Used & Rebuilt Engine Assembly
What is an engine assembly?
An engine or a motor is a machine which converts one or more forms of energy into mechanical energy. The most commonly used engine in vehicles in the modern times is an IC engine or an internal combustion engine. An ICE is a heat engine in which combustion of a fuel occurs with the help of an oxidizer (usually air) in a combustion chamber. The expansion of high temperature and high pressure gases produced by combustion will apply direct force to some component of the engine. This force is typically applied to pistons, blades, turbine blades, a rotor or a nozzle and it will move the component over a distance, transforming chemical energy into kinetic energy which is used to propel, move or power whatever the engine is attached to.
The theory behind any reciprocating internal combustion engine is that if you put a tiny amount of any high energy density fuel, like gasoline, in a small and enclosed space and ignite it, then as a result, an incredible amount of energy is released in the form of expanding gas. Almost all vehicles with a gasoline engine use the four strokes combustion cycle or the Otto cycle to convert gasoline into motion. The four strokes of the four stroke combustion cycle are illustrated in the animation below –
The four strokes are intake stroke, compression stroke, combustion stroke and exhaust stroke. The piston is connected to the crankshaft by something called a connecting rod. As the crankshaft revolves, it will have the effect of a “resetting cannon”. The piston starts at the top, then the intake valve opens and the piston will move down to let the engine take in a cylinder full of air and gasoline. This is the intake stroke. Only a small drop of gasoline mixed with air is enough for this to work. Then the piston will move back up to compress this fuel and air mixture. Compression will make the explosion more powerful. When the piston will reach the top of its stroke, the spark plug will emit a spark to ignite the gasoline. The gasoline charge in the cylinder will then explode, driving the piston down. Once the piston hits the bottom of its stroke, the exhaust valve will open and the exhaust will leave the cylinder to go out the tailpipe.
The base of any reciprocating internal combustion engine is the engine block, which is generally made of cast iron or aluminum. The engine block typically contains the cylinder. In cases where the engine has more than one cylinder, they are arranged rows-one two or three-according to which kind of engine it is. On the outer side of the cylinder of a single cylinder vehicle, passages that contain cooling a fluid is cast into the engine block whereas, in vehicles with multiple cylinders, the passages are the kind of removable cylinder sleeves which can be replaced. The water cooled engines contains passages in the engine block where the cooling fluid circulates.
How to identify a faulty engine
Your engine is one of the most integral parts of your vehicle. It needs to be well oiled and maintained regularly to ensure smooth operation. No vehicle can function without its engine, thus it’s vital that you pay attention to warning signs for a possible failure.
The below five signs can help you identify the possibility of an engine malfunction –
1.Check Engine Light Is ON – This of ‘course is the most obvious sign of something being wrong with the engine. Studies show that about 30% of the people tend to ignore this warning. Needless to say, ignoring the check engine light is an extremely dangerous thing to do. If your check engine light is ON, your engine needs to be checked out by a mechanic immediately.
2.Smoke – If you notice thick smoke coming out of your car, the culprit is most likely your engine. In this case, your engine mostly would simply have reached the end of its lifespan and a simple replacement would do the trick.
3.Strange Noises – This is a very obvious and very big indicator that something is wrong with your engine and needs immediate attention from a mechanic. The most common cause of these loud knocking noises are when the engine bearings break down and leave all of those moving engine parts in danger of movement and damage.
4.High Fuel Consumption – If you start noticing that your car’s gas tank needs to be filled more often than normal, it means that your engine’s getting old and losing efficiency. Replacing your old engine with a new one is the best solution for these.
5.Stuttering And Stalling – If your engine is stuttering or stalling, it is an indication that the inner workings of the engine are no longer strong enough to keep the entire vehicle powered and moving without faltering. This is a rather dangerous problem to have since this could mean that your vehicle could stop at completely random and highly inconvenient and unsafe places. Thus, if these symptoms occur, it’s best to replace the engine as soon as possible.
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Mainland Auto Parts sells Used and Rebuilt engines for all major makes and model including
- Alfa Romeo
- Aston Martin
- LandRover Defender
- Mini Cooper
- Ram Promaster