Interpretation of tests of the automatic compression

Self-test and compression test cylinders, the simplest, easiest and faster way to assess the condition of the engine in a vehicle that can be done. At the top of the pressure test of a car faster, cheaper, and what one is “non-invasive”, which means that you have to disassemble half the engine.

However, many engineers are often inexperienced and nothing about the court interpretation of the results of compression tests.You may know how to do the whole test – but in reality, the significance of the results.

First – take your time and effort to compare the measured values ​​of compression with the specifications of vehicle manufacturers and specifications. These documents are in the manual, an online reference work on the grounds of the car or as a last resort, your neighborhood mechanic or service dealer. You should always be your values ​​within the allowable tolerances.

In the situation, and if your engine and show low compression readings. This is less than 100 psi (pounds per square inch) or, alternatively, high compression readings, then you can almost count on repair work, the possibility of internal engine may be necessary, and probably in the corner. When the pressure test was conducted as a standard in the assessment of routine maintenance, and they consider a car engine tuning, then it can be a good use of time and resources to this idea are laid aside.To work in a different vehicle.

If the reading is low or uneven pressure in a cylinder of the engine, “a mechanical trick is to add a tablespoon of oil through the spark plug holes in the affected cylinders and then check the compression. If the improvement in compression readings, then most likely case of that cylinder valves are likely to “stick” sitting wrong or incinerated. The owner of the chain of car dealerships experience, including experience in the practice of the automobile and Industry Automotive body shop says that the valves are bad your experience ten times more than the rings. If compression is low in two adjacent cylinders, cylinder head gaskets between cylinders are probably a word. alternatively high compression readings usually indicate an accumulation of carbon in the pressure chambers of the cylinders of the engine.

Finally, if the compression tests are done, turn the ignition key removed and any other instrument that has been made, or to open the position of the accelerator. Well, not only the full compression tests were completed, but also to understand a much better position and understand the importance and significance of the results.