A term that describes Blow By is a situation where a leak occurs due to high pressure. This can happen on any machine. However, most cases of Blow By occur in diesel engines.
This can be attributed to the very high compression of the diesel engine. For example, this could happen to the Hyundai Santa Fe which has engine compression up to 16:1 on the diesel variant, if there is minimal maintenance.
Blow By by definition is when gas from the combustion chamber enters the crank area because the piston ring does not seal perfectly. But this is actually normal, there are no piston rings capable of sealing the gas 100% so that it does not enter the crankshaft chamber.
Actually, There is special ventilation in the crankshaft space, namely Positive Crankshaft Ventilation (PCV). The aim is to remove gas from the crankshaft area so that the engine is not burdened.
However, if the car is poorly maintained and the piston rings start to wear out, besides the oil starting to burn, Combustion chamber gas will also enter the engine room. The result, power may decrease.
Therefore, It's a good idea to always carry out service and maintenance on your car, The main thing is to change the oil regularly at the right time.
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