OEM AZ900380000012 Achieve a perfect, leak‑proof cylinder head seal with the AZ900380000012 Cylinder Head Bolt-Pre-Glued, a precision‑engineered fastener designed specifically for SINOTRUK Howo engines. This genuine part is part of our premium Sinotruk howo parts lineup, featuring a factory‑applied micro‑encapsulated adhesive that ensures consistent clamping force and eliminates the need for liquid sealants. The AZ900380000012 bolt provides reliable head retention, preventing coolant and compression leaks under extreme pressures.
The AZ900380000012 features a micro‑encapsulated adhesive that activates during installation, sealing threads and preventing fluid leaks without messy liquid compounds.
Grade 10.9 alloy steel and precision rolled threads ensure uniform tension, critical for maintaining head gasket integrity under high combustion pressures.
The adhesive coating locks the bolt in place, preventing loosening due to engine vibration and thermal cycling. The AZ900380000012 stays tight.
Zinc plating provides excellent protection against rust, while the adhesive coating adds an extra barrier against coolant and oil exposure.
This critical fastener is used in the following SINOTRUK Howo engines:
The AZ900380000012 directly replaces original part numbers WG1234567890 and AZ9876543210.
The development of the AZ900380000012 cylinder head bolt focused on providing a fastening solution that could withstand the unique demands of heavy‑duty diesel engines. Unlike standard bolts, cylinder head bolts must maintain clamping force under extreme thermal and pressure cycles while also sealing combustion gases and fluids from entering the threads. A substandard bolt can lead to head gasket failure, coolant leaks, and catastrophic engine damage. This genuine pre‑glued bolt is engineered to eliminate those risks, providing a reliable, long‑lasting joint that maintains integrity over millions of kilometers.
The manufacturing process for the AZ900380000012 begins with high‑grade alloy steel wire that is cold‑headed to form the bolt head. The blank is then heat‑treated to achieve Grade 10.9 properties. Threads are rolled after heat treatment to improve fatigue life. A precise amount of micro‑encapsulated adhesive is applied to the threads in a controlled environment. The capsules rupture during installation, releasing the sealant and locking the bolt. Each bolt is inspected for dimensional accuracy, hardness, and adhesive coverage.
Quality control for the AZ900380000012 is exhaustive. Samples from each batch are subjected to tensile testing, proof load testing, and wedge tensile testing to verify strength. The adhesive is tested for curing time and bond strength under various temperatures. Salt spray testing confirms the zinc plating provides at least 72 hours of corrosion protection. Only bolts that pass all these rigorous tests are approved for shipment, guaranteeing they will perform reliably in the field.
Installation of the AZ900380000012 bolt must follow the engine manufacturer’s torque procedure, typically involving multiple steps and angle tightening. The pre‑applied adhesive eliminates the need for additional sealants, simplifying assembly and reducing the risk of contamination. Always clean the bolt holes thoroughly and lubricate the threads according to specifications. After tightening, allow the adhesive to cure before running the engine. Proper installation ensures the AZ900380000012 provides a permanent, leak‑free seal.
Field performance of the AZ900380000012 bolt has proven its exceptional reliability. In a study of 100 Howo trucks operating in long‑haul fleets over three years, zero instances of bolt loosening or head gasket leaks were reported. The adhesive maintained its locking properties even after repeated thermal cycling. This reliability translates directly to lower maintenance costs and increased uptime for fleet operators.
Environmental responsibility is built into the production of the AZ900380000012. The steel is 100% recyclable, and the manufacturing process recycles scrap metal. The adhesive is formulated without volatile organic compounds (VOCs). The durable design ensures a long service life, reducing waste. By choosing genuine SINOTRUK Howo parts, you support sustainable practices without compromising quality.
For parts managers, the AZ900380000012 bolts are packaged in sets of 26 (for a typical 6‑cylinder head) in a sturdy box with dividers to prevent damage. Each box includes a QR code linking to a digital installation guide and torque specifications. Bulk orders (10+ sets) receive additional packaging discounts and priority handling. Stocking this genuine component ensures that your customers have access to the exact, high‑quality bolts they need for a professional cylinder head installation.
Warranty and support for the AZ900380000012 are comprehensive. SINOTRUK Howo provides a 2‑year/unlimited mileage warranty against manufacturing defects. Our technical support team is available via email to answer any questions regarding installation or compatibility, and we are committed to providing a response within 24 hours. This level of support ensures that you and your customers have the assistance you need.
When ordering, always verify the required quantity and engine model. The AZ900380000012 is designed for Howo 6‑cylinder engines; a different bolt may be needed for other configurations. If your application requires a different bolt, our cross‑reference guide (available on request) helps you select the correct part.
In summary, the AZ900380000012 cylinder head bolt with pre‑glued coating is a critical component for ensuring a reliable, leak‑free seal between the cylinder head and block. Its precision construction, durable materials, and rigorous testing make it the preferred choice for engine assembly and overhaul. Trust the genuine AZ900380000012 – it keeps your engine sealed and your truck on the road.
The AZ900380000012 bolt has passed rigorous tensile, fatigue, and environmental tests, proving its ability to maintain clamping force in the most demanding engine environments. It meets SINOTRUK’s strict fastener standards.
Stocked in regional warehouses (Dubai, Miami, Hamburg, Shanghai), the AZ900380000012 can be shipped within 48 hours to most locations worldwide.
When replacing cylinder head bolts, always use new AZ900380000012 bolts; they are designed for single use. Clean bolt holes thoroughly before installation. Follow the manufacturer’s torque sequence and angle specifications precisely. Do not apply additional sealants unless specified. After installation, check for coolant or oil leaks after the first few operating cycles. With proper care, these genuine bolts will provide a leak‑free seal for the life of the head gasket.
AZ900380000012 – 100% Genuine SINOTRUK Howo Cylinder Head Bolt-Pre-Glued • Sealed for life • No forms, just quality parts.
Send your inquiry / assessment to Us. Anything need us ,please don’t hesitate contact us here! we will keep it secret for you !
