Product Parameters
| Item | Specification |
|---|---|
| Material | Cast Iron (Class 35, 40), Aluminum (A356-T6) |
| Manufacturing | Sand Casting, Die Casting, CNC Machining |
| Configuration | Inline, V-type, Flat/Boxer |
| Cylinder Range | 2 – 12 cylinders |
| Application | Automotive, motorcycle, industrial engines |
| MOQ | 5 pcs |
description
Engine cylinder blocks contain the cylinders where pistons reciprocate - the block is the structural backbone of the engine, carrying the crankshaft main bearings, holding coolant passages, and providing the mounting for the cylinder head. The block must be stiff enough to maintain piston-to-cylinder clearance through thermal cycling and mechanical loading. Cast iron blocks dominate in heavy-duty and performance applications - the iron provides the stiffness, the damping characteristics reduce vibration, and the cast iron cylinder bores wear better than sleeve inserts. Aluminum blocks are lighter and dissipate heat faster, which is why they dominate in motorcycle and performance automotive applications.
Coolant Jacket Design and Cooling Uniformity
The coolant jacket is not just a passage for coolant to flow through - its geometry determines how evenly the cylinder walls cool. If one area of the cylinder runs hotter than another, thermal expansion is uneven, which causes piston slap and cylinder ovalization over time. Good jacket design keeps cylinder wall temperatures uniform across the entire firing surface.
FAQ
Q1: MOQ?
A1: 5 pieces for engine block castings.
Q2: Materials?
A2: Cast iron Class 35/40 for heavy-duty. A356-T6 aluminum for lightweight applications.
Q3: Configurations?
A3: Inline, V-type, flat/boxer engines.
Q4: Manufacturing methods?
A4: Sand casting (flexible), die casting (high volume, smooth surfaces), CNC machining.
Q5: Custom configurations?
A5: Yes. Custom bore sizes, stroke lengths, main bearing sizes.
Q6: Testing available?
A6: Pressure testing of coolant and oil passages. Magnaflux for crack detection.
Quality is non-negotiable in precision manufacturing. Every component undergoes rigorous inspection at each stage of production.
- IATF 16949 - Automotive quality management system for safety-critical components
- PPAP / PPF - Production Part Approval Process documentation available on request
- AIAG Core Tools - APQP, FMEA, SPC, and MSA documentation on demand
- Passivation / Electropolishing - ASTM A967 procedures for corrosion resistance
- Material Traceability - Heat number tracking from raw material to finished part
From raw material to finished product, every step is controlled and documented:
- Material Preparation - CNC turning/milling to near-net shape
- Heat Treatment - Through-hardening or case-hardening for strength-critical parts
- Surface Preparation - Degreasing, acid cleaning, and surface activation
- Electroplating - Controlled bath process with thickness monitoring
- Sealing / Baking - Chrome sealing, anodize sealing, or hydrogen embrittlement relief baking
- Inspection - Coating thickness measurement, adhesion testing, and visual check
- Packaging - Protective interleaving, VCI packaging, and anti-tarnish wrapping
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