engine
Engine Cooling System
Radiator, thermostat, pump, block, fan and expansion tank. Click each element for tests and faults.
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How to use this diagram
- Click any component to reveal its role, a typical value for training, how to test it and likely faults.
- Wires and connectors can be selected too — voltage drop testing is the key skill.
- Safety warnings are shown where a procedure carries risk.
All values shown are training examples. Real thresholds depend on the manufacturer, engine, temperature and system — always confirm with the vehicle service documentation.