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For reliable engine cooling and optimal thermal regulation, genuine Sinotruk howo parts are the professional’s choice. The LG9704531035 Radiator Inlet Hose is a precision-engineered component that transports hot engine coolant from the thermostat housing to the radiator for cooling. Manufactured from high-quality EPDM rubber with robust textile reinforcement, this hose resists cracking, swelling, and degradation from exposure to high temperatures, coolant additives, and under-hood contaminants. The LG9704531035 is designed to exact OEM dimensions, featuring molded bends and reinforced ends for a secure, leak-free fitment on SINOTRUK HOWO heavy-duty diesel engines, ensuring consistent coolant flow and effective heat dissipation.
OEM reference LG9704531035 – direct-fit radiator inlet hose for SINOTRUK HOWO cooling systems.
Radiator Inlet Hose (EN)
Шланг входа радиатора (RU)
Manguera de entrada del radiador (ES)
The radiator inlet hose carries hot coolant from the engine to the radiator’s upper tank, where it is cooled before returning to the engine. The LG9704531035 is engineered with a smooth internal bore to minimize flow restriction and ensure efficient coolant delivery, while its molded design follows the exact routing of the original hose, preventing kinks and maintaining proper flow dynamics even under extreme engine movement.
Constructed from heat- and chemical-resistant EPDM rubber, this hose withstands continuous exposure to coolant temperatures up to 110°C and resists the degrading effects of ethylene glycol and other additives. The reinforcing textile layer provides burst strength and dimensional stability, preventing the hose from swelling or collapsing under pressure. The LG9704531035 is a durable, direct-fit replacement that restores cooling system efficiency and prevents overheating.
The smooth internal bore and precise bends minimize flow restriction, ensuring the engine receives adequate cooled coolant for stable temperatures.
The EPDM rubber compound resists degradation from hot coolant, oil, and ozone, maintaining flexibility and sealing integrity over time.
The internal fabric layer provides burst strength and prevents swelling, ensuring consistent hose diameter under pressure.
This hose matches the original routing, length, and connector profiles, allowing for quick, trouble-free installation without modifications.
The engineering of the LG9704531035 radiator inlet hose focuses on maximizing coolant flow while ensuring long-term reliability. The hose’s internal diameter is precisely matched to the thermostat housing and radiator inlet to maintain the correct flow rate, preventing cavitation in the water pump and ensuring even coolant distribution through the engine block. The hose ends are reinforced with additional rubber layers to withstand the clamping force of hose clamps without damaging the hose structure. With this hose, the cooling system maintains consistent pressure and flow, protecting the engine from thermal stress and extending its service life.
Installation is simple: drain the coolant to a level below the radiator inlet, remove the old hose clamps, detach the worn hose, clean the connection ports, and install the new LG9704531035 with fresh clamps. Torque the clamps to the manufacturer’s specified value (typically 3–5 Nm) to ensure a leak-free seal. Refill the system with the correct coolant mixture and bleed any trapped air. Always inspect the radiator and engine fittings for damage before installation. A genuine OEM hose ensures that the cooling system operates at peak efficiency.
| OEM Part Number | LG9704531035 |
| Product Name | Radiator Inlet Hose (Upper Radiator Hose) |
| Brand / Application | SINOTRUK HOWO (Heavy-duty diesel engines) |
| Length (overall) | 360 mm ± 5 mm |
| Inner Diameter | 50 mm (1.97″) |
| Max Operating Temperature | +110°C |
| Burst Pressure | 5.0 bar (72 psi) |
| Material | EPDM rubber with textile reinforcement |
| Standards | ISO 4649, SAE J20R1 |
All dimensions and performance ratings are verified against SINOTRUK HOWO factory specifications. Manufactured under ISO 9001:2015 quality control.
The radiator inlet hose is exposed to the highest coolant temperatures in the system, making it susceptible to hardening, cracking, or swelling over time. A failing hose can lead to coolant leaks, overheating, and catastrophic engine damage. Replacing it with the LG9704531035 restores cooling system integrity and prevents costly repairs. It is recommended to inspect the hose every 50,000 km and replace it at the first sign of wear or at 100,000 km intervals.
Fleet maintenance data shows that proactive replacement of radiator inlet hoses significantly reduces the risk of sudden breakdowns and engine overheating. The LG9704531035 offers superior resistance to modern long-life coolants, ensuring reliable service even in demanding applications. Regular visual inspection and squeeze testing can help identify a hose that has lost its flexibility and needs replacement.
Inspect the radiator inlet hose for cracks, bulges, or soft spots during regular service. Squeeze the hose to check for hardness or sponginess—a good hose should be firm but pliable. Check the clamp condition and re-tighten if necessary. Clean the hose ends and the radiator inlet to prevent grit from damaging the seal when installing a new hose.
Always replace the hose if you notice any coolant staining, swelling, or if the hose feels hard and brittle. The LG9704531035 is a critical component for maintaining proper engine cooling. When replacing the hose, always use new clamps and inspect the water pump and radiator connections for corrosion. A genuine OEM hose provides peace of mind and ensures your engine stays cool under all operating conditions.
Coolant puddles under the vehicle
Engine temperature gauge reading high
Visible cracks, bulges, or swelling on the hose
If you notice any of these signs, inspect the radiator inlet hose and the entire cooling system. Replace the hose with the LG9704531035 immediately if any damage or degradation is found. Do not attempt to repair a hose with tape or sealants, as this is a temporary fix that can fail suddenly. A genuine OEM hose ensures that your engine remains protected from overheating and coolant loss.
Summary: The LG9704531035 Radiator Inlet Hose is a vital component for maintaining engine cooling system integrity in SINOTRUK HOWO trucks. Its durable EPDM construction, precision fitment, and resistance to heat and chemicals make it the ideal replacement for worn or damaged hoses. Choose OEM quality to protect your engine from overheating and ensure reliable operation in all conditions.