AMJ GIWA International Motors

09/11/2025

Oga driver

09/05/2025

How a Car Brake System Works – Step-by-Step Breakdown 🚗⚙️
Here’s a simple and clear way to understand how your car comes to a safe stop — with a text-based diagram and an easy walkthrough!

📊 Brake System Flow:

Brake Pedal → Master Cylinder → Brake Lines → Brake Caliper → Brake Pads → Disc/Rotor → Wheel

🧩 Step-by-Step Explanation:

1️⃣ Brake Pedal – You press it with your foot to begin braking.
2️⃣ Master Cylinder – Converts your foot pressure into hydraulic pressure.
3️⃣ Brake Lines – Carry the brake fluid to all four wheels.
4️⃣ Brake Caliper – Uses fluid pressure to squeeze the brake pads.
5️⃣ Brake Pads – Press tightly against the rotor/disc, creating friction.
6️⃣ Disc/Rotor & Wheel – The friction slows down the disc, and in turn, stops the wheel.

09/05/2025

🚗💨 KNOW YOUR RADIATOR!
It’s not just a metal box — it’s a heat-fighting machine! 🔥❄️

Here are the main parts of your car's radiator:

🟦 Core – Where the magic happens! Tubes + fins = cool coolant.
🔝 Inlet Tank – Hot coolant enters here from the engine.
🔻 Outlet Tank – Cooled coolant flows back to the engine.
🌀 Tubes & Fins – Transfer heat from coolant to air.
🧢 Radiator Cap – Keeps the pressure right and prevents boilovers.
💧 Overflow Tank – Catches extra coolant and sends it back when needed.
⚙️ Transmission Cooler Lines – Extra function in autos to cool the tr**ny fluid.
🔧 Mounting Brackets – Hold it all in place (no bouncing radiators here 😅).

🛠️ Take care of your radiator — your engine will thank you!

07/05/2025

COMMON GEARBOX PROBLEMS
1. Gear Slip:-
Symptoms: _The car suddenly pops out of gear or doesn't stay in gear.
Causes: _Worn-out or damaged gear teeth, worn synchronizers, or a faulty clutch.
Result: Loss of power or control, especially when shifting between gears.
2. Difficulty Shifting Gears:-
Symptoms: Hard to shift between gears, or grinding noise when shifting.
Causes: Worn clutch components, low transmission fluid, worn or damaged synchronizers, or a misaligned clutch.
Result: Rough or jerky transitions between gears, making driving challenging.
3. Grinding Noise:-
Symptoms: A grinding sound, especially when shifting gears.
Causes: Worn synchronizers, misaligned clutch, or improperly adjusted clutch pedal.
Result: Gear damage over time and difficulty shifting smoothly.
4. Clutch Problems-
Symptoms: The clutch pedal feels soft, spongy, or hard, or it doesn’t fully engage or disengage.
Causes: Worn clutch plate, damaged clutch release bearing, or hydraulic issues (low fluid or leaking clutch master/slave cylinder).
Result: Difficulty in engaging or disengaging gears, leading to jerking movements or the car stalling.
5. Transmission Fluid Leaks:-
Symptoms: -Puddles of fluid under the vehicle or low transmission fluid levels.
Causes: Damaged seals, worn gaskets, or loose bolts in the gearbox housing.
Result: Low fluid levels can lead to gear wear and hard shifting.
6. Worn Synchronizers -
Symptoms: Grinding or crunching noise when shifting, difficulty in engaging gears, especially in higher gears.
Causes: Wear and tear over time from friction between the gears during shifts.
Result: Harder gear shifts and potential gearbox damage if not repaired.
7. Clutch Drag:-
Causes: Misadjusted clutch pedal, warped clutch plate, or hydraulic issues.
Result: Difficulty in shifting and potential gearbox damage if gears are forced.
8. Noisy Transmission in Neutral
Symptoms:- A whining or rattling noise when the car is in neutral.
Causes: _Worn bearings, worn input shaft, or loose internal components.
Result: Noise and potential transmission failure if left unchecked.
9. Clutch Slippage:-
Causes: Worn-out clutch disc or pressure plate, oil contamination on the clutch, or an incorrectly adjusted clutch cable.
10. Gearbox Overheating
Symptoms: _The gearbox becomes too hot to touch, and there may be a burning smell.
Causes: -Low transmission fluid, excessive load on the gearbox, or lack of lubrication.
11. Loose or Worn Gear Linkages
Symptoms: _Vague or inaccurate gear selection, requiring more effort to shift.
Causes: Worn or loose linkages connecting the gear lever to the gearbox.
12. Clutch Pedal Problems
Causes: -Faulty clutch cable, air in the hydraulic system, or worn clutch components.
Result: -Difficulty in operating the clutch properly, making driving harder.
13. Transmission Vibration or Shudder
Causes:- Worn clutch, damaged transmission mount, or misaligned gearbox
Result: -Uneven power transfer and uncomfortable driving experience.

07/05/2025

AMJ Auto

11/01/2025

05/12/2024

Electric Fan Ignition Diagram with Auto Thermostat

If you're a car enthusiast or DIY mechanic, you've probably come across the term "electric fan ignition diagram." This diagram essentially illustrates how an electric fan is wired to a car's electrical system, allowing it to turn on and off automatically based on the engine's temperature.

Why Use an Electric Fan?

Electric fans have become increasingly popular in modern cars for several reasons:

Improved Engine Cooling: In stop-and-go traffic or during heavy loads, electric fans can help keep the engine cool, preventing overheating and potential damage.
Reduced Engine Load: Unlike traditional belt-driven fans, electric fans draw power directly from the battery, reducing the load on the engine.
Quieter Operation: Electric fans are generally quieter than their belt-driven counterparts, leading to a more pleasant driving experience.
Components of the System

A typical electric fan ignition system consists of the following components:

Electric Fan: The heart of the system, responsible for drawing air through the radiator to cool the engine.
Auto Thermostat: A temperature-sensitive switch that turns the fan on and off based on the coolant temperature.
Relay: A switch that controls the flow of power to the fan, protecting the wiring from excessive current.
Wiring Harness: Connects all the components together and provides power to the system.
How It Works

Here's a step-by-step breakdown of how an electric fan ignition system operates:

Engine Starts: When the engine starts, the coolant begins to circulate through the radiator.
Coolant Temperature Rises: As the engine warms up, the coolant temperature also increases.
Auto Thermostat Activates: Once the coolant reaches a predetermined temperature (usually around 195°F or 90°C), the auto thermostat closes, completing the electrical circuit.
Relay Engages: The relay receives power and switches on, allowing current to flow to the electric fan.
Fan Starts: The electric fan begins to spin, drawing air through the radiator and cooling the coolant.
Coolant Temperature Drops: As the coolant cools down, the auto thermostat opens, breaking the electrical circuit.
Fan Stops: The relay disengages, and the electric fan stops running.
Benefits of Using an Auto Thermostat

Using an auto thermostat offers several advantages:

Optimal Cooling: The fan only operates when needed, preventing unnecessary power consumption and wear on the fan motor.
Reduced Fuel Consumption: By reducing the load on the engine, an electric fan can help improve fuel efficiency.
Extended Fan Life: The auto thermostat helps prevent the fan from running continuously, prolonging its lifespan.
Conclusion

An electric fan ignition system with an auto thermostat is a valuable addition to any car, especially in hot climates or during stop-and-go traffic. By understanding the components and how they work together, you can effectively troubleshoot and maintain this system to ensure optimal engine cooling and performance.

13/10/2024

The following are the Types of Transmission Systems:

1. Manual: It is a transmission system where gear changes require the driver to manually select the gears by operating a gear stick and clutch.

2. Automatic: It is a multi-speed transmission used in motor vehicles that does not require any input from the driver to change forward gears under normal driving conditions.

3. CVT: A CVT, or continuously variable transmission, is an automatic transmission that uses pulleys and a belt or chain to continuously change gear ratios, instead of fixed gears.

4. IMT: Intelligent Manual Transmission (iMT) is a clutchless transmission that combines the convenience of an automatic transmission with the control of a manual transmission.

5. DCT: A dual-clutch transmission (DCT) is a type of transmission that combines the performance of a manual transmission with the ease of use of an automatic transmission.

6. AMT: The automated manual transmission is a type of transmission for motor vehicles. It is essentially a conventional manual transmission equipped with automatic actuation to operate the clutch and/or shift gears.

30/08/2024

Automatic Gear Shift Lever: All Letters Explained

WHAT DOES THE P-R-N-D-L MEAN?
Automatic car drivers come across the P-R-N-D-L. The automatic gear shift lever letters and numbers represent a distinctive task or setting. Knowing the details about these letters will help understand the automatic gear shift lever mechanism.

You may also find letters other than the P-R-N-D-L, depending on the car model. P stands for parking, R for reverse, N for neutral, D for driving, and L represents low driving gear. Some cars may have an M that represents a manual shifting option.

Let’s learn more about each letter and number on the automatic gear shift lever.

P: PARKING
P in an automatic gear shift lever stands for Park. When the driver moves the gear shift lever to the P position, it engages a locking mechanism in the transmission that prevents the vehicle from moving.

It is essential for safety since it ensures the vehicle cannot roll away when parked. When the car is in the P position, the engine disconnects from the wheels preventing the engine from damage due to the strain of trying to move the stationary vehicle. However, it may happen that the car won’t shift from park mode. Catering to this, you will need to check the transmission and brakes.

R: REVERSE
R refers to Reverse. When the automatic gear shift lever is in the R position, it engages the reverse gear in the transmission, allowing the vehicle to move backwards.

Driver must come to a complete stop before shifting to reverse. It will make sure that there is enough clearance behind the vehicle before backing up. Besides, use the rearview and side mirrors to check for obstacles or pedestrians before reversing.

N: NEUTRAL
N stands for Neutral. When the driver moves the automatic gear shift lever to the N position, it disengages the transmission from the engine. That said, it allows the vehicle to roll freely without the engine’s power.

When the vehicle needs to be pushed or towed, or the engine needs to be started, but the car is not moving, the N position helps. It is important to note that the vehicle should be in the N position and not in gear if on a slope or incline. Therefore, the car emergency brakes should be engaged when parked in the N position.

D: DRIVE
D in an automatic gear shift lever means Drive. It engages the forward gears in the transmission. The transmission will automatically shift between the gears as the vehicle accelerates and decelerates.

The D position is for normal driving in most situations, such as on the highway or in city traffic. The vehicle will move forward when engaged in D when the driver presses the accelerator pedal. Some cars also have the following types of D gear modes:

D1: It is the First Gear used for maximum torque and pulling power at low speeds, such as when towing a heavy load or driving up a steep hill.
D2 and D3: These are the second and third gears engaged where more traction or braking is required, such as when driving on slippery roads.

L: LOW DRIVE GEAR
L stands for Low Gear or Low Range. It is a mode found on some vehicles with automatic transmissions, usually in combination with a four-wheel drive system. When the gear shift lever is in the L position, the transmission locks into the lowest gear available. It provides maximum torque and pulling power.

In some vehicles, the L mode helps in engine braking when going downhill. When the driver shifts to L, the transmission will downshift to a lower gear, increasing engine RPMs and slowing the vehicle down without the need for constant braking. The low gear is replaced and present as b-gear in hybrid cars, it stimulates regenerative braking and allows smooth travel on steep hills.

M: MANUAL SHIFTING OPTION
M represents the Manual Mode. It gives the driver more control over the transmission’s gear selection. Moreover, it allows them to shift gears manually using paddle shifters.

S: SPORTY DRIVE
Representing the Sports Driving Mode, it provides a more engaging driving experience. The S on the automatic gear shift lever changes the shift points of transmission to allow a dynamic ride. The transmission holds onto gears for longer periods and shifts at higher RPMs. It allows quicker acceleration and sharper throttle response.

A drawback of driving on S for more time is that it may decrease fuel efficiency and cause unnecessary wear and tear on the engine and transmission. However, some vehicles have a feature that automatically shifts the gear to D mode after a while.

These were all the letters on the automatic gear shift lever. From normal driving experience to a dynamic and sporty mode, the automatic transmission ensures a fine experience. However, it is crucial to maintain your transmission as a car won’t go into gear or pose gear issues with a faulty transmission.

28/08/2024

Main Parts of a Car Engine

Understanding the components of a car engine can provide insight into how vehicles operate and why maintenance is so crucial. Below are the key parts of a car engine:

1. Cylinder Head:
The cylinder head, typically made from materials like cast iron or aluminum alloy, plays a crucial role in managing airflow in and out of the cylinder and fuel distribution.

2. Cylinders:
Cylinders are essential for all types of engines. These components, often made of iron, can handle extremely high temperatures and provide a sealed environment for the pistons to move.

3. Pistons:
Pistons move up and down within the cylinder, helping to convert fuel energy into mechanical motion. They are made gas-tight by piston rings to maintain efficiency.

4. Connecting Rod:
The connecting rod links the piston to the crankshaft, converting the piston's motion into rotational movement, which powers the vehicle.

5. Crankshaft:
The crankshaft is vital as it converts the pistons' reciprocating motion into rotational motion, driving the vehicle’s wheels.

6. Camshaft:
A camshaft controls the opening and closing of the intake and exhaust valves, converting rotational motion into reciprocating motion.

7. Rocker Arm:
The rocker arm transmits camshaft movement to the valves, helping to manage the intake and exhaust processes.

8. Transmission:
The transmission system ensures that the power generated by the engine is efficiently delivered to the wheels, managing speed and torque.

9. Spark Plug:
Spark plugs ignite the air-fuel mixture in the cylinder, initiating the combustion process that powers the engine.

10. Engine Valves:
Engine valves regulate the flow of air and fuel into the cylinder and manage the exhaust of combustion gases.

11. Cooling System:
The cooling system prevents engine overheating, ensuring that it operates at an optimal temperature and avoiding damage.

12. Battery:
The battery is central to the engine’s operation, providing the necessary power to start the vehicle and supply electricity when needed.

13. Fuel Supply:
The fuel supply system, traditionally involving carburetors, manages the air-fuel mixture entering the engine.

14. Air Filter:
The air filter protects the engine from dust and debris, ensuring clean airflow and optimal performance.

15. Exhaust:
The exhaust system expels burnt gases from the engine while minimizing noise, thanks to the silencer.

AMJ GIWA INTERNATIONAL AUTO

21/08/2024

RADIATOR CAP: FREQUENTLY ASKED QUESTIONS

1. What is a radiator cap?
- A radiator cap is a small but important component of a car's cooling system.
- It is typically found on the top of the radiator and serves as a seal to maintain the pressure and coolant level in the radiator.

2. How does it function?
-*The radiator cap has a spring-loaded valve that regulates the pressure inside the cooling system.
- *When the engine heats up and the coolant expands, excess pressure is released through the radiator cap's valve into the overflow reservoir.
- *As the engine cools down, the vacuum created in the cooling system draws coolant back from the overflow reservoir through the radiator cap.

3. Its importance
- *The radiator cap plays a crucial role in maintaining the proper pressure and coolant level in the cooling system.
- Without a functioning radiator cap, the engine can overheat or the cooling system can develop leaks.

4. Signs of a Faulty radiator cap
- *Visible signs of wear or damage on the radiator cap itself
-* Coolant leaks around the radiator cap
- *Engine overheating or fluctuating temperature gauge readings
- *Low coolant levels despite regular refilling
- *Hissing sound coming from the radiator cap
- Steam or smoke coming from under the hood