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Compression of an internal combustion engine is the most important indicator of its overall condition and performance. Knowledge of the factors that contribute to its reduction is necessary to maintain optimal operation of the power unit.

Compression is assessed using a compression gauge consisting of a pressure gauge, a flexible hose with a threaded end, a check valve and an air release mechanism. Optimal compression values ​​vary depending on the engine characteristics specified by the manufacturers. Deviations from these values ​​indicate potential problems in the engine that require attention.

A clogged air filter can restrict air flow, resulting in reduced compression levels. Simply replacing the air filter can solve this problem. Overheating, insufficient lubrication or particle ingress can cause abrasions on the pistons and cylinder walls, reducing compression. Resolving these problems may include changing lubricants, adding additives, or performing a major overhaul. Timing belt failures can cause valves to become distorted, requiring repair or replacement.

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