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For reliable turbocharger-to-intercooler airflow and maximum engine efficiency, genuine Sinotruk howo parts are the professional’s choice. The WG9725536049 Intercooler Inlet Hose is a precision-engineered component that delivers compressed, hot air from the turbocharger to the intercooler for cooling. Constructed from high-grade silicone rubber with robust aramid fiber reinforcement, this hose withstands extreme temperatures up to 220°C and pulsating boost pressures without deforming or leaking. The WG9725536049 is manufactured to exact OEM geometry, ensuring a perfect fit and secure connection for SINOTRUK HOWO turbo-diesel engines, maintaining optimal charge air density and combustion efficiency.
OEM reference WG9725536049 – direct-fit intercooler inlet hose for SINOTRUK HOWO heavy-duty trucks.
Intercooler Inlet Hose (EN) / Входной шланг интеркулера (RU) / Manguera de entrada del intercooler (ES)
The intercooler inlet hose must handle the full force of turbocharged air, often exceeding 200°C and 3.5 bar of pressure. The WG9725536049 is constructed from a premium silicone compound that remains flexible across a wide temperature range while resisting oil, fuel, and ozone degradation. Its multi-layer reinforcement provides exceptional burst strength and dimensional stability, ensuring that the hose does not expand or collapse under extreme conditions.
Each hose is 100% pressure-tested and dimensionally inspected to guarantee a perfect seal at both turbocharger and intercooler connections. The smooth internal bore minimizes flow restriction and turbulence, ensuring that the intercooler receives the maximum possible air volume for cooling. The WG9725536049 is a durable, direct-fit replacement that restores power and efficiency, reducing fuel consumption and emissions.
The WG9725536049 features aramid fiber reinforcement, enabling it to withstand burst pressures up to 12 bar, far exceeding standard operating conditions.
Designed to handle continuous temperatures up to 220°C, this hose prevents softening or blistering in the hot engine bay.
The silicone material resists degradation from engine oil, diesel fuel, and coolant vapors, ensuring long-term reliability.
This hose replicates the original routing, length, and connector profiles, allowing for swift installation without modifications.
The engineering behind this inlet hose focuses on maintaining consistent airflow under all operating conditions. The hose’s internal diameter is carefully matched to the turbocharger outlet and intercooler inlet to prevent turbulence-induced pressure drops. The integrated anti-collapse design ensures that the hose retains its shape even under high vacuum conditions that can occur during sudden throttle closure. With the WG9725536049, the engine receives a steady, uninterrupted supply of compressed air, enabling optimal combustion efficiency and reduced emissions.
Installation is straightforward: release the old clamps, remove the worn hose, clean the connection pipes, and fit the new WG9725536049 with fresh clamps torqued to 4–5 Nm. Always inspect the turbocharger and intercooler outlets for damage or debris before installation. After installation, conduct a boost leak test to ensure all connections are sealed. A genuine OEM hose guarantees that the air volume and pressure reaching the intercooler are exactly as designed, protecting the engine from lean conditions.
| OEM Part Number | WG9725536049 |
| Product Name | Intercooler Inlet Hose (Charge Air Hose) |
| Brand / Application | SINOTRUK HOWO (Heavy-duty diesel engines) |
| Length (overall) | 470 mm ± 5 mm |
| Inner Diameter (turbo side) | 70 mm |
| Inner Diameter (intercooler side) | 76 mm |
| Max Operating Pressure | 5.5 bar (working), 12 bar (burst) |
| Temperature Range | -40°C to +220°C |
| Material | High-temp silicone with aramid reinforcement, 4-ply construction |
All dimensions and performance ratings are verified against SINOTRUK HOWO factory specifications. This hose is manufactured under ISO 9001:2015 quality control.
The intercooler inlet hose is subjected to extreme heat and pressure daily, making it prone to hardening, cracking, or delamination over time. A failing hose can cause boost leaks, leading to reduced power, increased exhaust temperatures, and higher fuel consumption. Replacing it with the WG9725536049 restores intake integrity and engine responsiveness, especially in high-mileage vehicles or those operating in hot climates.
Fleet maintenance records show that replacing aged inlet hoses with the WG9725536049 can improve fuel economy by up to 5% and reduce turbocharger stress. The hose’s robust construction prevents sudden failure, eliminating the risk of roadside breakdowns caused by boost loss. Regular inspection is recommended as part of a proactive maintenance schedule.
Inspect the inlet hose for cracks, bulges, or chafing against engine components during regular service intervals. Check the clamp tension and replace any corroded or damaged clamps. Clean the hose exterior with a mild detergent to remove oil and dirt that can accelerate material degradation. If the hose feels excessively soft or shows signs of internal delamination, replace it promptly.
Always replace the hose if you notice a drop in boost pressure or hear a hissing sound from the engine bay. The WG9725536049 is a critical component for maintaining proper air-fuel ratios and protecting the engine from overheating. Using a genuine OEM hose ensures a perfect fit and long service life, safeguarding your turbocharger and engine investment.
Visible cracking or hardening of rubber
Whistling or hissing sound under acceleration
Loss of power or black smoke from exhaust
If you observe any of these signs, inspect the intercooler inlet hose immediately. Replace it with the WG9725536049 if any damage or degradation is found. Never attempt to patch a damaged hose with tape or sealants, as this can lead to sudden failure and engine damage. A genuine OEM hose ensures reliable boost delivery and peace of mind.
Summary: The WG9725536049 Intercooler Inlet Hose is a vital component for maintaining turbocharger efficiency and engine performance in SINOTRUK HOWO trucks. Its advanced silicone construction, precision fit, and durability make it the ideal replacement for worn or failing hoses. Choose genuine quality to ensure your engine receives the full benefit of turbocharged air.