481F-1003010BA

Brand: Chery

Model: A5

Product Name:Cylinder Head

Part Number: 481F-1003010BA

Product Details
Product Introduction: Chery A5 Cylinder Head (Part No.: 481F-1003010BA)
481F-1003010BA is a special cylinder head made just for the Chery A5—it’s a core part of the car’s engine. Think of it as the “top cover” for the engine’s cylinder block: it seals the cylinder to make a closed combustion chamber, and that directly affects how well the engine burns fuel, how much power it puts out, and how it manages heat. This cylinder head follows Chery’s original manufacturing standards exactly, so it’s a great replacement part to keep the Chery A5’s engine running well, use less fuel, and stay reliable.
1. Core Functions & How It Works
Key Functions
  • Seals the Combustion Chamber: It fits tightly over the cylinder block, making a sealed space where fuel and air mix and burn. This stops high-pressure gas from leaking out when burning, so most of the energy turns into engine power—no wasted power.

  • Supports the Valve System: It has built-in parts to hold valves, camshafts, and valve springs. When the engine runs, it keeps the valve system moving steadily, making sure valves open and close at the right time (matching how the engine works).

  • Cools the Engine: The cylinder head has internal channels that connect to the engine’s cooling system. It soaks up heat from combustion and sends it to the coolant, so the engine doesn’t overheat—super important when the engine works hard for a long time.

  • Guides Air/Fuel and Exhaust: It has intake and exhaust ports—intake ports let fuel-air mix into the cylinder, and exhaust ports let waste gas out after burning. The ports are designed to let air flow smoothly, which helps the engine burn fuel better and makes it easier for exhaust to escape.

How It Works
481F-1003010BA is put on top of the Chery A5’s engine cylinder block (sealed with a cylinder head gasket to stop leaks). When the engine runs:
  1. The camshaft (installed in the cylinder head) uses its “lobes” (little bumps) to make valves open and close.

  1. Intake valves open, letting fuel-air mix into the cylinder. Then the mix gets squeezed and ignited in the sealed combustion chamber (made by the cylinder head, cylinder block, and piston).

  1. After burning, exhaust valves open, pushing waste gas out through the exhaust port.

  1. At the same time, coolant flows through the cylinder head’s cooling channels, soaking up heat and keeping the engine at the best temperature (usually 80-90°C).

2. Structure & Material Pros
  • Strong Aluminum Alloy: Made of car-grade aluminum alloy (ADC12)—it conducts heat well and is light. Compared to heavy cast iron cylinder heads, it makes the engine ~30% lighter (so the car uses less fuel) and spreads heat evenly (no hot spots that can damage parts).

  • Smooth, Precise Sealing Surface: The bottom of the cylinder head (where it touches the cylinder block) is polished carefully—its flatness is off by less than 0.05mm. This makes a tight seal with the cylinder head gasket, so coolant or gas doesn’t leak (leaks often cause overheating or lost power).

  • Reinforced Valve Seats: Copper-alloy inserts are pressed into the intake and exhaust ports to hold the valves. They can handle high temps (up to 800°C) and don’t wear out easily from valve impacts, so the cylinder head lasts longer—great for cars that start and stop a lot.

  • Built-In Camshaft Housing: The cylinder head has a built-in spot for the camshaft, so you don’t need an extra camshaft cover. This simplifies the engine, makes assembly easier, and lowers the chance of oil leaking from the camshaft area.

3. Performance Highlights
  • Better Fuel Burning: The combustion chamber’s shape is designed just for the Chery A5’s engine—it makes sure fuel and air mix evenly and burn completely. This gives the engine more power (torque goes up by ~5%) and uses less fuel (saves ~3% compared to a worn-out cylinder head).

  • Steady Heat Control: The well-designed cooling channels keep the cylinder head’s temperature even, so no hot spots that can break valves or gaskets. Even on long uphill drives or hot summer days, the engine stays in the safe temperature range.

  • Long-Lasting: The aluminum alloy and reinforced valve seats can handle high-temperature burning and mechanical friction. With normal use (regular oil changes and checks), 481F-1003010BA can last 150,000-200,000 kilometers.

  • Fits Like the Original: It matches the Chery A5’s engine mounting holes, valve system specs, and cooling system connections exactly. No changes needed when replacing—just put it on with a new original cylinder head gasket, and it works perfectly with the engine.

4. Which Cars It Fits & Installation Tips
Applicable Vehicles
Only fits Chery A5 models with the 481F engine (made between 2007-2012). Before buying, check your Chery A5’s engine model to make sure 481F-1003010BA fits.
Installation Notes
  1. Check Before Installing: Look at the cylinder head’s surface for cracks, scratches, or bends (use a straight tool to test if it’s flat). Use a new original cylinder head gasket—don’t reuse the old one.

  1. Clean Parts: Wipe the top of the cylinder block and the bottom of the cylinder head to remove old gasket bits, oil, or dirt—this makes sure the seal is tight.

  1. Tighten Bolts Correctly: Tighten the cylinder head bolts in the order Chery specifies (usually from the center out) and follow the torque rules (first 25 N·m, then 45 N·m, finally turn 90° more). If you tighten them wrong, the gasket might leak or the cylinder head could bend.

  1. Test After Installing: Add coolant and engine oil, then start the engine to check for leaks (coolant, oil, or exhaust gas). Let the engine idle for 30 minutes to make sure the temperature stays steady (no overheating), then take it for a test drive to make sure the engine has normal power.

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