2. Engine Block and Cylinder Head Marking

What it is: Engine blocks and cylinder heads require casting numbers, serial numbers, date codes, and manufacturing identifiers.

How lasers are used:

• Deep-engraved serial numbers (0.2–0.5mm depth) on cast iron or aluminum
• 2D DataMatrix codes for full traceability
• Typically 30–50W fiber lasers for the deep engraving required on rough cast surfaces

Challenges:

• Rough as-cast surfaces require more power for readable marks
• Oil and coolant residue must be cleaned before marking
• Large components may require custom fixtures