Piston Crown & Skirt Reconditioning
OEM-Grade Reconditioning with Guaranteed 20,000 Operating Hours
Pistons in 2-stroke marine engines are exposed to extreme conditions, leading to thermal fatigue, micro-cracking, crown distortion, corrosion, and ring groove wear. While reconditioning is the most cost-effective solution, long-term durability depends on the precision and quality of the process.
KIMI sets new marine industry standards in piston crown reconditioning by combining AI-controlled robotic welding with CNC precision machining, delivering OEM-grade results with significant cost advantages. Unlike partial repairs, we fully rebuild ring grooves, restoring components to true zero-hour condition.
Every piston crown is warranted for 20,000 operating hours, ensuring peak performance, durability, and long-term reliability.
Customers Benefits
Reduced Vessel Downtime
Significant Cost Savings Vs OEM replacement
OEM-Level Quality & Durability
Piston Crown Rebuilding Process
3D SCANNING & NDT
Wear, distortion and geometry deviations are detected and accurately mapped
GROOVE REMOVAL & REBUILDING
Worn material is eliminated, and grooves are rebuilt using robotic deposition
COMBUSTION SURFACE RESTORATION
Dimensional accuracy is recovered through controlled machining to original tolerances
INCONEL 625 OVERLAY
Critical areas are protected against thermal loads and corrosive conditions
THERMAL STRESS RELIEF
Residual stresses are removed to stabilize structure after high-energy processes
IN-HOUSE CHROME PLATING
Surface characteristics are enhanced with controlled thickness and high adhesion properties
CNC MACHINING & GRINDING
Final geometry is achieved with micron-level accuracy and precise alignment
QUALITY CONTROL
Process integrity is verified through staged inspections and certified procedures
TRACEABILITY
Full lifecycle tracking is ensured through unique identification and documented records
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FAQs
Piston crown and skirt reconditioning services are available for all major two-stroke marine diesel engines, including those manufactured by:
• MAN Energy Solutions (MAN B&W engines)
• WinGD (Sulzer-type engines)
• Mitsubishi Heavy Industries marine engines
The rebuilding process restores piston components to maker specifications, ensuring reliable operation across all major engine platforms.
Yes. KIMI operates a fully certified in-house chrome plating facility, allowing complete control of quality, thickness, and process parameters.
This infrastructure ensures that piston ring grooves are plated to the exact 0.50 mm thickness required by maker specifications, with full process traceability and approved inspection procedures. Performing chrome plating in-house also reduces repair lead times and guarantees consistent quality.