Kohler Coolant Leak

Coolant puddle under generator or sweet smell around unit

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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

Cracked radiator or hose, Loose hose clamp, Failed water pump seal, Leaking coolant level sensor or expansion tank

How to Fix / Troubleshooting

Safety first: Turn generator OFF, open main breaker, and allow engine to cool completely before opening the cooling system.

  • Identify leak: Inspect radiator, hoses, clamps, water pump, and expansion tank for wet areas or dried coolant residue.
  • Tighten clamps: Snug hose clamps and recheck for leaks.
  • Replace hoses: Replace any cracked or swollen hoses with coolant-rated hose of the correct size.

Significant leaks or radiator/water pump failures should be repaired by a technician. Refill and bleed the system per Kohler procedures after repairs.

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Repair Difficulty

Hard 4/5

Required Part

Radiator Hose
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