474Z-10-220T
Brand: Haima
Model: S5
Product Name：Valve house
Part Number: 474Z-10-220T
Product Details
Comprehensive Professional Description: Haima S5 Valve House (Part No. 474Z-10-220T)
1. Basic Overview & Core Functional Positioning
The 474Z-10-220T is an authentic Original Equipment Manufacturer (OEM) valve house, meticulously engineered and exclusively produced for the Haima S5, a compact SUV renowned for its dynamic performance, fuel efficiency, and versatility under the Haima Automobile brand. As a critical core component of the vehicle’s engine valve train system, this valve house serves as a centralized mounting and guiding hub for the engine’s intake and exhaust valves, valve springs, and related actuating components. Its primary function is to ensure precise alignment, smooth operation, and reliable sealing of the valves, directly governing the engine’s air-fuel mixture intake and exhaust gas discharge processes—two fundamental operations that determine the engine’s power output, fuel economy, and emission performance. The part number 474Z-10-220T acts as a unique identifier, guaranteeing strict compliance with Haima’s original engineering specifications, material standards, and performance requirements, making it the only authorized replacement for the valve house of all Haima S5 production years and engine variants.
For Haima S5 owners and professional automotive repair technicians, the reliability and precision of the 474Z-10-220T valve house are non-negotiable. The engine valve train system operates under extreme conditions—high temperatures (up to 200°C in the valve area), high-frequency reciprocating motion (up to thousands of cycles per minute), and constant mechanical stress. A faulty or worn valve house can lead to severe engine malfunctions, including valve misalignment, poor sealing, excessive valve noise, reduced engine power, increased fuel consumption, and even engine stalling or damage. As a genuine OEM component, the 474Z-10-220T is manufactured in strict accordance with Haima’s rigorous quality control standards, international automotive component regulations (including ISO 9001 and IATF 16949), and the precise technical parameters of the Haima S5’s engine (including 1.5T turbocharged and 1.6L naturally aspirated variants). This ensures consistent performance, perfect fitment, and long-term reliability, making it the preferred choice for maintaining the Haima S5’s engine in factory-grade condition.
Unlike generic aftermarket valve houses, the 474Z-10-220T is tailor-made for the Haima S5’s specific engine configuration, including valve spacing, spring load specifications, and mounting dimensions. This customization eliminates compatibility issues, ensuring seamless integration with the vehicle’s existing valve train components—valves, valve guides, valve springs, camshaft, and rocker arms. Whether replacing a worn valve house due to normal wear and tear, or a damaged one due to improper maintenance, overheating, or mechanical impact, the 474Z-10-220T can restore the Haima S5’s engine valve train to its original performance, ensuring optimal engine operation and extending the engine’s service life. It is a critical component that directly impacts the vehicle’s overall reliability and driving experience.
2. Premium Material Selection & Precision Manufacturing Process
The 474Z-10-220T valve house is crafted from high-performance, automotive-grade materials, selected specifically to meet the strict requirements of a critical engine component—prioritizing high-temperature resistance, wear resistance, structural rigidity, and dimensional stability. The material selection is optimized to balance performance, durability, and cost-effectiveness, ensuring the valve house can withstand the harsh operating environment of the engine (including extreme temperature fluctuations, constant mechanical friction, and exposure to engine oil and combustion by-products) while delivering consistent, long-term reliability.
The core material of the 474Z-10-220T valve house is high-quality aluminum alloy (Grade A356), a material widely recognized in the automotive industry for its exceptional combination of light weight, high structural strength, and excellent thermal conductivity. Aluminum alloy A356 offers superior heat dissipation capabilities, which is critical for the valve house—an component that is in direct contact with the engine’s combustion chamber and must efficiently dissipate the heat generated during engine operation. This prevents overheating, which can cause material deformation, valve misalignment, and poor sealing. Additionally, aluminum alloy A356 has excellent wear resistance and corrosion resistance, ensuring the valve house maintains its structural integrity and dimensional accuracy even after prolonged exposure to engine oil, fuel, and combustion gases. The material also exhibits good machinability, allowing for precise manufacturing of complex internal and external structures.
To further enhance the performance and durability of the 474Z-10-220T, the valve house undergoes a series of specialized surface treatments. The external surface is treated with anodic oxidation, a process that forms a hard, corrosion-resistant oxide layer on the aluminum surface. This layer prevents rust, oxidation, and damage from engine chemicals, extending the valve house’s service life and maintaining its structural stability. The internal valve guide bores (the areas where the valves slide) are precision honed and coated with a wear-resistant ceramic layer, which reduces friction between the valve stems and the valve house, minimizing wear and ensuring smooth valve movement. This coating also enhances the sealing performance of the valve guide, preventing oil leakage and ensuring efficient engine operation.
The manufacturing process of the 474Z-10-220T valve house follows a strict, ISO 9001 and IATF 16949 certified production workflow, combining precision casting, automated machining, and rigorous quality control—consistent with modern automotive engine component manufacturing standards. The production process begins with the preparation of raw materials: high-purity aluminum alloy A356 is melted in a controlled environment to ensure uniform composition and avoid impurities, which could compromise the valve house’s structural strength and performance. The molten aluminum is then poured into precision-designed sand molds using a gravity casting process, which ensures the valve house’s basic shape, dimensions, and internal structure meet Haima’s OEM specifications exactly.
After casting, the valve house undergoes a heat treatment process (solution heat treatment and aging), which optimizes the material’s microstructure, enhancing its hardness, strength, and dimensional stability. This heat treatment process also eliminates internal stresses generated during casting, preventing the valve house from deforming during use. Following heat treatment, the valve house undergoes a series of precision machining steps. The external surfaces are machined using high-precision CNC milling machines, ensuring uniform dimensions and a smooth finish. The internal valve guide bores are precision honed to achieve a strict dimensional tolerance (±0.005 mm) and surface roughness (Ra 0.4-0.8 μm), which is critical for proper valve alignment and smooth movement. The mounting holes and bolt holes are drilled and tapped with automated equipment, ensuring precise alignment and dimensional accuracy—critical for proper fitment with the Haima S5’s engine cylinder head.
After machining, each 474Z-10-220T valve house undergoes a series of rigorous quality inspections, including dimensional accuracy testing, hardness testing, surface roughness testing, leak testing, and visual inspection. Dimensional accuracy testing verifies that the valve house’s overall dimensions, valve guide bore diameter, mounting hole spacing, and other key parameters match Haima’s OEM specifications. Hardness testing confirms that the material’s hardness meets the required standard (HB 80-100), ensuring wear resistance and structural strength. Leak testing ensures that the valve guide bores and mounting surfaces are free of leaks, which could lead to oil leakage and engine damage. Only units that pass all inspections are packaged and delivered, guaranteeing that each 474Z-10-220T valve house meets Haima’s OEM standards and provides reliable performance. Additionally, the valve house comes with a 12-month quality guarantee, reflecting the manufacturer’s confidence in its durability and reliability.
3. Structural Design & Key Integrated Components
The 474Z-10-220T valve house features a sophisticated, integrated structural design, meticulously engineered to match the Haima S5’s engine valve train system, ensuring seamless integration, secure attachment, and optimal performance. Its design is optimized to balance functionality, durability, and heat dissipation, while adhering to Haima’s original engineering standards and international safety regulations. The overall structure of the valve house consists of a main body, valve guide bores, valve spring seats, mounting flanges, bolt holes, and oil passages—all working together to ensure precise valve alignment, smooth operation, and reliable sealing.
The main body of the 474Z-10-220T valve house is a compact, lightweight structure, designed to fit perfectly on the Haima S5’s engine cylinder head. It is engineered with a ribbed design, which enhances structural rigidity and heat dissipation without increasing weight. The ribbed structure distributes mechanical stress evenly across the valve house, preventing deformation under high-temperature and high-pressure conditions. The main body is also designed with a smooth external surface, which reduces air resistance within the engine compartment and facilitates heat dissipation.
The valve guide bores are the core functional components of the 474Z-10-220T valve house, designed to guide the intake and exhaust valves during their reciprocating motion. The valve house features a total of 16 valve guide bores (8 for intake valves and 8 for exhaust valves), arranged in a precise pattern that matches the Haima S5’s engine cylinder configuration. Each valve guide bore is precision honed and coated with a wear-resistant ceramic layer, ensuring a tight, smooth fit with the valve stems. The bores have a strict dimensional tolerance, which prevents valve wobble and ensures precise valve alignment—critical for proper sealing of the combustion chamber. The depth and diameter of each bore are tailored to the Haima S5’s valve specifications, ensuring optimal valve lift and movement.
The valve spring seats are integrated into the top of the valve house, designed to support and position the valve springs. Each valve spring seat is precision machined to a smooth, flat surface, ensuring uniform spring load distribution and preventing spring misalignment. The seats are also designed with a slight recess, which securely holds the valve springs in place, preventing them from slipping during engine operation. The valve spring seats are made of high-hardness steel, which offers superior wear resistance and durability, ensuring they can withstand the constant pressure and vibration of the valve springs.
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