202V04902-0037 exhaust valve stem oil seal is a critical engine sealing part for Sinotruk natural gas engines based on MAN technology. It seals the gap between valve stem and valve guide, preventing engine oil from entering the combustion chamber and stopping gas leakage from the cylinder head. It maintains stable air-fuel mixing and reduces oil consumption, ideal for engine overhaul on Howo and SITRAK natural gas heavy trucks.

Jinan Henshine Import and Export Co., Ltd. （HENGSY）specializes in truck and construction machinery parts, with over 15 years of experience in the industry. We focus on supplying reliable spare parts and supporting customers with professional solutions for vehicle maintenance and repair. Our products cover engine parts, cab parts, transmission components, axle and chassis parts, electrical components, and construction machinery parts, widely used in commercial vehicles and heavy equipment.

FACTORY APPEARANCE

Our products cover engine parts, cab parts, transmission components, axle and chassis parts, electrical components, and construction machinery parts, widely used in commercial vehicles and heavy equipment.

PACKAGING AND SHIPPING

Customization is fully available via artwork drafts or physical samples. Backed by strict quality control, strong comprehensive processing capacity and thoughtful international trade support, our products have won wide recognition from industrial peers and trading partners worldwide.

SERVE THE WORLD

Years of industry experience, serving the world

Far exceeding500+partners, sales exceeding30countries and regions

Products are sold domestically and exported to Europe, America, Japan, South Korea, Australia, the Middle East, Africa, Southeast Asia, and other countries and regions. Our goal is to sincerely cooperate with domestic and foreign customers, achieve mutual benefit, and establish good business trade relations.

Cananda

USA

Brazil

Spain

South Africa

Germany

Czech

Poland

Algeria

Turkey

Israel

Mozambique

Egypt

Ukraine

Russia

India

Sri Lanka

Korea

Japan

Indonesia

Australia

Argentina

MANY CUSTOMERS CHOOSE US

CUSTOMER REVIEWS

Customer Reviews

We have maintained in‑depth cooperation for many years. Cost‑effective products with stable supply capacity. They are our highly‑trusted Chinese supplier for truck and construction machinery spare parts.

Customer Reviews

The factory implements strict quality control with low defective rate of received goods. The after‑sales team responds quickly once issues are reported and provides practical solutions in time.

Customer Reviews

One‑stop purchasing saves us from the trouble of cooperating with multiple suppliers. A complete range of truck and construction machinery spare parts greatly reduces communication time and overall procurement costs.

FAQ

Q:Rearview mirrors, instrument clusters, and exterior plastic parts are easily damaged during transport. How should they be packaged?

A: Fragile exterior parts such as rearview mirrors, instruments, and exterior casings are reinforced with foam lining and cardboard boxes, and corner protectors are added to important edges and corners; the condition of the goods is photographed before shipment to reduce the risk of damage from bumps and knocks during transportation.

Q: How often should easily worn parts such as rubber hoses, air filters, and seals be replaced?

A: Depending on the driving conditions, if the vehicle is frequently used in dusty environments such as mining areas and construction sites, it is recommended to shorten the replacement cycle; for regular road transport, regular inspections should be carried out according to vehicle maintenance standards, and the vehicle should be replaced immediately if signs of aging, bulging, cracking, air leakage, or increased air intake resistance are found to prevent further malfunctions.

Q:What information is required before ordering parts to ensure accurate matching with your vehicle model?

A: Please provide the accurate vehicle model and original part number first. If no part number is available, please provide the vehicle identification number and note the part name. We will verify the compatibility before arranging shipment to avoid incorrect parts installation and unusable parts.

Q: How do you guarantee the quality of your products?

A:Strict testing is conducted during the production process, and rigorous sampling inspections are carried out before the products leave the factory to ensure that the product packaging is intact.

Q:Sampling time?

A: Existing projects: within 15 days. Customer items: 35 to 45 days.

Q:How can I obtain a sample?

A:We provide free samples from our stock. Samples can be sent to you within 3‑7 days upon receipt of your shipping payment. The sample‑related charges will be credited back to you when you place your subsequent order.

FREE QUOTE

Whether you're inquiring about pricing, exploring our products, visiting our factory, or simply have questions or ideas, feel free to contact us anytime.