MTU Onsite Energy
Poor Exhaust Ventilation / Exhaust Leak
Strong diesel odor and visible exhaust fumes accumulating in generator room
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Leaking exhaust flex connection, Cracked exhaust manifold, Inadequate room ventilation, Exhaust backflow from stack
How to Fix / Troubleshooting
Safety first: Carbon monoxide is deadly. Evacuate the area if fumes are heavy and ventilate thoroughly.
- Inspect exhaust joints: Check flex connections, flanges, and gaskets for soot marks indicating leaks. Tighten or replace components as needed.
- Manifold inspection: Look for cracks or broken studs on the exhaust manifold.
- Ventilation check: Verify that intake and exhaust louvers and fans are operating and sized per MTU installation guidelines.
- Stack design: Ensure the exhaust stack terminates away from air intakes and building openings to prevent recirculation.
- Test run: After repairs, run the generator and confirm that fumes are properly exhausted and room CO levels are safe.
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Repair Difficulty
Medium
3/5
Required Part
Exhaust Flex Connector
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