PETROTECH service / Mechanical and  electrical engineers operate, for all kind of marine engine repairs. 

We conduct small and large repairs. We fix electrical problems and replace crankshafts, cylinder blocks or even complete engines. We test, check and overhaul fuel system components. We replace worn down parts. And we perform in situ machining of various components. In short: we do whatever needs to be done to keep downtime to our customers to the absolute minimum. At very competitive cost.

And to us it doesn’t matter what size of vessel we work on. We maintain and repair engines on board of all kind of vessels. 

• Overhaul of main and auxiliary marine engines and other engine room equipment
• Overhaul of turbochargers
• In situ machining
• Laser-controlled alignments
• Vibration measurements
• Chock-fast epoxy engine seatings
• Electrical works, troubleshooting and repairs
• Overhaul and testing of 2- and 4-stroke fuel system equipment
• And anything else we can handle to help our clients

Our workshops ( 5500 SQ-METER) are equipped to carry out following works:

• Reconditioning and honing of cylinder liners with bore diameters of 100 mm till 1000 mm. 

• Ultra-sonic cleaning of parts weighing up to 10,000 kg, 4.0 x 1.5 x 1.5 meters.

• Reconditioning of all kinds of connecting rods. 

• Overhaul of air coolers. 

• Overhaul of lubrication oil coolers. 
• Reconditioning of fuel pumps and injectors for 2- and 4-stroke engines.
• Overhaul and reconditioning of governors.
• Reconditioning of all kinds of crankshafts and camshafts. 

• Testing, calibration and modification of diesel engine- and control instruments. 

• Maintenance and repair services to marine offshore and power plants 

• All kind of steel works/pipe lines.

Wartsila 32 – Cylinder Cover Overhaul

Spare Parts Warehouses

Petrotech  supplies a great variety of original as well as OEM parts and parts suitable for Wartsila, Hanshin and MAN NIGATTA  marine engines.

This service provides our customers with parts whenever needed and wherever needed on the globe. Our customers may store their overhauled or re-conditioned or even new spare parts in our warehouse from where we send it to where customers need these parts.

Transport of parts has the same priority as repairs. For all domestic and international transports, we pack all heavy and voluminous parts in wooden boxes to make sure parts will not get damaged during transport. All of these boxes are handled according the international standard ISPM-15.

In case you have a particular inquiry, please contact our sales representatives at our head office in the TEHRAN .  +98 021 41736  or


Wartsila original parts and/or parts suitable for.

This is our main target. We have Wartsila spares, we are specialized in the following types: 20v34SG . In our stock we keep small and large parts,

Futhermore we have a large range of electrical parts such as sensors, cables, governor controls

Other brands







If you have a enquiry or a question, please do not hesitate to contact us!