When it comes to purchasing a used car, experts advise buyers to check the engine’s compression ratio before making a decision. This is because the compression ratio indicates the engine’s ability to compress fuel before ignition, which is crucial for generating power.
Typically, a higher compression ratio results in greater engine power, more efficient fuel combustion, and reduced emissions. On the other hand, a lower compression ratio can lead to decreased engine power and impact the vehicle’s acceleration capabilities.
Additionally, unusual engine noises can make starting the car more challenging.
It’s essential to assess the quality of a used car engine before purchase. (Illustrative image)
To check the engine’s compression ratio, simply purchase a compression gauge from online marketplaces or automotive shops. Then, remove the engine’s spark plugs and place the gauge into each cylinder before turning on the ignition switch.
It’s important to test each cylinder individually and compare the readings with the specifications in the user manual. If the figures deviate by no more than 10% from the manufacturer’s data, it indicates that the engine is still functioning stably.
In cases where all cylinders show significantly lower compression ratios than the manufacturer’s specifications, it suggests that the internal engine components are worn out, and the risk of malfunction is high.
If only one or two cylinders have low compression ratios, buyers can consider purchasing the vehicle and then replacing the gasket or cylinder head to improve the compression ratio. While this may incur additional costs, it is still a better option than overhauling the entire engine.
According to VTC
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