According to Automotive Training Centre:
To “blow a gasket” is a common expression people like to throw around to mean that something has burst. Usually, when it’s used to describe someone’s behaviour, it means they’re having a meltdown or fit of anger. In the automotive world, blowing a gasket can have a similar effect mechanically, causing the vehicle to breakdown or even sustain permanent damage. Each car has many types of gaskets, with each serving the function of either sealing off an area in the engine compartment to prevent fluids from leaking, maintaining constant internal pressure, or preventing debris from entering the engine.
Understanding more about gasket types is important for aspiring auto mechanics, who will often be tasked with gasket repair work to ensure optimal engine performance. To understand more about the most common gasket types you’ll see on the job, let’s take a closer look!
The cylinder head gasket, also sometimes referred to simply as the “head gasket,” is one of the most important types those with automotive careers become acquainted with. Located between the vehicle’s engine block or camshaft pulley and cylinder head, this copper gasket provides a crucial seal between these two very important components. By preventing combustion gases from entering the coolant system, the head gasket ensures maximum compression to prevent engine failure.
The automotive mechanic can expect to encounter two types of exhaust gaskets in a vehicle, each of equal importance:
This crucial gasket acts as a seal for the engine coolant and vacuum, preventing air from escaping during the combustion process and regulating temperature within the chamber. These combined functions serve to ensure a correct balance of oxygen in the vehicle’s fuel mixture, required to achieve optimal engine performance.
A few other gasket types are worth mentioning, as they are also commonly worked on by mechanics in the repair shop. The rubber camshaft gasket, sometimes referred to by pros as the “cam seal,” serves a key function by preventing oil leaks from the camshaft while simultaneously preventing unwanted debris from entering this vital component. The main bearing gasket located at the engine’s rear ensures oil remains in the pan while the crankshaft revolves. Finally, the oil storage pan located beneath the engine block needs a gasket of its own too, to prevent oil from leaking as it makes its way to and from the pan to keep the engine and its parts well lubricated.
As you can see, all of the above gaskets serve an important role in ensuring a vehicle’s fluids and fumes remain flowing where they should. When these gaskets “blow,” the driver will usually feel the results rather quickly through an underperforming engine. Luckily, if caught quickly enough, a damaged gasket can often either be repaired or replaced by a trained mechanic to get an affected vehicle back up in good running condition.
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