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The 6105QA-1003019A injector copper sleeve is a genuine SINOTRUK HOWO component engineered to provide a gas‑tight seal between the fuel injector and the cylinder head in heavy‑duty diesel engines. As a critical element of the trusted Sinotruk howo parts family, this sleeve prevents combustion gases from escaping and coolant from entering the combustion chamber, ensuring optimal engine performance and longevity. Manufactured from high‑purity copper with precision‑machined sealing surfaces, the 6105QA-1003019A sleeve withstands extreme thermal cycling and combustion pressures while maintaining a perfect seal. Its soft copper material conforms to minor surface irregularities, providing reliable sealing without the need for excessive clamping force.
Injector Copper Sleeve
Медная втулка форсунки
Casquillo de cobre del inyector
The 6105QA-1003019A sleeve is precision‑machined from high‑purity oxygen‑free copper (C11000), which offers excellent thermal conductivity and ductility. This material allows the sleeve to deform slightly under clamping pressure, creating a perfect seal against both the injector body and the cylinder head counterbore. The sleeve is annealed to the correct softness, ensuring it conforms to microscopic surface imperfections without cracking. The inner diameter is honed to a smooth finish to prevent injector binding during installation.
Each 6105QA-1003019A sleeve is 100% inspected for dimensional accuracy, including wall thickness, roundness, and surface finish. The chamfered edges facilitate easy installation and prevent damage to the cylinder head during insertion. The sleeve is also tested for hardness to ensure it meets the specified annealed condition. This meticulous quality control guarantees reliable sealing under the extreme pressures (up to 2000 bar) and temperatures found in modern common‑rail diesel engines.
The table below provides detailed technical data for the genuine SINOTRUK HOWO 6105QA-1003019A injector copper sleeve. These specifications are essential for verifying compatibility and understanding its performance capabilities.
| Parameter | Specification | Details |
|---|---|---|
| OEM Part Number | 6105QA-1003019A | SINOTRUK HOWO Original Code |
| Product Name | Injector Copper Sleeve | For unit injector or common rail |
| Material | Oxygen‑free copper C11000 | 99.9% Cu, annealed |
| Outer Diameter | 21.0 mm | Fits cylinder head bore |
| Inner Diameter | 17.0 mm | Clearance for injector body |
| Height (length) | 15.5 mm | Precision ground ends |
| Wall Thickness | 2.0 mm (nominal) | Uniform within 0.05 mm |
| Hardness (HV) | 45‑55 HV (annealed) | Optimized for sealing |
| Surface Roughness (Ra) | ≤ 1.6 µm | On sealing faces |
| Operating Temperature | -40°C to +300°C | Suitable for diesel combustion |
| Applicable Engines | WD615, MC11, MC13, D10 series | Verify injector type |
| Quantity per Engine | 6 (for 6‑cylinder) | One per injector |
The 6105QA-1003019A injector copper sleeve is a direct OEM replacement used in Howo engines equipped with unit injectors or common‑rail injectors that require a copper sealing sleeve. It is commonly found in the WD615 series (Euro‑2 to Euro‑5), as well as the MC11 and MC13 engines used in T7H and C7H trucks. The sleeve sits in a counterbore in the cylinder head, and the injector clamping force compresses the sleeve, creating a seal that isolates the combustion chamber from the coolant passages and the external environment.
A leaking injector sleeve can lead to compression loss, white smoke from unburned fuel, and coolant contamination of the engine oil. Using the genuine 6105QA-1003019A sleeve ensures that the injector is correctly sealed, maintaining compression pressure and preventing dilution of lubricating oil. This is especially critical in heavy‑duty applications such as mining and long‑haul transport, where engine reliability is paramount. The sleeve is also used in some natural gas engines that employ similar injector mounting arrangements.
When replacing injector sleeves, always clean the cylinder head counterbore thoroughly. Use a sleeve driver tool to install the new sleeve squarely. After installation, perform a leak test before refitting the injector.
Correct installation of the 6105QA-1003019A sleeve is essential to ensure a leak‑free seal. Follow these steps:
Remove the old sleeve using a suitable puller tool. Clean the counterbore with a non‑abrasive brush and solvent. Inspect the bore for cracks or corrosion; if damaged, the cylinder head must be repaired.
Apply a thin film of clean engine oil to the outer surface of the new sleeve. Using a proper driver tool, press the sleeve into the bore until it bottoms out. Ensure the sleeve is seated squarely and not cocked.
After installation, perform a pressure test of the coolant system to verify no leaks. Install the injector with a new O‑ring and tighten to the specified torque.
A failed injector sleeve can cause performance issues and potential engine damage. Common signs that replacement is needed include:
If any of these symptoms are observed, immediate replacement with a genuine 6105QA-1003019A sleeve is recommended. Continuing to operate with a leaking sleeve can lead to hydrolock, bent connecting rods, or catastrophic engine failure.
The soft copper conforms perfectly to mating surfaces, preventing blow‑by and maintaining full compression pressure for optimal power and fuel economy.
By sealing the injector bore, the sleeve prevents coolant from entering the cylinder, protecting the engine from hydrolock and oil dilution.
High‑purity copper and precise annealing ensure the sleeve maintains its sealing properties for hundreds of thousands of kilometers, reducing maintenance intervals.
To maximize the service life of your 6105QA-1003019A injector sleeve, follow these best practices:
By adhering to these guidelines, you ensure that the 6105QA-1003019A sleeve performs optimally throughout its intended service interval.
Aftermarket injector sleeves are often made from lower‑grade copper with incorrect hardness, leading to poor sealing or cracking under thermal stress. They may have inaccurate dimensions, causing injector misalignment and premature wear. The genuine 6105QA-1003019A is manufactured to the exact specifications of the original equipment, using certified oxygen‑free copper and precisely controlled annealing. Each sleeve is measured for wall thickness and roundness, guaranteeing a perfect fit and reliable seal.
By choosing authentic SINOTRUK HOWO parts, you protect your investment and ensure your truck maintains its performance and resale value. The Sinotruk howo parts catalog includes a full range of fuel system and engine components engineered for maximum durability. For fleet managers and owner‑operators who demand the best, the genuine 6105QA-1003019A is the only responsible choice.
The 6105QA-1003019A injector sleeve is used across a wide range of Howo models: T7H, A7, and classic Howo‑7 series equipped with WD615, MC11, MC13, and D10 engines. It fits both Bosch and Delphi injector types with a 17 mm body diameter. Always verify the injector type and cylinder head part number using the service manual.
Each 6105QA-1003019A is individually sealed in a plastic bag with anti‑corrosion paper. The package includes one sleeve and a small sachet of assembly lubricant. For bulk orders, sleeves are supplied in sets of six in a labeled carton with batch traceability.
Production of the 6105QA-1003019A takes place in IATF 16949 certified facilities, using precision CNC turning and annealing furnaces with strict temperature control. Statistical process control ensures that dimensional variations are kept to a minimum, far exceeding the requirements of the original design. Every batch is accompanied by a material certificate and hardness test report, guaranteeing that the sleeves delivered are identical to those fitted on new Howo trucks at the factory.
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