The injector bush sealing ring is a small but critical component that ensures the integrity of your diesel engine’s fuel system, preventing combustion gas leakage and maintaining optimal injector performance. The 1004257065 Injector Bush Sealing Ring from HOWO is engineered to deliver exceptional sealing performance, superior heat resistance, and a precise factory fit, ensuring that your engine’s injectors operate efficiently and reliably under the most demanding conditions. As a vital Howo/Sitrak truck parts component, this sealing ring is manufactured from high-grade, heat-resistant material with precision-molded geometry, providing outstanding resistance to high temperatures, combustion pressures, and chemical attack. Whether you are performing a full injector service or replacing a worn seal, the 1004257065 guarantees a perfect factory fit, reliable sealing, and extended engine life – making it the trusted choice for professional workshops and fleet operators worldwide.
The injector bush sealing ring provides a critical seal between the injector and the cylinder head, preventing combustion gases from escaping and ensuring that fuel is delivered precisely to the combustion chamber. The 1004257065 is specifically designed to withstand the extreme conditions inside the cylinder head, including high temperatures, fluctuating combustion pressures, and the corrosive effects of fuel and combustion by-products. A worn or degraded sealing ring can lead to compression loss, reduced engine power, increased fuel consumption, and even damage to the injector and cylinder head. HOWO has engineered this sealing ring with a precision-molded, heat-resistant material that maintains its elasticity and sealing force over extended service intervals. The ring’s geometry is optimized to fit perfectly into the injector bore, creating a positive seal that prevents blow-by and ensures efficient combustion. With the 1004257065, you eliminate the risk of combustion gas leakage, protect your injectors, and maintain the performance and reliability of your engine.
Heat Resistant
Withstands 200°C+
Leak‑Proof
Gas‑Tight Seal
OEM Grade
Genuine HOWO
Precision Fit
Exact Match
The 1004257065 injector bush sealing ring is manufactured to the highest OEM standards, incorporating advanced material science and precision engineering. Below are the complete technical specifications for this essential engine sealing component.
| Parameter | Specification | Detail |
|---|---|---|
| OEM Number | 1004257065 | Exact Match |
| Part Name | Injector Bush Sealing Ring | HOWO Genuine |
| Brand | HOWO | Original Equipment |
| Application | HOWO T7H / A7 / MC11/MC13 | Injector sealing |
| Material | High‑grade heat‑resistant compound (FKM/PTFE) | Oil & heat resistant |
| Inner Diameter | 14.5 mm | Precision‑sized |
| Outer Diameter | 18.0 mm | Standard fitment |
| Thickness | 2.5 mm | Optimal sealing |
| Temperature Range | -40°C to +200°C | Extreme duty |
| Pressure Resistance | Up to 150 bar | Combustion pressure |
| Fuel Resistance | Excellent | Prevents swelling |
| Weight | 0.005 kg | Lightweight |
| Warranty | 12 Months | Manufacturer Guarantee |
The 1004257065 injector bush sealing ring is produced using advanced compression molding and precision finishing techniques to ensure exceptional dimensional accuracy and sealing performance. The specialized FKM compound is formulated to provide outstanding resistance to high temperatures and the aggressive chemical attack of diesel fuel and combustion by-products, maintaining its elasticity and sealing ability over extended service intervals. The ring’s cross‑sectional geometry is optimized to provide a positive seal against both the injector body and the cylinder head bore, creating a gas‑tight barrier that prevents blow‑by and maintains combustion pressure. The surface finish is carefully controlled to ensure smooth installation and consistent sealing force. Each ring is inspected for dimensional accuracy, hardness, and surface integrity, guaranteeing that the 1004257065 meets HOWO’s stringent quality standards. This meticulous engineering ensures that your injectors are properly sealed, your engine maintains optimal compression, and your fuel efficiency remains high.
The 1004257065 injector bush sealing ring is specifically designed for HOWO heavy‑duty trucks equipped with MC11 and MC13 engine families, including T7H, A7, and derivative models. It directly replaces the original sealing ring with identical dimensions, ensuring a straightforward installation without modifications. The ring is compatible with all factory‑specified injectors and cylinder heads and works seamlessly with the original equipment sealing system. This sealing ring is also compatible with many Sinotruk and other commercial vehicles that share the same engine architecture. To confirm fitment, always cross‑reference the OEM number on your existing ring with 1004257065. If they match, this component will integrate seamlessly. Keeping these rings in your spare parts inventory ensures that you can quickly address injector sealing issues, minimising downtime and maintaining the performance and reliability of your engine.
HOWO T7H
Primary Fitment
HOWO A7
Also Compatible
MC11/MC13
Engine Series
Direct Replacement
No Modifications
Replacing a worn, hardened, or cracked injector bush sealing ring with the 1004257065 immediately restores the integrity of your engine’s combustion system. The new seal prevents combustion gases from escaping around the injector, maintaining optimal cylinder pressure and improving combustion efficiency. This results in improved engine power, better throttle response, and reduced fuel consumption. The superior sealing performance also prevents combustion gases from contaminating the engine oil, extending the life of the lubricant and protecting critical engine components from soot and acid damage. The ring’s resistance to heat and chemicals ensures that it maintains its sealing properties over time, reducing the risk of blow‑by and the associated loss of performance. For fleet operators, a reliable injector sealing ring reduces the risk of engine performance issues, lowers maintenance costs, and helps maintain the efficiency and reliability of your vehicles. By investing in the 1004257065, you ensure that your HOWO engine delivers the power, efficiency, and reliability that professional drivers and fleet operators depend on.
Installing the 1004257065 injector bush sealing ring requires careful attention to cleanliness and precision. Begin by removing the injector and thoroughly cleaning the injector bore in the cylinder head, removing all carbon deposits and old seal material. Inspect the injector body and the cylinder head bore for any damage or wear that could affect the seal. Lubricate the new sealing ring with a thin film of clean engine oil or assembly lube to prevent damage during installation. Carefully slide the new ring onto the injector, ensuring it is positioned correctly in the groove. Install the injector into the cylinder head, taking care not to displace the ring. Torque the injector hold‑down bolts to the manufacturer’s specification. Start the engine and check for any signs of combustion gas leakage or unusual noises. Periodically inspect the sealing ring during routine maintenance for signs of wear or damage. With proper installation, the 1004257065 will provide years of reliable sealing and engine performance.
Pro Tip: When installing the new injector bush sealing ring, always ensure that the sealing groove is clean and free of debris. The 1004257065 is a precision component; proper cleanliness is essential to ensure a perfect seal and prevent premature failure. Always replace all the sealing rings on an engine as a set when performing injector service.
Genuine HOWO components are engineered to the highest standards, and the 1004257065 injector bush sealing ring is no exception. Aftermarket sealing rings often use inferior rubber compounds that harden, crack, or lose their sealing ability over time, leading to combustion gas leakage, loss of power, and potential engine damage. HOWO’s sealing ring is manufactured using the same materials and processes as the original equipment, guaranteeing a perfect fit and reliable performance. By choosing the 1004257065, you benefit from HOWO’s rigorous testing, including temperature cycling, pressure resistance, and chemical resistance tests. This ensures that the sealing ring 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 1004257065 injector bush sealing ring?
A: The 1004257065 is designed for HOWO T7H, A7, and other models with MC11/MC13 engines, as well as many Sinotruk trucks with the same fuel injection system.
Q: What are the symptoms of a failing injector bush sealing ring?
A: Loss of power, rough idle, increased fuel consumption, black smoke from the exhaust, and a chuffing or hissing sound from the injector area are common indicators.
Q: Can I reuse the old sealing ring?
A: No, the 1004257065 is a single‑use sealing ring. Once removed, it should be replaced with a new one to ensure a proper seal and prevent combustion gas leakage.
Q: How do I verify the correct part?
A: Check the OEM number on your existing ring. If it matches 1004257065, this is the exact replacement. Consult your vehicle’s parts manual for additional confirmation.
Order your 1004257065 Injector Bush Sealing Ring today! Explore our complete selection of genuine HOWO and Sinotruk engine sealing components at Howo/Sitrak truck parts and keep your injectors sealed and your engine performing at its peak.
The 1004257065 Injector Bush Sealing Ring from HOWO is a testament to precision engineering and uncompromising quality. By choosing this genuine component, you ensure that your engine’s injectors are properly sealed, maintaining optimal compression, combustion efficiency, and power output. Whether you are a professional mechanic or a fleet manager, this sealing ring 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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