housing if found.
Use only a 49179-02110 cartridge with certified VSR (vibration sorting) balance report. Do not mix parts from different turbo models.
Pre-fill the turbo with clean engine oil through the top port while rotating the shaft by hand until oil exits the drain hole.
After installation, perform a dry cranking (fuel off) for 15 seconds to build oil pressure before starting. Then run at idle for 3 minutes before applying load.
Thread locking compound is recommended on wastegate actuator mounting bolts due to intense vibration levels on S12R engines.
Why Choose Rsolid Engine Parts for the 49179-02110 Turbo
Rsolid Engine Parts (www.rinjector.com) specializes in high-quality turbochargers for Japanese industrial diesel engines. Each 49179-02110 unit supplied by Rsolid undergoes full factory remanufacturing or brand-new production with genuine-spec bearings, seals, and wheels. Key advantages of purchasing from Rsolid Engine Parts include:
Interchangeability guarantee – Verified fit on both S6R and S12R engines; no modifications required to oil lines or exhaust connections.
Quality control – Each turbo is cold-balanced (ISO G2.5) and hot-tested on a gas stand to verify wastegate function and boost curve.
Fast logistics – Ready-to-ship from warehouses near major ports; express air freight available for emergency breakdowns.
Technical hotline – Speak directly with diesel technicians via WhatsApp to diagnose before you buy.
Competitive trade pricing – Discounts for workshops, fleets, and international distributors based on order volume.
Contact Rsolid Engine Parts today via WhatsApp: +8615975376778 or browse the online catalog at www.rinjector.com to order the 49179-02110 turbocharger for Mitsubishi S6R / S12R engines. Same-day dispatch for orders before 2 PM (GMT+8).
