Hyundai Power Products
Incomplete Combustion / Coolant or Fuel Issue
Excessive white smoke from exhaust during startup and running
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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
Cold engine with weak glow plugs, Water-contaminated diesel fuel, Low compression, Coolant entering combustion chamber (head gasket)
How to Fix / Troubleshooting
Safety first: Operate in a well-ventilated outdoor area. Avoid inhaling exhaust.
- Fuel quality: Drain a sample from the Hyundai fuel tank bottom and filter. If water or contamination is present, drain and refill with clean fuel and replace the fuel filter.
- Glow plug check: Test and replace weak glow plugs to improve cold starting.
- Monitor coolant level: If coolant level drops and white smoke has a sweet smell, suspect head gasket issues and stop using the generator.
- Professional diagnosis: Have a technician perform compression and cooling system pressure tests if white smoke persists.
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Repair Difficulty
Professional Required
5/5
Required Part
Cylinder Head Gasket
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