The expansion tank is a vital component of your engine’s cooling system, responsible for storing excess coolant, maintaining stable system pressure, and preventing overheating. The 711W515016070 HOWO Expansion tank from HOWO is engineered to deliver exceptional thermal stability, durable construction, and a precise factory fit, ensuring that your engine operates at optimal temperatures under the most demanding conditions. As a critical Howo/Sitrak truck parts solution, this expansion tank is manufactured from high-grade, heat-resistant materials with precision-formed mounting points and a reliable sealing system, providing outstanding resistance to pressure fluctuations, thermal cycling, and coolant corrosion. Whether you are replacing a cracked or leaking tank or performing a full cooling system service, the 711W515016070 guarantees a perfect factory fit, consistent coolant levels, and extended engine life – making it the trusted choice for professional workshops and fleet operators worldwide.
The expansion tank plays a crucial role in the truck cooling system, absorbing the volume changes of coolant as it heats and cools, and maintaining stable pressure to prevent radiator damage and overflow[reference:0][reference:1]. The 711W515016070 is specifically designed to provide a reliable reservoir for excess coolant, ensuring that your engine maintains consistent operating temperatures even under heavy loads and extreme ambient conditions. A damaged or degraded expansion tank can lead to coolant loss, air ingress, pressure instability, and eventual engine overheating[reference:2]. HOWO has engineered this expansion tank with a robust, impact-resistant construction that withstands continuous exposure to ethylene glycol coolant at temperatures ranging from -40°C to +130°C[reference:3]. Its precision-formed mounting points ensure a secure, vibration-free installation, while the integrated sealing system prevents leaks and contamination. With the 711W515016070, you restore the original cooling system integrity, protect your engine from thermal stress, and ensure reliable operation for thousands of miles.
Thermal Stability
-40°C to +130°C
Pressure Resistant
Stable System
OEM Grade
Genuine HOWO
Coolant Control
Overflow Protection
The 711W515016070 expansion tank is manufactured to the highest OEM standards, incorporating advanced materials and precision engineering. Below are the complete technical specifications for this essential cooling system component.
| Parameter | Specification | Detail |
|---|---|---|
| OEM Number | 711W515016070 | Exact Match |
| Part Name | HOWO Expansion Tank | Genuine HOWO |
| Brand | HOWO | Original Equipment |
| Application | HOWO T7H / A7 / Heavy-Duty Trucks | Engine cooling system |
| Material | High-grade polymer / composite | Heat & impact resistant |
| Coolant Compatibility | Ethylene glycol / water (up to 50%) | Excellent resistance |
| Temperature Range | -40°C to +130°C | Extreme duty |
| Mounting Type | Bolt-on (factory spec) | Precision fitment |
| Origin | Jinan, China | HOWO Manufacturing |
| Warranty | 12 Months | Manufacturer Guarantee |
The 711W515016070 expansion tank is produced using advanced injection moulding and precision assembly techniques to ensure consistent quality and exceptional durability. The high-grade polymer material is specifically formulated to withstand the aggressive additives in modern engine coolants and the extreme temperature fluctuations experienced in heavy-duty diesel applications. The tank’s internal design incorporates strategically placed baffles to minimise coolant surge and ensure consistent fluid levels, even during rapid vehicle manoeuvres. The precision-formed mounting points and integrated hose connections match the original equipment specifications, guaranteeing a leak-free, vibration-resistant installation[reference:4]. Each tank is pressure-tested and inspected for dimensional accuracy, sealing integrity, and material consistency, guaranteeing that the 711W515016070 meets HOWO’s stringent quality standards. This meticulous engineering ensures that your cooling system operates reliably, maintaining optimal engine temperatures and protecting your powertrain from thermal stress.
The 711W515016070 expansion tank is specifically designed for HOWO heavy-duty trucks, including the T7H, A7, and derivative models, as well as many Sinotruk vehicles that share the same cooling system architecture[reference:5]. It directly replaces the original expansion tank with identical mounting points, hose connections, and dimensional specifications, ensuring a straightforward installation without modifications. The tank is compatible with all factory-specified radiator caps, coolant hoses, and overflow lines, and it works seamlessly with the original equipment cooling system. This expansion tank is also compatible with many other commercial vehicles that utilise the same cooling system design. To confirm fitment, always cross-reference the OEM number on your existing tank with 711W515016070. If they match, this component will integrate seamlessly. Keeping this tank in your spare parts inventory enables rapid cooling system repairs, minimising downtime and preserving the performance and reliability of your engine.
HOWO T7H
Primary Fitment
HOWO A7
Also Compatible
Cooling System
Direct Mount
Direct Replacement
No Modifications
Replacing a cracked, leaking, or degraded expansion tank with the 711W515016070 immediately restores the efficiency and reliability of your cooling system. The new tank provides a secure, leak-free reservoir that maintains proper coolant levels, preventing air ingress and pressure loss that can lead to overheating. The robust construction and high-quality materials ensure that the tank resists cracking, warping, and degradation from coolant additives and thermal cycling, extending the service life of the component. The precise fitment and secure mounting eliminate vibration-related stress on the tank and surrounding components, reducing the risk of future failures. For fleet operators, a reliable expansion tank reduces cooling system breakdowns, lowers maintenance costs, and helps maintain the performance and efficiency of your vehicles. By investing in the 711W515016070, you ensure that your HOWO truck’s cooling system operates at its best, protecting your engine and keeping your business moving.
Installing the 711W515016070 expansion tank is a straightforward procedure. Begin by safely allowing the engine to cool completely, then carefully drain the coolant to a level below the tank. Remove the hoses and overflow tube from the old tank, taking note of their positions. Unbolt the mounting bracket and carefully lift out the old tank. Clean the mounting area and inspect the hoses for wear or damage; replace them if necessary. Install the new tank, ensuring it is securely seated in the mounting bracket, and reconnect the hoses and overflow tube using new clamps. Refill the cooling system with the correct coolant mixture, start the engine, and check for any leaks. Periodically inspect the tank for signs of cracking, discolouration, or leakage during routine maintenance. With proper installation, the 711W515016070 will provide years of reliable coolant management.
Pro Tip: When replacing the expansion tank, it is recommended to also inspect the radiator cap and pressure relief valve for proper operation. The 711W515016070 is designed to work with the OEM-spec cap; ensuring the entire cooling system is in good condition guarantees optimal performance and longevity.
Genuine HOWO components are engineered to the highest standards, and the 711W515016070 expansion tank is no exception. Aftermarket tanks often use inferior plastics, imprecise moulding, or poor sealing designs, leading to premature cracking, leaks, and cooling system failures. HOWO’s tank is manufactured using the same materials and processes as the original equipment, guaranteeing a perfect fit and reliable performance. By choosing the 711W515016070, you benefit from HOWO’s rigorous testing, including pressure cycling, thermal shock, and chemical resistance tests. This ensures that the tank meets the demanding requirements of heavy-duty trucking. Moreover, genuine parts are backed by a comprehensive warranty and supported by HOWO’s global network, giving you confidence in your purchase.
OEM Authentic
Factory Quality
Long Service
Extended Life
Global Standard
Trusted Worldwide
Q: Which vehicles use the 711W515016070 expansion tank?
A: The 711W515016070 is designed for HOWO T7H, A7, and other heavy-duty trucks, as well as many Sinotruk models with the same cooling system configuration.
Q: What are the symptoms of a failing expansion tank?
A: Visible cracks or leaks, low coolant levels, engine overheating, and coolant odour in the engine bay are common indicators of a failing expansion tank.
Q: Does the expansion tank come with the pressure cap?
A: The 711W515016070 includes the tank only. The pressure cap is typically transferred from the old tank or ordered separately. We recommend using a genuine HOWO cap for optimal pressure regulation.
Q: How do I verify the correct part?
A: Check the OEM number on your existing expansion tank. If it matches 711W515016070, this is the exact replacement. Consult your vehicle’s parts manual for additional confirmation.
Order your 711W515016070 HOWO Expansion Tank today! Explore our complete selection of genuine HOWO and Sinotruk cooling system components at Howo/Sitrak truck parts and keep your engine running cool and efficiently.
The 711W515016070 HOWO Expansion Tank from HOWO is a testament to precision engineering and uncompromising quality. By choosing this genuine component, you ensure that your engine’s cooling system delivers the reliability, efficiency, and durability required for modern heavy-duty trucking. Whether you are a professional mechanic or a fleet manager, this expansion tank offers the performance, reliability, and exact fit that you can count on. Trust HOWO – the benchmark for excellence in heavy-duty truck components – and experience the difference that genuine quality makes.
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