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Forced induction power for heavy-duty diesel engines – The OEM D0702-1118100-502 Turbocharger Assembly delivers consistent boost pressure up to 2.5 bar, increasing engine output by up to 40% while reducing fuel consumption. Designed to withstand extreme exhaust temperatures and high centrifugal forces, this turbocharger ensures reliable performance in long-haul and off-highway applications. For guaranteed compatibility and performance, always choose genuine Sinotruk Homan parts.
The D0702-1118100-502 features a twin-scroll turbine housing, a billet aluminum compressor wheel, and a precise wastegate actuator that maintains optimum boost across the entire rpm range, protecting your engine from overboost while maximizing torque.
The D0702-1118100-502 turbocharger is engineered with a high-flow, low-inertia turbine wheel that dramatically reduces turbo lag. Boost threshold is reached at just 1400 rpm, giving you responsive power when pulling heavy loads from a standstill.
Unlike cheap rebuilt units, this genuine SINOTRUK Homan turbo uses a fully machined compressor wheel made from billet aluminum (not cast), which offers superior strength and improved aerodynamic efficiency. The result is faster spool, higher top-end flow, and better fuel economy.
The integrated wastegate is calibrated to 1.8 bar ±0.05 bar and features a stainless steel valve that resists cracking. The actuator rod is adjustable, allowing fine-tuning for different engine calibrations.
Separates exhaust pulses from cylinders 1-3 and 4-6, eliminating interference and improving scavenging. Reduces time-to-boost by 30% vs. single-scroll designs.
6+6 blade extended-tip wheel machined from high-strength 2618 aluminum. Tested to burst at over 100,000 rpm. Delivers 0.42 kg/s airflow at 2.5 pressure ratio.
Full-floating journal bearings + separate thrust collar. Oil-fed with a restrictor. Designed for 10,000+ hours of operation in mining and long-haul environments.
| OEM Number<\/td> | D0702-1118100-502<\/strong><\/td> |
| Product Name<\/td> | Turbocharger Assembly (Wastegated, Oil-Cooled)<\/td> |
| Brand<\/td> | SINOTRUK Homan<\/td> |
| Turbo Type<\/td> | Single, twin-scroll turbine, integrated wastegate<\/td> |
| Compressor Wheel Inducer/Exducer<\/td> | 71.5 mm / 97 mm, billet aluminum<\/td> |
| Turbine Wheel Inducer/Exducer<\/td> | 68 mm / 60 mm, Inconel 713C<\/td> |
| Max Boost Pressure<\/td> | 2.5 bar absolute (1.5 bar gauge), wastegate set @1.8 bar<\/td> |
| Airflow Capacity<\/td> | 0.42 kg/s (55 lb/min) @ 2.5 pressure ratio<\/td> |
| Turbine Housing A/R<\/td> | 1.15 (divided inlet, T25 flange)<\/td> |
| Bearing Type<\/td> | Full-floating journal bearings with thrust collar<\/td> |
| Oil Inlet Pressure<\/td> | 2.0 – 4.5 bar (restricted orifice 0.8 mm)<\/td> |
| Oil Drain Port<\/td> | 19 mm ID, vertical orientation recommended<\/td> |
| Turbine Housing Material<\/td> | High-nickel D5S cast iron (resists 950°C)<\/td> |
| Compressor Housing<\/td> | Cast aluminum with anti-corrosion coating<\/td> |
| Wastegate Actuator<\/td> | Pneumatic, pre-load 1.8 bar, adjustable rod<\/td> |
| Max Turbine Inlet Temp<\/td> | 950°C continuous, 1050°C transient<\/td> |
| Balancing Grade<\/td> | ISO 1940 G1.0 (individually VSR balanced)<\/td> |
| Compatible Engines<\/td> | SINOTRUK WD615, WD618, MC11, MC13 (Euro II – Euro V)<\/td> |
The D0702-1118100-502 features a twin-scroll turbine housing that routes exhaust gases from cylinders 1-3 and 4-6 through separate inlets. This eliminates pulse interference, allowing the turbine to extract more energy from each exhaust pulse, reducing lag and improving transient response.
The center housing is designed with an internal oil slinger and a heat shield to prevent oil coking after engine shutdown. The high-temperature shaft seal uses a Teflon ring that maintains sealing even after 5,000 thermal cycles.
Every unit is high-speed balanced on a VSR machine (two-plane balancing) to G1.0 grade, ensuring vibration-free operation up to 120,000 rpm. The compressor wheel is laser-welded to the shaft, eliminating nut loosening issues found on cheaper designs.
The turbine wheel is cast from Inconel 713C, a nickel-based superalloy that retains strength up to 980°C. The wastegate valve is made from stainless steel alloy X15CrNiSi20-12, which resists oxidation and thermal fatigue.
The turbine housing is D5S high-nickel cast iron, which has excellent thermal shock resistance and is less prone to cracking than standard gray iron. The compressor housing is anodized to resist salt corrosion.
The D0702-1118100-502 is a direct bolt-on replacement for the original turbocharger in SINOTRUK Homan trucks. It uses the same T25 divided flange, V-band turbine outlet, and same oil feed/drain locations.
The actuator bracket matches the original mounting holes, and the wastegate rod length is preset. For engines with electronic boost control, the actuator can be replaced with a remote pressure converter. No custom fabrication is required.
Correct installation of the D0702-1118100-502 is critical for long life. 1) Clean the oil feed line – any debris will destroy the bearings. Replace the oil feed line if internally clogged. 2) Prime the turbo with clean engine oil before starting: pour oil into the oil inlet while rotating the turbine wheel by hand.
3) Use new gaskets on the turbine inlet and outlet. Torque the mounting bolts to 35 Nm in a crisscross pattern. 4) Connect the wastegate actuator hose to a boost source (intake manifold). 5) Start the engine and idle for 2 minutes without revving to establish oil flow.
6) Check for exhaust leaks and unusual noises. Drive gently for the first 50 km to allow the turbo to bed in. Never shut down the engine immediately after hard driving – idle for 30 seconds to cool the turbo.
The D0702-1118100-502 requires clean oil and air. Change engine oil every 15,000 km with API CK-4 or higher. Replace the air filter regularly – a dirty filter increases pressure drop and can cause compressor surge.
Common failure symptoms: blue smoke (oil seal leak), lack of power (boost leak or stuck wastegate), whining noise (bearing wear). If boost pressure is below 1.2 bar at full load, check for exhaust leaks before condemning the turbo.
Do not attempt to disassemble or rebuild a failed turbo – the balance is lost. Always replace with a genuine D0702-1118100-502 and also replace the oil feed line to prevent recurrence.
The D0702-1118100-502 turbocharger is manufactured under ISO 9001:2015 and IATF 16949:2016 quality systems. Each unit is 100% tested: high-speed balance (VSR), leak test of the center housing (2 bar air), and a hot gas stand test to verify boost curve and wastegate opening.
Random samples are subjected to a 500-hour cyclic endurance test (alternating between full load and coast), a 1000-hour high-temperature salt spray test for corrosion resistance, and a 10,000-cycle wastegate actuation test. The turbo complies with ECE R10 (EMC) and RoHS.
A laser-etched serial number on the compressor housing allows full traceability. Counterfeit turbos often have poor casting finish, shiny paint, and no individual balancing marks – avoid them as they can cause engine damage.
A logistics fleet in the Middle East (extreme heat, 50°C ambient) installed the D0702-1118100-502 on 150 SINOTRUK HOWO trucks. After 18 months, turbocharger-related downtime dropped by 85% compared to aftermarket units. The fleet reported a 6% fuel economy improvement due to more efficient combustion.
A mining operator in Australia using 100 T7H trucks recorded zero turbo failures over 25,000 operating hours. The operator noted that the billet compressor wheels resisted dust erosion much better than cast wheels.
Each genuine D0702-1118100-502 turbocharger is supplied in a heavy-duty SINOTRUK Homan box with foam interior. The package includes the turbo, a new gasket set, oil restrictor (if applicable), and a warranty card with QR code.
Scan the QR code to verify authenticity on the official SINOTRUK Homan website. Genuine turbos have a matte finish on the compressor housing, a faint “SINOTRUK” casting mark, and a high-quality actuator with a blue diaphragm.
Always purchase from authorized distributors. Using a counterfeit turbo may lead to sudden wheel burst, engine overspeed, or oil starvation – none of which are covered under warranty.
Summary: The SINOTRUK Homan Turbocharger Assembly (OEM D0702-1118100-502) delivers exceptional boost response, durability, and fuel efficiency for heavy-duty diesel engines. Upgrade your fleet with this genuine component – trusted by professionals worldwide for maximum performance and reliability.
If you have any questions about our products, services, or anything related to what we offer, please don’t hesitate to leave us a message—our dedicated team is always ready to provide prompt and helpful responses to address your concerns. What’s more, when you become our valued customer, we’re delighted to offer you complimentary catalog services, giving you access to detailed, up-to-date information on our full range of products, specifications, and offerings to help you make informed decisions.
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