Difficulty filling the diesel fuel tank, particularly the last portion, is a known issue that can be attributed to a few of factors. These include foaming fuel, high flow pumps and also a fault within the tank itself. Symptoms include slow filling speeds, fuel bubbling up and gurgling sounds during refueling.
Problem
- Slow refueling, especially when attempting to fill the last 40-50 liters.
- Fuel nozzle repeatedly stopping due to back pressure.
- Gurgling sounds and bubbling in the fuel filler neck.
- Taking an excessive amount of time (e.g., 45 minutes) to completely fill the tank.
Solutions
- Faulty Fuel Tank Flap: The most significant issue is a seized flap inside the main fuel tank. This prevents proper venting during refueling.
- Solution: Replace the fuel tank.
- Fuel Foaming: Diesel fuel naturally foams during refueling, particularly with high-flow pumps.
- Solution: Reduce the fuel flow rate by using a lower-flow pump setting if available. Fill more slowly to allow foam to dissipate.
- Premium Diesel Fuels: Some premium diesel fuels contain anti-foaming additives.
- Solution: Consider using a premium diesel fuel like BP Ultimate or Caltex Vortex.
Relevant Parts
- Replacement Fuel Tank (in cases of a seized flap)
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