Mercedes OM906 - service and repair
Specialization in OM906/OM906LA engines. Diagnostics, regeneration, and bench tests. Door-to-door pickup throughout Poland. Warranty up to 12 months.
- Original parts
- Dynamometer test report after repair
- Short lead times
- Technical support and replacement selection
The Mercedes OM906 engine is a 6-cylinder unit with a capacity of about 6.4 l, widely used in commercial vehicles and construction machinery. At WIBAKO, we provide a full range of services: from quick diagnostics, through mechanical repairs (cylinder heads, pistons, bearings, crankshaft), to regeneration of accessories (turbo, injectors, pump, EGR, oil coolers) and post-repair testing on the bench.
Where you will find OM906: Mercedes Atego and Axor (distribution, construction), city buses EvoBus Mercedes Citaro (older models), special vehicles (municipal bodies, street sweepers, garbage trucks, fire trucks), Unimog (selected series), as well as generators and industrial compressors.
Contact form
Typical symptoms of internal combustion engine damage
Power loss
The engine has trouble reaching nominal RPMs, and the machine loses power under load. In OM906, the fuel system or a failing turbocharger may be to blame.
Excessive smoking
Black, white, or blue smoke from the exhaust indicates problems with fuel dosing, the turbine, or wear of piston rings and valve seals.
Unusual noises
Knocking, rattling, or metallic sounds may indicate wear of bearings, pistons, or play in the timing system. Immediate diagnostics prevent serious failures.
Vibrations and overheating
The engine runs unevenly, shakes, and the operating temperature rises quickly - these are signals of radiator blockage, problems with the water pump, fan, or mechanical damage.
Serviced brands of machines and vehicles: Mercedes-Benz (Atego, Axor, Citaro, Unimog), EvoBus, municipal bodies (FAUN, Bucher, Schmidt), fire and special vehicles, generators, and industrial compressors.
What we do as part of the service
Diagnostics & tests
Pressure measurement, flow tests, test bench verification.
Overhaul
Replacement of rotating elements, seals, surface finishing.
Calibration
Precise adjustment of valves and controls.
Upgrades
Selection of replacements and adaptations.
Door-to-door
Pick-up and delivery throughout Poland.
Warranty & report
Test protocol and warranty up to 12 months.
What the repair process looks like
Contact
By phone or via the form.
Collection
We arrange a courier; on-site disassembly possible.
Diagnostics
Disassembly, measurements, cost estimate for approval.
Repair & test
Assembly, calibration, test bench verification.
Customer reviews
Cracked oil cooler and smoking. Quick diagnosis, replacement, and testing. I recommend. - Tomasz
Citaro regained power and fuel consumption dropped. No downtime in traffic. - Paweł
Reliable estimate, deadline met. Axor is working on the construction site again. - Michał
FAQ - frequently asked questions
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#1.Where to start?
The first step is to contact Łukasz, our coordinator for internal combustion engine repairs. You can call +48 33 870 42 15 or use the contact form available on our website.
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#2.How to deliver a combustion engine for repair?
You have several convenient options to choose from:
- Personal delivery to our workshop.
- Sending the engine by courier.
- We can also arrange for a courier to ship the engine on a pallet from a specified location, and after the repair service is completed, the courier will deliver it back.
- If you lack the appropriate facilities for disassembly or assembly, our mobile service can come to you and perform these services on-site. -
#3.How does the engine repair process proceed?
Our engine overhaul process is thorough and transparent:
- Detailed verification: the engine is disassembled down to the "last screw" and subjected to a detailed verification.
- Cost estimate and schedule: we prepare a comprehensive cost estimate and determine the expected repair time.
- Major overhaul: upon your acceptance of the terms, we proceed with a comprehensive repair, which is always a major overhaul, not just a replacement of individual components.
- Testing and painting: The overhaul is completed when the engine successfully passes tests at the engine dynamometer station. The final stage is professional engine painting. -
#4.What will you find in our offer?
We always strive to present you with the most beneficial solutions, therefore depending on the availability of spare parts you will receive:
- An estimate for repair with original parts.
- An estimate for repair with high-quality spare parts.
- As an alternative, we can propose purchasing the same refurbished engine from our warehouse, which often significantly shortens the completion time. -
#5.How long does it take to repair a combustion engine?
- The verification of your engine will take us 1-3 days from the moment of delivery.
- You will receive an estimate for typical repairs within the next business day after the verification is completed.
- The repair itself usually takes about 3-5 weeks. -
#6.How do we test combustion engines?
Every refurbished engine undergoes rigorous testing on our engine dynamometer. The unit is loaded in a way that simulates operation in a construction machine. During the tests, we check key parameters such as:
- Power and torque performance.
- Coolant and oil temperature.
- Oil pressure depending on its temperature.
- Behavior and performance changes in relation to load.
The entire test lasts on average from 12 to 24 hours, depending on the specifics of the engine. -
#7.How can I be sure that the engine will work after the repair?
We care about the highest quality:
- We perform repairs exclusively on high-quality parts, and assembly work is always in accordance with the specification of a given engine.
- After the repair, the engine is thoroughly tested. The test result is always available in the form of a readable chart.
- You will receive a 12-month warranty for each repair. In case of questions regarding assembly or operation, we encourage you to use the expert knowledge of our sales advisors through a phone call. -
#8.Can I cancel the repair after receiving the estimate?
Yes, you can cancel the repair without any costs after receiving the estimate and before accepting it.
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#9.How much does it cost to repair my engine?
The cost of repair depends on several factors: the engine model, the degree of its wear and tear, and the scale of damage. Very often we can only provide an approximate price range, based on our history of similar repairs.
Mercedes OM906 - free repair estimate
Describe the symptoms, year, and engine number (OM906/OM906LA), attach photos of the nameplate and errors. We will pick up the unit or the entire machine in a door-to-door system. We will advise whether regeneration of accessories (turbo, injectors, pump, EGR) is sufficient or if a major overhaul is needed. Contact WIBAKO - we will call you back the same day.
