Types of Water Pumps:
1. Centrifugal Pumps:
Centrifugal pumps are the most common type of water pump and work by using an impeller to transfer water. The impeller rotates, creating centrifugal force that pushes the water outwards, thus generating a flow of water. Centrifugal pumps are suitable for applications where a high flow rate is required.

Types of Steering Gearboxes:
1. Recirculating Ball Steering Gearbox: This type of gearbox consists of a worm gear inside a ball nut. As the steering wheel is turned, the worm gear rotates the ball nut, which then moves the pitman arm attached to the steering linkage. Recirculating ball steering gearboxes are known for their durability and ability to handle heavy loads.
2. Rack and Pinion Steering Gearbox: In this type of gearbox, a rack (a linear gear) is connected to the steering wheel, while a pinion gear engages with the rack to convert the rotary motion into linear motion. Rack and pinion steering gearboxes are popular for their responsiveness and compact design, making them suitable for a wide range of vehicles.
3. Electric Power Steering (EPS) Gearbox: Unlike traditional hydraulic steering gearboxes, EPS gearboxes rely on an electric motor to assist with steering. By providing variable levels of assistance based on driving conditions, EPS gearboxes improve fuel efficiency and offer a smoother steering experience.

2. Diagnosing a Coolant Leak:
- Start by checking the ground underneath your vehicle for any signs of coolant leaks. Look for puddles or stains that indicate a leak.
- Inspect the radiator, hoses, and connections for any visible signs of coolant leakage. Cracks, holes, or loose connections can all be culprits of a coolant leak.
- Use a pressure tester to pressurize the cooling system and check for leaks. If the pressure drops rapidly, there is likely a leak somewhere in the system.
- Check the coolant reservoir for any signs of a drop in coolant levels. If the reservoir is consistently low, there may be a leak in the system.

If the oil pan is damaged or leaking, it may need to be replaced. Replacement of the oil pan typically involves draining the oil, removing the old pan, installing a new pan, and refilling the engine with oil. It is recommended to consult a professional mechanic for oil pan replacement to ensure proper installation and prevent any issues.

1. Signs of a Coolant Leak:
- The most obvious sign of a coolant leak is a puddle of bright green, yellow, or pink fluid underneath your vehicle. Coolant has a distinct color and sweet smell, so it's easy to identify.
- Your Vehicle Speed Sensor Input's temperature gauge may start to rise, indicating that the engine is running hot due to low coolant levels.
- You may notice steam or smoke coming from under the hood, which could be a sign of a coolant leak evaporating on hot engine components.
- The heater in your car may not work as effectively, as the lack of coolant can impact the heating system.

Maintenance:
Proper maintenance of the steering gearbox is essential for ensuring its longevity and performance. Here are some key maintenance tips:
- Regularly check and top up the power steering fluid to ensure smooth operation.
- Inspect the steering gearbox for leaks, cracks, or unusual noises, which may indicate a problem that requires immediate attention.
- Have the steering system inspected by a qualified mechanic during routine vehicle maintenance to catch any issues early on.
- Follow the manufacturer's recommended service intervals for steering system components to prevent premature wear and damage.

Function:
The primary function of a steering gearbox is to convert the rotary motion of the steering wheel into the linear motion needed to turn the wheels. By utilizing a system of gears and shafts, the steering gearbox amplifies the force applied to the steering wheel, making it easier for the driver to turn the wheels. This translation of motion is essential for controlling the direction of the vehicle and maintaining stability while driving.

4. Engine Protection:
By providing proper lubrication, cooling, and contaminant removal, regular oil service acts as a crucial line of defense for your vehicle's engine. A well-maintained engine is less likely to experience issues such as overheating, premature wear, and component failure. Investing in regular oil changes can save you money in the long run by preventing costly repairs and extending the life of your vehicle.

Coolant leaks in a vehicle can be a common problem that, if left untreated, can lead to serious damage and expensive repairs. It's important to be able to identify the signs of a coolant leak and to diagnose the issue promptly in order to prevent further damage to your vehicle's engine.

1. Zirconia Oxygen Sensors: Zirconia sensors are the most common type of oxygen sensors found in modern vehicles. These sensors consist of a ceramic element coated with a layer of platinum, which reacts with oxygen in the exhaust gases. Zirconia sensors generate a voltage signal based on the oxygen content, which is used by the engine control unit to make fuel adjustments.