The cylinder head gasket is the most critical sealing component in your engine, responsible for containing combustion pressures exceeding 200 bar while maintaining separation between coolant and oil passages. The 612600040646 Cylinder Head Gasket from HOWO is engineered to deliver uncompromising sealing performance, superior thermal stability, and a perfect factory fit, ensuring that your engine delivers maximum power, efficiency, and reliability under the most extreme operating conditions. As a vital Howo/Sitrak truck parts component, this gasket is manufactured using advanced multi-layer steel (MLS) technology with precision-embossed sealing beads and a proprietary elastomer coating, providing exceptional resistance to thermal cycling, pressure pulsation, and chemical attack. Whether you are performing a head gasket replacement or a complete engine overhaul, the 612600040646 guarantees a flawless factory seal, consistent clamping force, and extended engine life – making it the trusted choice for professional workshops and fleet operators worldwide.
The cylinder head gasket performs a vital function that directly impacts engine performance, longevity, and safety. The 612600040646 is specifically designed for HOWO MC11 and MC13 engine families, sealing the combustion chambers, oil galleries, and coolant passages with absolute precision. A compromised gasket can lead to compression loss, coolant contamination, engine overheating, and catastrophic failure. HOWO has engineered this gasket using multi-layer steel technology, featuring a robust carrier layer, a spring steel functional layer, and a compliant stopper layer that ensures consistent sealing pressure across the entire cylinder bore circumference. The precision-embossed sealing beads are computer-optimised to compensate for minor surface irregularities, ensuring a gas-tight seal even under extreme thermal expansion and contraction. With the 612600040646, you restore the original engine integrity, protect your cylinder head and block from warping, and ensure that your engine delivers the power, efficiency, and emissions compliance that modern heavy-duty trucking demands.
Extreme Pressure
Seals >200 bar
Heat Resistant
Up to 300°C
OEM Grade
Genuine HOWO
MLS Tech
Multi-Layer Steel
The 612600040646 cylinder head gasket 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 | 612600040646 | Exact Match |
| Part Name | Cylinder Head Gasket | HOWO Genuine |
| Brand | HOWO | Original Equipment |
| Application | HOWO T7H / A7 / MC11/MC13 | Engine sealing |
| Technology | Multi-Layer Steel (MLS) | With elastomer coating |
| Thickness (Compressed) | 1.6 mm | Precision controlled |
| Temperature Range | -40°C to +300°C | Extreme duty |
| Sealing Pressure | Up to 250 bar (peak) | Combustion chamber |
| Surface Coating | Elastomer / graphite | Micro-sealing |
| Weight | 0.45 kg | Complete |
| Warranty | 12 Months | Manufacturer Guarantee |
The 612600040646 cylinder head gasket is produced using advanced manufacturing techniques, including precision stamping, laser welding, and automated coating application. The multi-layer steel construction consists of a stainless steel carrier layer that provides structural rigidity, a spring steel functional layer that maintains sealing pressure under thermal expansion, and a compliant stopper layer that prevents over-compression of the combustion seal. The precision-embossed sealing beads are formed using state-of-the-art computer-controlled presses, ensuring consistent geometry and sealing force across the entire gasket surface. The elastomer coating is applied to both sides to fill microscopic surface imperfections on the cylinder head and block, providing an additional micro-sealing barrier. Each gasket is inspected for thickness, bead height, and coating uniformity, guaranteeing that the 612600040646 meets HOWO’s stringent quality standards. This meticulous engineering ensures that your cylinder head gasket delivers a reliable, leak-free seal, enabling your engine to operate at peak efficiency and power output.
The 612600040646 cylinder head gasket 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 gasket with identical thickness, sealing geometry, and bore size, ensuring a straightforward installation without modifications. The gasket is compatible with all factory-specified cylinder heads and blocks, and it works seamlessly with the original equipment head bolts and tightening procedures. This cylinder head gasket 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 gasket with 612600040646. If they match, this component will integrate seamlessly. Keeping this gasket in your spare parts inventory enables rapid engine repairs, minimising downtime and preserving 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, blown, or degraded cylinder head gasket with the 612600040646 immediately restores the sealing integrity and performance of your engine. The advanced MLS technology and precision-embossed beads provide a superior seal that prevents combustion gas leakage, coolant mixing, and oil contamination. This ensures that each cylinder develops maximum compression, resulting in improved power output, better fuel economy, and reduced emissions. The consistent clamping force and thermal stability also protect the cylinder head and block from warping, extending the service life of both components. The elastomer coating provides an additional layer of protection against micro-leaks, enhancing long-term reliability. For fleet operators, a reliable cylinder head gasket reduces the risk of catastrophic engine failures, lowers maintenance costs, and helps maintain the performance and efficiency of your vehicles. By investing in the 612600040646, you ensure that your HOWO engine delivers the power, reliability, and durability that professional drivers and fleet managers depend on.
Installing the 612600040646 cylinder head gasket requires precision and meticulous preparation. Begin by thoroughly cleaning the cylinder head and engine block mating surfaces, removing all old gasket material, carbon deposits, and oil residue. Inspect both surfaces for flatness using a straight edge and feeler gauge; if warped beyond specification, have them machined. Ensure that the new gasket is handled with care, avoiding creases or damage to the sealing beads. Position the gasket onto the engine block, aligning all bolt holes and coolant passages with the corresponding openings. Apply a thin layer of assembly lube to the cylinder head bolts and install them in the correct sequence and torque stages, following the manufacturer’s yield-to-torque specifications. After initial torque, perform the angular tightening stages using an angle gauge. Re-torque the bolts after the engine has reached operating temperature and cooled down, as specified in the service manual. Periodically inspect the gasket for signs of leakage during routine maintenance. With proper installation, the 612600040646 will provide years of reliable sealing.
Pro Tip: When replacing the cylinder head gasket, always use new cylinder head bolts. The 612600040646 is designed to work with the correct clamping force; using new bolts ensures consistent torque retention and prevents premature gasket failure.
Genuine HOWO components are engineered to the highest standards, and the 612600040646 cylinder head gasket is no exception. Aftermarket gaskets often use inferior materials, inconsistent thickness, or imprecise bead geometry, leading to leaks, premature failure, and potential engine damage. HOWO’s gasket is manufactured using the same materials and processes as the original equipment, guaranteeing a perfect fit and reliable performance. By choosing the 612600040646, you benefit from HOWO’s rigorous testing, including thermal cycling, pressure pulsation, and corrosion resistance tests. This ensures that the gasket 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 612600040646 cylinder head gasket?
A: The 612600040646 is designed for HOWO T7H, A7, and other models with MC11/MC13 engines, as well as many Sinotruk trucks with the same engine architecture.
Q: What are the symptoms of a failing cylinder head gasket?
A: Engine overheating, white smoke from the exhaust, coolant loss without visible leaks, oil contamination (milky residue), and loss of power are common indicators.
Q: Can I reuse the old cylinder head gasket?
A: No, the 612600040646 is a single‑use gasket. Once compressed, it cannot provide a reliable seal if reused. Always install a new gasket when servicing the cylinder head.
Q: How do I verify the correct part?
A: Check the OEM number on your existing gasket. If it matches 612600040646, this is the exact replacement. Consult your vehicle’s parts manual for additional confirmation.
Order your 612600040646 Cylinder Head Gasket today! Explore our complete selection of genuine HOWO and Sinotruk engine components at Howo/Sitrak truck parts and keep your engine sealed for maximum performance.
The 612600040646 Cylinder Head Gasket from HOWO is a testament to precision engineering and uncompromising quality. By choosing this genuine component, you ensure that your engine’s sealing system delivers the reliability, durability, and performance required for modern heavy-duty trucking. Whether you are a professional engine builder or a fleet manager, this gasket 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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