What is Engine Diagnose? Engine Diagnose is a free website that offer free Automotive Repair guide to help mechanic and people in general to fix their car. They will learn how to diagnose an engine problem, rebuild a transmission, change suspension parts, how to test sensor components, diagnose smoke condition, diagnose noise condition etc…
Also we provide ASE practice for people who are becoming mechanics. We make practice test frequently so you can have plenty of content to learn. We offer multiple choice questions for you to choose. We also provide guides how to take the ASE test and what you should expect.
In addition, on Engine Diagnose, we post OBD II codes so you can look up for potential problems. All you need is an OBD II scanner on hand and once you have found the code, just refer back to this site. We also offer common vehicle codes and generic codes that is on any vehicle post 1996 and up.
We recommend that you should bookmark this website as we have auto mechanics ready to post new content each and everyday. We provide the greatest automotive content on the web.
How an engine work
An engine is a mechanical power house and it is used to power a car. The function of an engine is to intake air, fuel and spark to create a combustion. The combustion is used to rotate a mechanical crankshaft which therefore is used for power. The potential energy of the air and fuel is converted to kinetic energy. An engine has many different function and can be used to generate electricity, propel an object like a car, or used to power home use like a lawn power.
Air, Fuel and Spark for combustion
The main component in air is oxygen that the engine breathe. Without oxygen the fuel cannot burn. Fuel is highly combustible and is rich in carbon. Naturally, it has high octane and is favorable to use as fuel since it is cheap and high in carbon. Spark is used to trigger the air and fuel therefore causing an explosion. All these three elements are combine to create a perfect environment to power an engine.
Four main stroke of an engine
Intake stroke: During the intake stroke, the piston moves downward to creates a vacuum and suck the air and fuel into the engine chamber. Both intake valve is open and exhaust valve is closed.
Compression stroke: Once air and fuel is sitting in the chamber it is ready for compression. The intake valves and exhaust valves are both closed. The piston moves upward compressing the air and fuel.
Power stroke: Since the air and fuel is compressed it is ready to be ignited. The spark plug fires a spark and ignite the mixture. This causes and explosion and moves the piston downward. The piston then rotates a crankshaft which causes a movement. The movements is converted into mechanical energy and energy is transferred to the transmission.
Exhaust stroke: After the combustion, it is ready to expel the combustion left over which is mainly made of carbon dioxide. The exhaust valve is opened while the intake valve is still closed.
Combustion energy is converted to transmission
During the four stroke, the crankshaft is constantly moving in a 360 degree motion. The movement is used to transfer to the transmission. The transmission contains many gears that are used to maximize energy. Torque is the main part here that will help move a car forward. The transmission is now ready to power the wheels.
Different types of engine
There are many different types of engine. There are the early steam engine that was used to power a ship and simple cars. There are also the typical piston engine that are used for cars, lawnmower etc… and there are also rotary engine that has a different designed that is used for planes and cars. Many of these are used for the automotive industry, avian industry, marine industry, industrial industry, and home. Whatever it may be used for, engine will always be around.
Hearing a click after turning a key:
The battery should have sufficient power to power a starter. Usually a no click sound and engine not turning is a result of a battery not having enough power. Take out a voltmeter or a multimeter and set to the voltage setting. Check the voltage and reading should be no less than 12.4 volts and a minimum should be at 12.6 volts.
Check battery connection
Like most electronic component require electrical current to run. A starter needs a minimum amount of power to run. But what if the starter is not receiving enough power? Check the battery connection and its condition to see if it may be a problem. The battery connection and terminal should be free of corrosion and should be snugged tight on its fitting. If the fitting is loose, tightening it up with a wrench or ratchet. Another worth mentioning is checking the cable and its condition. A worn cable should be replaced since it blocks the current from flowing properly.
