Car Parts

Know the signs. Be aware of signs that your engine is on its last legs. Here are a few warning signs that your engine will display:

  • Refusing to start in cold weather

  • Oil pooling under the vehicle whenever it is parked for any length of time

  • Using lots of oil

  • Severe and persist engine knocking

  • Steam coming out of the engine on a regular basis

If your vehicle is exhibiting any of these signs, it is best to have the vehicle fully inspected. One of YourMechanic's mobile mechanics will be happy to come to your home or office to inspect your engine and give you a prognosis on its health.

if you see these sign you need to change your engine. its time to gather some information first: collect vital information. Collect the vehicle's engine information, which will help you find the correct engine replacement for your car.

You will need the VIN number, engine code, and the production date. This information will make it easier to determine if a used engine is compatible with your car.

The VIN number can be found on the VIN plate, which is located on the front section of the dashboard on the left-hand side of the vehicle. You can usually read it through the windshield.

now its time to find a new used engine. maybe you have some questions such as:

-Is the Company Reputable?

-What's the Mileage on the Engine, and How Old Is It?

-Is It Tested?

-Will This Engine Work in My Vehicle?

-What's the Warranty?

We will make it easy for you. We have an answer to every question just contact us and we will handle anything.

The engine under the hood is the most important component of a vehicle. Without the engine, your car cannot run and is of little value to you. If you have been in an accident or neglected your engine to the point that it has stopped running, you may find yourself in the market for a used car engine.

While buying a new engine can be expensive, it is usually cheaper than buying a whole new car. Buying a new engine can be intimidating, and for good reason, since it can be expensive and complicated to find and replace.

Types of Engine:

1. External combustion (E.C.) Engine

It is an engine in which combustion of fuel take place outside of the engine. In this type of engine heat, which is generated by burning of fuel is use to convert the water or other low boiling temperature fluid into steam. This high pressure steam used to rotate a turbine. In this engine we can use all solid, liquid and gases fuel. These engines are generally used in driving locomotive, ships, generation of electric power etc.

Advantages of E.C. engine-

  • In these engines starting torque is generally high.
  • Because of external combustion we can use cheaper fuels as well as solid fuel.
  • They are more flexible compare to internal combustion engines.

2. Internal Combustion (I.C.) Engine

It is an engine in which combustion of fuel take place inside the engine. When the fuel burns inside the engine cylinder, it generates a high temperature and pressure. This high pressure force is exerted on the piston (A device which free to moves inside the cylinder and transmit the pressure force to crank by use of connecting rod), which used to rotate the wheels of vehicle. In these engines we can use only gases and high volatile fuel like petrol, diesel. These engines are generally used in automobile industries, generation of electric power etc.

Advantages of I.C. engine-

  • It has overall high efficiency over E.C. engine.
  • These engines are compact and required less space.
  • Initial cost of I.C. engine is lower than E.C. engine.
  • This engine easily starts in cold because of it uses high volatile fuel.

Types of I.C. Engine


I.C. engine is widely used in automobile industries so it is also known as automobile engine. An automobile engine may be classified in many manners. Today I am going to tell you some important classification of an automobile engine.

According to number of stroke:

1.Two stroke engine

In a two stroke engine a piston moves one time up and down inside the cylinder and complete one crankshaft revolution during single time of fuel burn. This type of engine has high torque compare to four stroke engine. These are generally used in scooters, pumping sets etc.

2.Four stroke engine

In a four stroke engine piston moves two times up and down inside the cylinder and complete two crankshaft revolutions during single time of fuel burn. This type of engines has high average compare to two stroke engine. These are generally used in bikes, cars, truck etc.

What are the main parts of a car engine?

Car engines are built around a set of "cooking pots" called cylinders (usually anything from two to twelve of them, but typically four, six, or eight) inside which the fuel burns. The cylinders are made of super-strong metal and sealed shut, but at one end they open and close like bicycle pumps: they have tight-fitting pistons (plungers) that can slide up and down inside them. At the top of each cylinder, there are two valves (essentially "gates" letting things in or out that can be opened and closed very quickly). The inlet valve allows fuel and air to enter the cylinder from a carburetor or electronic fuel-injector; the outlet valve lets the exhaust gases escape. At the top of the cylinder, there is also a sparking plug (or spark plug), an electrically controlled device that makes a spark to set fire to the fuel. At the bottom of the cylinder, the piston is attached to a constantly turning axle called a crankshaft. The crankshaft powers the car's gearbox which, in turn, drives the wheels.

How does a four-stroke engine make power?

How the cylinder in a car engine makes power

Watch this animation and you'll see that a car engine makes its power by endlessly repeating a series of four steps (called strokes):

  1. Intake: The piston (green) is pulled down inside the cylinder (gray) by the momentum of the crankshaft (grey wheel at the bottom). Most of the time the car is moving along, so the crankshaft is always turning. The inlet valve (left) opens, letting a mixture of fuel and air (blue cloud) into the cylinder through the purple pipe.
  2. Compression: The inlet valve closes. The piston moves back up the cylinder and compresses (squeezes) the fuel-air mixture, which makes it much more flammable. When the piston reaches the top of the cylinder, the sparking plug (yellow) fires.
  3. Power: The spark ignites the fuel-air mixture causing a mini explosion. The fuel burns immediately, giving off hot gas that pushes the piston back down. The energy released by the fuel is now powering the crankshaft.
  4. Exhaust: The outlet valve (right) opens. As the crankshaft continues to turn, the piston is forced back up the cylinder for a second time. It forces the exhaust gases (produced when the fuel burned) out through the exhaust outlet (blue pipe).

The whole cycle then repeats itself.

How many cylinders does an engine need?

One problem with the four-stroke design is that the crankshaft is being powered by the cylinder for only one stage out of four. That's why cars typically have at least four cylinders, arranged so they fire out of step with one another. At any moment, one cylinder is always going through each one of the four stages—so there is always one cylinder powering the crankshaft and there's no loss of power. With a 12-cylinder engine, there are at least three cylinders powering the crankshaft at any time—and that's why those engines are used in fast and powerful cars.