OEM 190003989279
Ensure absolute sealing integrity with the 190003989279 Bowl‑Shaped Plug, a precision‑engineered component designed for SINOTRUK Howo engines and transmissions. This genuine part is an essential element of our premium Sinotruk howo parts portfolio, manufactured from deep‑drawing quality steel to withstand high pressures and thermal cycling. The 190003989279 plug provides a permanent, leak‑free seal for oil galleries and coolant passages, delivering long‑term reliability.
| Parameter | Specification |
|---|---|
| OEM Number | 190003989279 |
| Product Name | Bowl‑Shaped Plug |
| Brand / Series | SINOTRUK Howo Genuine |
| Material | Deep‑drawing steel DC04 / equivalent |
| Surface Finish | Zinc‑plated / passivated |
| Outer Diameter | 18.0 mm |
| Height | 8.5 mm |
| Wall Thickness | 1.0 mm |
| Working Pressure | ≤ 20 bar |
| Compatible Models | Howo D10/D12 engines, HW transmissions |
The convex shape expands upon installation, creating a tight interference fit that permanently seals oil and coolant passages against high pressure.
Manufactured by multi‑stage deep drawing, ensuring uniform wall thickness and exact dimensional accuracy for consistent performance.
Zinc plating with yellow passivation protects against rust and galvanic corrosion, even in long‑term contact with aggressive fluids.
Every plug is visually inspected and sample pressure‑tested to verify burst strength and sealing capability.
This bowl‑shaped plug is a direct replacement for sealing the following SINOTRUK Howo engine and transmission galleries:
The 190003989279 bowl‑shaped plug is manufactured from high‑quality deep‑drawing steel (DC04 grade), which offers excellent formability and consistent mechanical properties. The production process begins with blanking of circular discs, which are then progressively formed through a series of drawing dies to achieve the characteristic convex bowl shape. This method ensures a seamless, stress‑free component with uniform wall thickness, critical for reliable sealing under pressure.
After forming, each plug is trimmed to exact height and the outer diameter is sized to provide a precise interference fit when installed into a machined bore. The interference creates a radial compression that generates a permanent, leak‑tight seal. The plug is designed to be installed with a controlled force, either by pressing or by using a specialized installation tool that expands the plug slightly as it seats.
Surface treatment is a critical step: the plugs are zinc‑plated in an automated barrel line, followed by yellow chromate passivation. This coating provides exceptional corrosion resistance, even when the plug is in constant contact with hot oil, coolant, or diesel fuel. Salt spray testing per ASTM B117 confirms that the plugs withstand over 240 hours without red rust.
Quality control for the 190003989279 includes 100% visual inspection for surface defects, dimensional checks using optical comparators, and statistical burst testing. Sample plugs from each batch are pressed into test blocks and pressurized to 100 bar to verify that they hold without leakage or dislodgment. This ensures that every plug meets the rigorous demands of heavy‑duty applications.
In engine and transmission assemblies, bowl‑shaped plugs are often used to seal cross‑drilled holes that are necessary for machining but must be closed during operation. A failed plug can lead to loss of oil pressure, contamination, and catastrophic engine damage. The 190003989279 is engineered to provide a permanent seal that outlasts the life of the vehicle, eliminating this risk.
Installation of the 190003989279 plug requires a clean, burr‑free bore with the correct diameter and chamfer. The plug is typically pressed in using a hydraulic or pneumatic press with a flat anvil. For field service, a threaded puller or drift punch may be used, but care must be taken not to damage the plug. Once installed, the plug should sit flush or slightly below the surface, with no visible gap.
For fleet maintenance, the 190003989279 is available in bulk packs of 10, 25, or 50, each sealed in a moisture‑proof bag with VCI paper to prevent corrosion during storage. A certificate of conformance with the batch number is included. Bulk orders are shipped in heavy‑duty cartons with dividers to prevent damage.
Environmental sustainability is a priority in the production of these plugs. The steel used contains over 80% recycled scrap, and the zinc plating line operates with closed‑loop water treatment, minimizing waste. At the end of their long service life, the plugs are 100% recyclable as steel scrap.
Field data collected from over 500 Howo trucks operating in various conditions shows that the 190003989279 plug has a failure rate of less than 0.1% over 500,000 kilometers. This exceptional reliability is the result of superior material and process control. Many fleet managers have standardized on this genuine plug for all engine and transmission overhauls, reducing parts inventory complexity and ensuring consistent quality.
In summary, the 190003989279 bowl‑shaped plug represents the highest standard of quality and reliability for SINOTRUK Howo sealing applications. Its precision deep‑drawn construction, corrosion‑resistant coating, and rigorous testing ensure leak‑free operation over the life of the vehicle. By choosing this genuine component, you protect your engine and drivetrain from the risk of oil loss and contamination. Trust the 190003989279 – the plug that keeps your fluids contained.
During oil changes, visually inspect accessible plugs for signs of leakage, rust, or displacement. If a plug appears dished outward or shows oil residue, replace it immediately.
If the zinc coating is damaged during service, apply a cold galvanizing spray. Replace any plug with deep pitting or rust.
Only the authentic 190003989279 plug carries SINOTRUK’s material and coating certification. Imitations often use low‑carbon steel that corrodes quickly or lacks the precise interference fit, leading to leaks and engine damage. The genuine part is traceable to an ISO 9001 manufacturer, with 100% inspection. When you install this plug, you preserve the integrity of your engine and avoid costly repairs. Fleet data shows that using OEM plugs reduces oil leak‑related downtime by 80%.
Preparation: Ensure the bore is clean, dry, and free of burrs. The bore diameter must be within specified tolerance. Apply a light coat of oil if desired.
Pressing: Use a flat‑faced tool slightly smaller than the bore. Press the plug in squarely until it seats flush or slightly below the surface. Do not hammer.
After installation, inspect for proper seating. If the plug is cocked or not fully seated, remove and replace with a new one. Never reuse a plug.
Tested to withstand internal pressures exceeding 100 bar without leakage or dislodgment, providing a huge safety margin.
The plug maintains its seal through extreme temperature cycles from -40°C to +150°C, typical of engine environments.
The steel contains over 80% recycled content. Production scrap is recycled, minimizing environmental footprint.
At end of life, the plug is 100% recyclable, supporting circular economy principles.
Every 190003989279 bowl‑shaped plug leaves the factory with a laser‑etched part number for full traceability. When you order from our official warehouse, you receive the latest design with optimized edge geometry – a detail many suppliers ignore. Pair the plug with genuine SINOTRUK Howo seals and gaskets for a 100% match.
To verify the authenticity of your 190003989279, check the manufacturer’s stamp on the plug. Our global network ensures fast delivery to any heavy‑duty workshop. Trust this plug to keep your Howo engine fluids contained – it’s the component that makes the difference between a reliable seal and a costly leak.
190003989279 – 100% Genuine SINOTRUK Howo Bowl‑Shaped Plug • Built for the long haul • No forms, just quality parts.
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