This article describes the dual fuel tank system found in some diesel models. It covers the configuration, filling process, fuel gauge operation, and potential issues related to tank punctures.
Problem
Fuel tank punctures can occur from off-road driving, potentially leading to fuel leaks and reduced range. Rocks or other debris can become lodged between the tank and its protective guard, causing damage over time.
Solution
- For plastic tanks: A plastic welding repair may be possible.
- Protective Guards: It is important to maintain the protective guards. Replacing damaged guards is advised.
Fuel Tank Configuration
- Two tanks: a front (plastic) tank and a rear (metal) tank.
- The front tank has a capacity of 87 liters.
- The rear tank has a capacity of 93 liters.
- Fuel is drawn from the front tank. As fuel is used from the front tank, fuel is transferred from the rear tank to the front tank. The rear tank empties first.
Fueling Process
- The rear tank has a more direct fill path compared to the front tank, which requires a 90-degree turn.
- When filling, the rear tank likely fills first, especially when partially filling. Once on the move, fuel is transferred to the front tank.
Fuel Gauge Operation
- Each tank has its own fuel level sender.
- As fuel is used from the rear tank, the fuel gauge drops to approximately half.
- Once the rear tank is empty, the gauge briefly jumps to full, and the 90-liter light comes on.
- The gauge then decreases normally until the low fuel warning activates with approximately 15 liters remaining.
This technical summary was auto-generated based on recovered archives. Do not rely on its factual accuracy. Refer to the original thread. Source: View Original Conversation
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