Product Description:

Engine Coolant Reservoir Hose
OE NO.: 30792244 31439561

Applicable vehicle type: For VO LVO

Engine Coolant Reservoir Hose (abbreviated as ECRH, also commonly referred to as Coolant Overflow Hose/Reservoir Return Hose) is a core connecting component of the automotive cooling system. It is responsible for enabling bidirectional flow of coolant between the reservoir tank and the main circulation (radiator/engine) when the cooling system undergoes thermal expansion and contraction. This function maintains system liquid level and pressure balance, preventing engine overheating caused by coolant overflow or deficiency.


Core Functions:

• Thermal Expansion Overflow: As the engine operates and temperature rises, the coolant expands, increasing system pressure. Excess coolant flows through the hose into the reservoir tank, preventing the radiator cap from being blown open and causing leakage.
• Cold Contraction Reflux: When the engine stops and cools down, the coolant contracts, creating a negative pressure in the system. Coolant from the reservoir tank flows back through the hose into the main circulation, ensuring the system remains fully filled with coolant and preventing airlocks.
• Pressure Balance: In conjunction with the reservoir tank's vent, it stabilizes system pressure, reducing pressure impact on components such as the water pump and radiator, thereby extending component lifespan.

Multiply Brands Auto Parts We Offer:

Why choice us:

1. Industry Experience: 20 years of experience in the auto parts industry, with in-depth market and product knowledge.

2. Professional Team: A team of experienced experts who can professionally answer all customer inquiries about auto parts.

3. Direct Partnerships: Direct partnerships with multiple auto repair shops, offering first-hand industry feedback and technical support.

4. High-Quality Products: Providing high-quality auto parts to ensure reliability and durability.

5. Comprehensive Inventory: A wide range of product lines and ample inventory to meet diverse customer needs.

6. Quick Response: Offering rapid response services to quickly address customer questions and needs.

7. Customized Services: Providing customized part solutions to meet specific vehicle or customer requirements.

8. Technical Support: Offering professional technical support and installation guidance.

9. After-Sales Service: A strong after-sales service network to ensure customers receive necessary support after product use,If you have any questions after receiving the goods, please contact us in time and we will provide the best solution.

10. Price Advantage:Competitive pricing due to long-standing supply chain relationships.

11. Quality Assurance:All products go through strict quality control processes to meet industry standards.

12. Fast Shipping: Over 500000+ in stock, we can ship them in a short time.

Company Profile:

Beijing Huarui Jietong Trading Co., Ltd. has been engaged in the automotive aftermarket for 20 years and is a professional supplier of auto parts. Located in the capital of China, Beijing, we have factories in Beijing, Guangzhou, and Jiangsu, which enable us to meet our customers' demands for quality and quantity in a timely and efficient manner.



The company primarily focuses on accessories for Land Rover, Jaguar, and Vol vo product series, including Air Conditioning Systems, Braking Systems, Driving Systems, Engine Systems, Cooling Systems, Auto Body Systems, Steering Systems, Suspension Systems, Transmission Systems, and other related parts. Facing the trend of economic globalization, our company is committed to bringing better products and services to the world, providing high-quality products and services for domestic and foreign enterprises and customers.

We welcome any inquiries and look forward to your contact.






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