Puristustestissä

Puristustestissä, often translated as "compression test" or "pressure test," is a diagnostic procedure used primarily in automotive mechanics to assess the condition of an internal combustion engine. The test involves measuring the pressure within each cylinder of the engine when it is rotated. This is typically done by removing the spark plugs, inserting a compression gauge into each spark plug hole, and then cranking the engine over for a specified number of revolutions.

The results of a puristustestissä indicate the engine's ability to seal its combustion chambers. A healthy engine will have consistent and within-spec compression readings across all cylinders. Low or inconsistent readings can point to several potential problems. These might include worn piston rings, damaged valves (intake or exhaust), a blown head gasket, or a cracked cylinder head or block. Conversely, excessively high readings could suggest carbon buildup on the piston tops or that the wrong type of oil is being used.

Performing a puristustestissä is a valuable step in troubleshooting engine performance issues such as misfires, loss of power, or poor fuel economy. It helps to isolate problems to specific cylinders or indicate a more general engine wear issue. The procedure is relatively straightforward but requires specific tools and an understanding of engine mechanics to interpret the results accurately. Mechanics will often compare the readings to the manufacturer's specifications for the particular engine model to determine the overall health and potential repair needs.