Turmar Marine

Recondition Of Engine Components

Reconditioning Services

Two-Stroke Piston Crowns

The DMI process involves detailed Inspection, Pre-machining in way of damaged crown top, worn ring grooves and other affected areas to the base metal.
Complete building up by automatic Submerged Arc Welding on a specially designed positioner.
Stress Relieving under precise controlled conditions.
Machining to the correct dimensional sizes.
Hard Chrome Plating of piston ring grooves as per OEM recommendations and grinding to finished size.
Pressure Testing and Certification.

Four-Stroke Piston Crowns

Both steel and cast iron piston crowns are reconditioned by:

Machining and Grinding of ring grooves to remove the worn and damaged material.
Hard Chrome Plating of the ring grooves and Grinding to standard or next oversize as per OEM recommendation.
Pressure Testing and Certification.

Aluminum pistons are reconditioned by using specialised Welding and Plating technology.

Cylinder Covers

Detailed Inspection and Pre-machining in way of burnt area to base metal.
Building up the eroded area on a specially designed automatic welding positioner.
Stress Relieving prior to Finish Machining.
Final Machining on all valve ports, landing face and cooling bores as per OEM recommendations.
Pressure Testing and Certification.

Piston Skirts

Removal of existing rubbing bands and Pre-inspection.
MPI check for cracks.
Fitting of new bands and Finish Machining to OEM dimensions.

Exhaust Valve Spindles and Seats

Pre-inspection for wear and damage.
Pre-machining to remove all fatigued material.
Rebuilding by MIG and Plasma Transferred Arc on the seat location.
Rebuilding of valve spindle stem by Hard Chrome Plating or Thermal Spray process.
Final Machining and Grinding to OEM specifications.

Exhaust Valve Housings and Cages

Pre-inspection of eroded and corroded areas.
Pre-grinding to remove all fatigued and burnt material.
Welding and Stress Relieving.
Final Grinding to the required size.
Application of Multi-layer Coating by Thermal Spray process. This coating can resist chemical attack from sulphuric acid and is highly resistant against erosion caused by the gas stream.
Pressure Testing and Certification.

Piston Rods

As per OEM recommendation, the piston rods are Ground undersize or brought to standard size by:

Build up using HVOF Thermal Spray process.
Final Grinding and Polishing to standard dimensions.

Cylinder Heads

Chemical Cleaning to de-carbonise and Pre-inspection.
Grinding or renewal of seat rings and valve spindles.
Renewal of valve guides and Servicing of rotor caps.
Machining of landing and combustion faces.
Assembly, Pressure Testing and Certification.

Cylinder Liners

Pre-inspection to determine wear and damage.
Honing or Deglazing.
Rebuilding by Porous Chrome Plating.
Final Honing to size.

Turbocharger Casings

Pre-inspection of eroded and corroded areas.
Pre-grinding to remove all fatigued and burnt material.
Welding and Stress Relieving.
Final Grinding to the required size.
Application of Multi-layer Coating by Thermal Spray Process. This coating can resist chemical attack from sulphuric acid and is highly resistant against erosion caused by the gas stream.
Pressure Testing and Certification.