Engine Overhaul
The Czech Republic's leading workshop for historic tank, car, and aircraft engine restoration. Precision restoration. Zero compromises.
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Fully equipped for the highest standard of engine overhaul. In-house manufacturing of any required spare part.
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Rigorous testing at every stage ensures maximum reliability. All overhauled, self-produced and supplied parts undergo strict inspection and material testing before installation.
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Tank Engines
Knowledge passed down from the original engineers: Ilja Sercl learned tank engine design directly from the German Wehrmacht engineers who designed these machines. Pavel continues this lineage — from Jagdpanzer 38 (Hetzer) to Panther, Tiger I, and King Tiger.
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Aircraft Engines
Expert overhaul of Walter aircraft engines, backed by a certified experimental licence.
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Classic Car Engines
Precision restoration of vintage car engines — from pre-war classics to post-war sports cars. There is no engine too complex for our workshop. Museum-quality results.
Read MoreArmytech provides the highest quality historic engine overhaul, repair, and restoration. We specialize in overhauling rare historic tank, car, and aircraft engines. Armytech is one of the few companies in Europe providing such a comprehensive service, with a knowledge base dating back to the 1930s.
Most antique engine knowledge has been lost today; few understand the specifications and materials that were used, and why. We work exclusively with the highest quality materials. Because many German tanks and parts were manufactured in the historically German-populated regions (Sudetenland) where our factory is located and later also in the 'Protektorat Böhmen und Mähren' to avoid Allied bombing raids, we have inherited this unique knowledge and have direct access to many 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
- 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 received his training in engine design, construction, and overhaul directly from German Wehrmacht engineers who built these machines during the Second World War. Recognized as the leading engine specialist in the Czech Republic, he has spent his career designing racing engines and mastering the restoration of rare vintage engines — from historic tanks and aircraft to classic cars, trucks, and motorcycles. There are few types of engines we have not encountered.
Today, Armytech continues the tradition under the leadership of Pavel Sercl, Ilja's son. Pavel, a true perfectionist, inherited his father's knowledge and takes the workshop forward with a team of skilled engine specialists. Among them are Konstantin and Martin.
Supported by our engine museum as an open knowledge base, we are preserving this specialized know-how for future generations.
For decades, we have acquired highly specialized engine overhaul equipment from across the Czech Republic and Germany. Occasionally, we even discovered original machinery that once produced parts for the German Wehrmacht. Every machine we purchased has been restored to a precision of 1/1000 mm. It took many years of dedication to become one of the most specialized engine overhaul companies, equipped with one of the largest machine parks of its kind.
We are capable of manufacturing virtually any spare part ourselves, using the exact methods, materials, and finishes as the originals—often even utilizing the original machines, wherever possible.
We can also mechanically optimize our overhauled engines for today's 95 or 98 octane fuel by recalculating and altering the camshaft shape and valve closing moments through regrinding. This level of mechanical engineering is beyond the capabilities of many other overhaul companies, who typically only adjust the ignition system.
Extensive Quality Laboratory
With our high-standard laboratory equipment — including metal hardness testing, spectroscopy for metal composition analysis, and spring resistance checks — along with defectoscopy for crankshafts and housings, we ensure every overhauled part is in perfect condition and free of invisible cracks.
Surprisingly, Many New Spare Parts Are Defective
You may be surprised to learn how many brand-new spare parts we must return to suppliers after failing our material hardness or workmanship tests. With many manufacturers outsourcing production, quality standards have dropped. That is why we perform rigorous inspections on every part we receive, regardless of the origin. When a part fails, we submit a technical quality report and require the provider to send a certified replacement.
Our workshop is certified for the overhaul of piston aircraft engines for the experimental license. We overhaul engines for private clients and our main client, Walter Motor Service Co. Ltd.
We mainly overhaul the excellent Czech "Walter" airplane engines, but can handle any kind of piston engine. It was a long process, but we managed it with excellence and are now 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 vintage car engines. From pre-war classics to post-war sports cars, we bring historic engines back to life with meticulous precision.
Whether it's a 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 in trusted relationships with museums and private collectors.
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.
Ready to restore your historic engine? Contact us for a consultation.
Contact Information
💡 Workshop Visits
We welcome visits to our workshop and museum by appointment. Our workshop is located in Hejnice, Czech Republic.