Cylinder head overhauling

The cylinder head plays a vital role in combustion efficiency, cooling and engine reliability. At Nicoverken, we specialize in the professional overhauling of cylinder heads for marine and industrial diesel engines. Our overhaul process restores correct sealing, valve operation and structural integrity, ensuring optimal engine performance.

Exchange base & stock availability

Where applicable, Nicoverken offers exchange or stock solutions for cylinder heads to reduce engine downtime. Used cylinder heads can be returned and replaced with fully reconditioned units that are ready for installation.

All exchange cylinder heads are thoroughly inspected, overhauled and tested before delivery to ensure reliable operation.

Key benefits:

  • Reduced engine downtime
  • Fully overhauled and tested cylinder heads
  • Cost-effective alternative to new components
  • Ready for direct installation
Step by step

What do we do when overhauling a cylinder head

Our cylinder head overhauling process follows a structured and controlled procedure:

1
Complete disassembly of the cylinder head

The cylinder head is completely disassembled to allow every component to be inspected individually. This ensures that hidden wear or damage can be identified before the overhaul begins.

2
Thorough cleaning of all components

All parts are carefully cleaned to remove carbon deposits, oil residue and other contaminants. A clean surface is essential for accurate inspection and reassembly.

3
Inspection for cracks, wear and deformation

Valves and valve seats are checked for wear, sealing and correct contact surfaces. Where necessary, they are reconditioned to restore proper engine performance.

4
Pressure testing of cooling and oil passages

The cylinder head is pressure tested to detect internal leaks or cracks that are not visible during visual inspection. This helps ensure reliable operation after overhaul.

5
Inspection and reconditioning of valves and valve seats

Valves and valve seats are checked for wear, sealing and correct contact surfaces. Where necessary, they are reconditioned to restore proper engine performance.

6
Machining of sealing surfaces where required

The sealing surfaces are machined when necessary to restore flatness and ensure a proper seal between the cylinder head and engine block. This helps prevent compression or coolant leaks.

7
Reassembly according to specification

After all inspections and machining have been completed, the cylinder head is carefully reassembled using the correct procedures and specifications. A final inspection is carried out before the component is released for service.

Quality control & testing

Quality control is a critical part of cylinder head overhauling. Each cylinder head is carefully tested and inspected before approval.

Our quality checks include:

    Pressure testing after overhaul
  • Verification of valve operation and sealing
  • Dimensional and surface inspection
  • Final visual and technical inspection

Only cylinder heads that meet our quality standards are approved for delivery.

Applications

Our cylinder head overhauling services are suitable for a wide range of applications, including:

Main engines
Auxiliary engines
Marine diesel engines
Generator sets
Indusrtial Power Unites

Why choose Nicoverken?

  • Full in-house cylinder head overhauling
  • OEM-based specifications and tolerances
  • Experienced specialists in engine components
  • Reliable turnaround times
    Proven quality control and testing
KEEP YOUR ENGINE OPERATIONAL

Nicoverken is your trusted service partner

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