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Petrol Attendant Course

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🎯 Learning Outcomes

By the end of this topic you will be able to:

  • Safely open and support a vehicle bonnet.
  • Identify the main components visible under the bonnet.
  • Follow the correct procedure before and after bonnet access.
  • Apply safety rules to protect yourself and the customer’s vehicle.

Why Safe Bonnet Procedures Matter

Checking under the bonnet is a standard service that customers expect from a petrol attendant. Done correctly it builds trust, prevents accidents, and protects both the attendant and the vehicle. Done incorrectly it can result in:

  • Burns from a hot engine or radiator cap.
  • Damage to sensitive engine components.
  • Injury from a falling bonnet.
  • Fire risk near fuel or electrical components.

Before Opening the Bonnet

Pre-Check Steps

  1. Engine must be off β€” always ensure the engine has been switched off before opening the bonnet. A running engine has moving fan blades that can cause serious injury.
  2. Ask permission β€” always ask the customer: “May I check under the bonnet for you?”
  3. Allow to cool β€” if the vehicle has just arrived after a long journey, allow 2–3 minutes before touching hot components.
  4. Check for leaks β€” look underneath the vehicle for any dripping fluid before lifting the bonnet.
  5. Locate the release lever β€” usually found inside the car near the driver’s footwell or under the dashboard; ask the customer to pull it if you cannot locate it.

Opening the Bonnet β€” Step by Step

  1. Ask the customer to pull the interior release lever.
  2. Stand in front of the vehicle and locate the secondary safety latch (a small lever under the front edge of the bonnet).
  3. Press or slide the secondary latch to the side while lifting the bonnet simultaneously.
  4. Raise the bonnet fully and secure it with the bonnet prop rod (metal rod inside the bonnet area) β€” slot the prop rod tip into the designated hole to hold the bonnet open safely.
  5. Never prop the bonnet with anything other than the dedicated prop rod.

What You Will Find Under the Bonnet

ComponentFunctionWhat to Check
Engine oil dipstickMeasures oil level in the engine sumpLevel between MIN and MAX marks
Coolant reservoirStores excess coolant for the radiatorLevel at MIN/MAX line on reservoir
Brake fluid reservoirHydraulic fluid for the braking systemLevel between MIN and MAX
Windscreen washer bottleWater reservoir for windscreen wipersSufficient water level
BatteryPowers the vehicle’s electrical systemsCorrosion on terminals (visible white/blue crust)
⚠️ Safety Warnings β€” Never Do These

  • Never open the radiator cap when the engine is hot β€” scalding coolant can spray and cause severe burns. Wait until the engine is completely cool.
  • Never touch moving fan belts or the cooling fan β€” the fan can start automatically even with the engine off on some vehicles.
  • Do not smoke or use open flames near the engine bay β€” fuel and oil vapours are flammable.
  • Never lean over the engine with loose clothing or a tie β€” it can get caught in pulleys.

Closing the Bonnet

  1. Remove and re-seat the prop rod in its bracket holder before closing.
  2. Lower the bonnet gently until it is about 30 cm above the closed position.
  3. Let the bonnet drop freely under its own weight β€” do not slam it.
  4. Press down firmly on both sides to confirm the latch has engaged.
  5. Give the bonnet a slight upward tug to confirm it is locked shut before the customer drives away.

Key Terms

TermDefinition
Prop rodA metal rod inside the bonnet area used to hold the bonnet open safely.
CoolantA liquid mixture (water + antifreeze) that regulates engine temperature.
DipstickA metal rod inserted into the oil sump used to measure the engine oil level.
Secondary latchThe second safety catch under the front of the bonnet that prevents accidental opening while driving.
βœ… Quick Knowledge Check

  1. Why must the engine be switched off before opening the bonnet?
  2. What is the purpose of the prop rod and where is it stored?
  3. Why should you never open a radiator cap on a hot engine?

📚 Additional Resources

📖 Further Reading

🎬 Watch: How to Check Car Basics Under the Bonnet

A practical walkthrough of opening the bonnet safely and identifying key fluid and engine components.

📊 Chapter 2 Presentation

Review the full Chapter 2 slide deck used in this module:

📥 View Chapter 2 Presentation

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