Engine Assembly
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This page explains how Cylinder Head is classified within Motor Vehicle Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.
The top cover of an engine cylinder that seals the combustion chamber and houses valves, spark plugs, and fuel injectors.
Technical details and manufacturing context for Cylinder Head
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Bore Diameter | 70–105 mm | Matches engine displacement and piston size. |
| Compression Ratio | 8.5–11.0 :1 | Affects power output and fuel efficiency. |
| Valve Seat Width | 1.2–2.0 mm | Critical for sealing and heat transfer. |
| Flatness Tolerance | 0.02–0.05 mm | Ensures proper sealing with gasket.ISO 1101 |
| Surface Roughness | 0.8–1.6 μm Ra | Affects gasket sealing and fatigue life.ISO 4287 |
| Operating Temperature | -40–120 °C | Material must withstand thermal cycling. |
| Material Grade | A356-T6 | Aluminum alloy for weight and heat dissipation.ASTM B26 |
| Weight | 8–15 kg | Depends on cylinder count and design. |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
Commonly used trade names and technical identifiers for Cylinder Head.
This component is essential for the following industrial systems and equipment:
| pressure: | Up to 200 bar (combustion pressure), 5-10 bar (coolant pressure) |
| other spec: | Valve lift: 8-12 mm typical, Spark plug torque: 20-30 Nm, Surface flatness: <0.05 mm |
| temperature: | -40°C to 300°C (continuous), up to 500°C (peak combustion) |
Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.
Quoted from the published standard.
1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.
Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.
A practical evidence checklist for RFQ preparation and supplier evaluation.
CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.
Cylinder heads are commonly made from aluminum alloy or cast iron. Aluminum alloy, such as A356-T6, is used for weight reduction and better heat dissipation, while cast iron offers durability and lower cost. The choice depends on the engine design and application.
Key parameters include bore diameter (70–105 mm), compression ratio (8.5–11.0:1), valve seat width (1.2–2.0 mm), flatness tolerance (0.02–0.05 mm per ISO 1101), surface roughness (0.8–1.6 μm Ra per ISO 4287), operating temperature (-40–120 °C), operating pressure (1.0–1.6 MPa), and weight (8–15 kg). These are reference ranges; verify for your specific engine model.
The cylinder head influences combustion efficiency, power output, and fuel economy through its design, including valve sizes, port shapes, and compression ratio. Proper sealing and heat dissipation are critical to prevent overheating and maintain performance.
Signs include coolant leaks, oil contamination, loss of compression, overheating, or excessive exhaust smoke. Warping or cracking can occur due to thermal stress. Regular inspection of flatness and valve seats is recommended.
Editorial classification, named public sources where available, and source-reviewed manufacturer records.
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