Two stroke engine spare parts reconditioning

The scope of regeneration for marine two stroke engine spare parts supplied by MSS Motor Ship Service includes:

• cylinder covers,
• jackets,
• piston crowns,
• piston skirts,
• exhaust valve spindles,
• housing,
• exhaust valve seats,
• cylinder liners,

from producers such as MAN, Holeby, Hyundai, Hanshin, B&W, MaK, Wartsila/Sulzer, ex. Stork, Yanmar, Deutz, Mitsubishi, Mitsui, Pielstick, ABB etc.

We have a stock of reconditioned spare parts of marine two-stroke engine in our warehouse in Poland (Gdansk/Zielona Góra), including MAN B&W, Mitsubishi and Sulzer, Deutz etc. which may be send directly on board or elsewhere immediately in case of emergency situation/ unexpected repair or overhaul. Please check “spares from stock” and do not hesitate to contact us if there is no spare part you are interested in on the list – the list is currently updated.

Reconditioning of two stroke marine engine cylinder covers

Cylinder heads may be regenerated in few options, partially or fully depending on the damages found what allows for time and budget savings. The cylinder heads are regenerated by machining, welding and normalization after the whole process.

Our technology and experience of our specialist allows for:

• Full regeneration of corroded elements to nominal values,
• Chamber cracks repair which came from overheating or unproper previous regeneration,
• Cooling jackets repair/regeneration – cracks are repaired by welding or metal stitching
• Water cooling area full regeneration,
• All damaged contact surfaces rewelding and machining for nominal value,
• Exhaust valve seat place (contact surface/bore) rewelding and machining for nominal dimensions,
• Injectors seats regeneration, starting valve connection to the chamber repair if broken,
• All threads reconditioning, if damaged

Reconditioning of two stroke marine engine piston crowns

The reconditioned piston crowns work as long as original ones due to the chroming layer performed due to the MAN standards. Piston crowns regeneration includes damaged ring grooves and piston surface.

We offer regeneration of piston crowns to LNG powered vessel engines covered with six months guarantee. On the Owner’s request the regenerated piston crowns are certified with Class certificate (PRS or DNV)

How goes the process:

• verification of piston crown measurements
• cracks test
• preparation for hard-facing
• welding with materials meeting the requirements of class and OEM makers
• normalization after welding process
• chrome plating of ring grooves with coating over 0,40 mm which ensures long service life
• final inspection and pressure tests

Other reconditioning of two stroke marine engine

Reconditioning of two stroke engine piston skirts:

The scope of repair:

• piston skirts regeneration by replacement of bronze rings for new ones if needed,
• cracks repair if needed ,
• damaged threads repair if needed,

Reconditioning of two stroke engine exhaust valve spindle housing and seat:

The scope of regeneration:

• valves (nimonic)
• valves housing crack repair,
• valve seats (nimonic),
• damaged valve stems on working surface of seals or valve guides

Reconditioning of two stroke engine cylinder liner:

• liners honing,
• regeneration of o-ring grooves,
• regeneration of the corroded surface and the new rust protection,
• regeneration of the contact seats at  the liner.