The bowl plug, also known as a core plug or expansion plug, is a small but critical component that seals the casting holes in the engine block and cylinder head, preventing coolant and oil leaks that can lead to catastrophic engine failure. The 612600040639 Bowl Plug from HOWO is engineered to deliver an exceptional, leak‑proof seal, maintaining the integrity of your engine’s cooling and lubrication passages under extreme pressure and temperature conditions. As a vital Howo/Sitrak truck parts component, this bowl plug is manufactured from high‑quality, corrosion‑resistant steel with precision‑formed dimensions, offering outstanding resistance to thermal cycling, vibration, and chemical attack. Whether you are performing an engine rebuild or replacing a leaking plug, the 612600040639 guarantees a perfect factory fit, reliable sealing, and extended engine life – making it the trusted choice for professional workshops and fleet operators worldwide.
The bowl plug seals the core sand removal ports created during the engine block and cylinder head casting process, ensuring that coolant and oil passages remain sealed and free from leaks. The 612600040639 is specifically designed to withstand the harsh conditions inside the engine – constant exposure to hot coolant, engine oil, pressure fluctuations, and temperature cycling – while providing a reliable, leak‑free seal. A corroded or damaged bowl plug can result in coolant or oil seepage, leading to reduced cooling efficiency, oil contamination, and potential engine failure. HOWO has engineered this bowl plug with a precision‑formed, cup‑shaped design that expands upon installation to create a tight, permanent seal. Its robust steel construction and corrosion‑resistant finish ensure long‑term durability, even in the most demanding environments. With the 612600040639, you can be confident that your engine’s fluid passages remain sealed, protecting your investment and keeping your truck on the road.
Leak‑Proof
Zero Seepage
Heat Resistant
Up to 150°C
OEM Fit
Exact Match
Corrosion Proof
Steel Construction
The 612600040639 bowl plug is manufactured to the highest OEM standards, incorporating advanced materials and precision engineering. Below are the complete technical specifications for this essential engine sealing component.
| Parameter | Specification | Detail |
|---|---|---|
| OEM Number | 612600040639 | Exact Match |
| Part Name | Bowl Plug / 碗形塞 | HOWO Genuine |
| Brand | HOWO / Weichai | Original Equipment |
| Application | HOWO T7H / A7 / MC11/MC13 / WP10/WP12/WP13 | Engine block & cylinder head sealing |
| Material | High‑strength steel | Corrosion‑resistant finish |
| Size | D30 (30 mm diameter) | Precision‑formed |
| Type | Cup‑style / Expansion plug | Self‑sealing design |
| Weight | 0.015 kg | Lightweight |
| Warranty | 12 Months | Manufacturer Guarantee |
The 612600040639 bowl plug is produced using advanced stamping and forming processes to ensure exceptional dimensional accuracy and sealing performance. The high‑strength steel construction provides excellent resistance to deformation and corrosion, maintaining its sealing properties over extended service intervals. The cup‑shaped design is engineered to expand upon installation, creating a tight, permanent interference fit that seals the passage securely. Each plug is manufactured to exacting tolerances, guaranteeing a perfect fit with the engine block or cylinder head bore. This meticulous engineering ensures that your bowl plug remains sealed, your coolant and oil stay contained, and your engine operates reliably, mile after mile.
The 612600040639 bowl plug is specifically designed for HOWO heavy‑duty trucks equipped with MC11 and MC13 engine families, as well as Weichai WP10, WP12, and WP13 engine platforms, including T7H, A7, and derivative models. It directly replaces the original bowl plug with identical size (D30) and sealing characteristics, ensuring a straightforward installation without modifications. The plug is compatible with both cast iron and aluminium engine blocks and works seamlessly with the factory cooling and lubrication systems. This bowl plug 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 plug with 612600040639. If they match, this component will integrate seamlessly. Keeping this plug in your spare parts inventory ensures that you can quickly address coolant or oil leaks, minimising downtime and maintaining the cleanliness and reliability of your engine.
HOWO T7H
Primary Fitment
HOWO A7
Also Compatible
MC11/MC13
Engine Series
Direct Replacement
No Modifications
Replacing a corroded or leaking bowl plug with the 612600040639 immediately eliminates coolant or oil leaks, preventing fluid loss and the risk of engine overheating or lubrication failure. The new seal maintains the integrity of the cooling and oil passages, ensuring that your engine operates at optimal temperatures and with clean, uncontaminated lubricant. The superior sealing performance also prevents dirt and debris from entering the fluid systems, protecting sensitive components from contamination. The durable steel construction and corrosion‑resistant finish ensure that the plug maintains its sealing properties over time, reducing the need for frequent replacements. For fleet operators, a reliable bowl plug reduces fluid consumption, lowers maintenance costs, and helps maintain the cleanliness and reliability of your vehicles. By investing in the 612600040639, you ensure that your HOWO engine remains sealed, protected, and performing at its best, mile after mile.
Installing the 612600040639 bowl plug is a straightforward procedure that requires attention to cleanliness and proper seating. Begin by thoroughly cleaning the bore in the engine block or cylinder head, removing all old sealant, corrosion, and debris. Ensure the bore is dry and free from any contaminants. Apply a thin layer of high‑temperature sealant to the outer edge of the new plug to enhance sealing. Position the plug into the bore with the concave side facing outward (or as per the original orientation). Using a suitable installation tool or a socket of the correct diameter, carefully drive the plug into the bore until it is fully seated and flush with the surrounding surface. Do not over‑drive, as this can distort the plug. After installation, refill the cooling system or oil as required, and check for any leaks. Periodically inspect the plug for signs of corrosion or leakage during routine maintenance. With proper installation, the 612600040639 will provide years of reliable sealing.
Pro Tip: When installing the new bowl plug, always ensure that the bore is clean and free from rust or old sealant. The 612600040639 is designed to create a tight interference fit; a clean bore is essential for optimal sealing and long‑term performance.
Genuine HOWO components are engineered to the highest standards, and the 612600040639 bowl plug is no exception. Aftermarket plugs often use inferior steel, inconsistent dimensions, or poor corrosion protection, leading to premature failure and leaks. HOWO’s plug is manufactured using the same materials and processes as the original equipment, guaranteeing a perfect fit and reliable performance. By choosing the 612600040639, you benefit from HOWO’s rigorous testing, including corrosion resistance and dimensional accuracy checks. This ensures that the plug 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 612600040639 bowl plug?
A: The 612600040639 is designed for HOWO T7H, A7, and other models with MC11/MC13 engines, as well as Weichai WP10/WP12/WP13 engine platforms, and many Sinotruk trucks with the same engine architecture.
Q: What are the symptoms of a failing bowl plug?
A: Coolant or oil leaks from the engine block or cylinder head, low coolant levels, engine overheating, and the smell of coolant or oil are common indicators.
Q: Can I reuse the old bowl plug?
A: No, the 612600040639 is a single‑use plug. Once removed, it may not provide a reliable seal if reused. Always install a new plug when servicing the engine block or cylinder head.
Q: How do I verify the correct part?
A: Check the OEM number on your existing plug. If it matches 612600040639, this is the exact replacement. Consult your vehicle’s parts manual for additional confirmation.
Order your 612600040639 Bowl Plug today! Explore our complete selection of genuine HOWO and Sinotruk engine components at Howo/Sitrak truck parts and keep your engine sealed and protected.
The 612600040639 Bowl Plug from HOWO is a testament to precision engineering and uncompromising quality. By choosing this genuine component, you ensure that your engine’s cooling and lubrication passages remain sealed and protected, preventing costly fluid leaks and maintaining optimal engine performance. Whether you are a professional mechanic or a fleet manager, this bowl plug offers the performance, durability, and exact fit that you can rely on. Trust HOWO – the benchmark for excellence in heavy‑duty truck components – and experience the difference that genuine quality makes.
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