The two main working parts of an engine are the engine block and the cylinder head. Oil and coolant passages run between the two, and the combustion chamber also lies…

One of the characteristics of a cooling system is that it has to operate close to the boiling point of water. The cooling system uses a mixture of water and…

An active secondary air injection system uses an electric or belt-driven pump to move air for injection into the exhaust stream. Most of the time, the system consists of a…

As an engine runs and transfers power to the wheels it vibrates and twists forcefully. Every engine has an arrangement of strong mounts to hold it in place in the…

If your engine overheats or is in the red area on the temperature gauge, your cooling fan may not be working properly. Cooling fans are fairly easy to test as…

The front crankshaft seal holds oil in at the front of the engine. The main reason to replace a front crank seal is if it is the source of an…

An engine pulls air in through the air filter, flowing through the intake tube and then, the throttle body. From there, it goes into the intake manifold which splits it…

An idle air control valve controls the idle speed of an engine by managing the amount of air allowed into the engine when the throttle is closed. Typically, it is…

The oil pressure sensor tells the PCM how much oil pressure the engine has. There are two main types of sensors. The first measures the pressure on a graduated scale…