Engine Overhaul
The most famous highly specialized engine overhaul workshop dedicated to historic tank, car, aircraft and ship engines in the Czech Republic.
Read MoreWorkshop
The most precise and complete engine overhaul machine park in Czech Republic. We produce virtually any spare part in the original way.
Read MoreQuality Control
Each piece passes strict quality control and testing in every step. Even newly supplied spare parts are rigorously tested.
Read More
Tank Engines
50+ years of experience with historic tank engines — from Jagdpanzer 38 Hetzer to Tiger II Maybach HL230. Our core expertise since 1975.
Read MoreAircraft Engines
Since 2015, certified for the overhaul of piston aircraft engines. Contact us for your specific aircraft engine type.
Read MoreClassic Car Engines
Precision restoration of rare and vintage car engines — from pre-war luxury cars to classic sports cars. Museum-quality results.
Read MoreShip Engines
Heavy-duty overhaul of historic steam and diesel ship engines. Including the famous passenger ship "Nepomuk" in Prague.
Read MoreArmytech provides the highest quality historic engine overhaul, repair and restoration. We are specialized in overhauling rare historic tank, car, aircraft and ship engines. Armytech is one of the last companies in Europe providing such a comprehensive service.
Most antique tank knowledge has been lost and few understand either the specifications and materials that were used. We work only with highest quality German materials. As many German tanks and parts were produced in the Czech Republic after the German invasion (Protektorat Böhmen und Mähren), we have inherited the knowledge and have access to much of the original materials from that era.
Armytech has experience in the following overhauls:
- Jagdpanzer 38 (Hetzer) — Original Praga gasoline engine overhaul (picture gallery)
- Maybach HL230 — 23 litre V12 with 700HP, used in Panther, Tiger II and Jagdtiger (overhaul gallery)
- Maybach HL120 — 11.9 litre V12 with 320HP, used in Panzer III, Sturmgeschütz III and Panzer IV
- Heavy ship engines — Steam and Diesel, including the historic passenger ship "Nepomuk" in Prague
- Passenger, racing & truck engines — Also compressor and turbo
- Czech engines — Praga and Tatra
- Classic car engines — For the National Museum in Prague and international clients
Armytech has an excellent international reputation from collectors worldwide. We have restored the tanks and many classic cars at the National Prague War Museum.
We can diagnose issues quickly and get your engines and transmissions up and running fast. In case of minor damages we also travel to your location to perform on-site repairs.
Armytech is specialized in overhaul of extremely rare old-timer engines and gearboxes.
Ilja Sercl has been trained in engine building and overhaul by German engineers who had been working during the Second World War for German engine productions. He is known as the leading engine specialist in the Czech Republic, building and inventing racing engines all his life and overhauling all kinds of rare, vintage engines including motorcycle, car, truck and tank engines. There is almost nothing our workshop has not seen yet and definitely nothing we cannot overhaul.
Ilja Sercl passed all his knowledge to his son Pavel Sercl who is running the workshop together with his father and a team of highly qualified engine enthusiasts.
With our engine museum as open knowledge base, we are preserving the know-how for future generations.
Little by little we are purchasing highly specialized engine overhaul equipment from all over the Czech Republic, but especially from companies like Maybach, Praga, Tatra and CKD, producing already for the German Wehrmacht. At the moment we have got the largest specialized engine overhaul machine park in the Czech Republic. Each of our purchased machines we overhauled to a precision of 1/100 mm. It took us many years of dedication to get to this point.
We are able to produce virtually any spare part ourselves in the same way it has been produced originally, with the same finish and materials.
Of course we improve the overhauled engines to today's gasoline 95 or 98 octane, by calculating and changing the camshaft and valve closing moment mechanically, which is something most overhaul companies are not able to do as they only change the ignition. Also we mount historic high performance sodium filled aircraft valves to avoid any kind of overheating.
Extensive Quality Control Equipment
Thanks to having the highest standard of equipment to measure metal hardness, the resistance of springs, to check the crankshafts and housings with defectoscopy, we make sure each part overhauled is in perfect shape and has no invisible cracks.
Many New Spare Parts Are Defective
Surprisingly you might be shocked to see how many spare parts we receive from original suppliers, from Europe and USA, which we had to send back after checking the hardness of the material or the workmanship. Most of those suppliers outsourced and the quality is not the same anymore.
So even with new bought spare parts produced by whomever, it is necessary to do an intense quality check. Most of the time after writing a technical quality report, we get new parts sent back to us with an apology from the providers.
Our workshop has been certified for the overhaul of piston aircraft engines. We overhaul engines for private clients and our main client Walter Motor Service Co. Ltd. The licence is for experimental aircraft engines.
Mainly we overhaul "Continental", "Lycoming" and the excellent Czech "Walter" airplane engines, but can do any kind of piston engine. It was a long process but we managed with excellence and are one of the very few certified aircraft overhaul workshops in the Czech Republic.
See our full 1928 Continental Car Engine gallery (62 photos) below ↓
Our workshop specializes in the complete restoration of rare and vintage car engines. From pre-war luxury automobiles to classic sports cars from the 1950s and 1960s, we bring historic automotive powerplants back to life with meticulous precision.
Whether it's a naturally-aspirated racing engine, a robust inline-six, or a complex V12 — we approach every project with the same dedication and attention to detail that defines our tank and aircraft engine work. We work closely with museums, private collectors, and classic car restoration shops worldwide.
Our process includes complete disassembly, ultrasonic cleaning, precision measurement, and rebuilding to original — or improved — specifications. We source period-correct materials and components wherever possible, and manufacture custom parts in-house when originals are no longer available.
We have extensive experience with engines from manufacturers including Mercedes-Benz, BMW, Porsche, Ferrari, Jaguar, Aston Martin, Rolls-Royce, and many Czech marques such as Tatra and Praga.
📸 Photo gallery for the "Nepomuk" ship engine project coming soon — stay tuned!
Armytech has decades of experience with heavy marine engines — both historic steam and diesel powerplants. This is one of the most specialized areas of our work, requiring unique expertise and equipment that few workshops in Europe possess.
Our most notable marine project is the historic passenger ship "Nepomuk", which operates on the Vltava River in Prague. We performed a complete overhaul of its diesel engine, ensuring it meets both historical authenticity and modern safety and emission standards.
Marine engine restoration demands a different approach than land-based engines. The saltwater environment, constant vibration, and decades of continuous operation create unique challenges. Our team has developed specialized techniques for inspecting, cleaning, and rebuilding marine engine components to withstand decades of further service.
Our services include complete engine rebuilds, crankshaft and cylinder block restoration, turbocharger overhaul, and the manufacture of obsolete spare parts using original blueprints and our own 3D scanning capabilities.
Ready to restore your historic engine? Contact us for a consultation.
Contact Information
💡 Workshop Visits
We welcome visits by appointment. Our workshop is located in Hejnice, Czech Republic.