friedkin Posted March 12, 2017 Share Posted March 12, 2017 I have a subaru legacy 1996 with 2.0 liter petrol engine, I ve made a cylinder compression ratio test today and here is the results, is it normally? passenger inner side ........ 170-175 psi passenger outer side ........ 170-175 psi driver outer side ................ 155-160 psi driver inner side ................ 150-155 psi motor type is EJ20E and I ve found an information about compres ratio of my vehicle, there says compression ratio is 9:00, accoding to my calculation, ratios is 180 psi normally, is it correct? here is link мотор-про.рф/products/16247602 Link to comment Share on other sites More sharing options...
doublechaz Posted March 12, 2017 Share Posted March 12, 2017 As the engine wears your compression test results will go down. We call it 'getting tired'. More important is that you don't want to pass 10% difference between the high and low number in your test. You are a little past this if we say you are 173 and 152. That means the engine won't run as smooth and won't make as much power. If you were considering rebuilding the engine this test would argue for the rebuild. If it serves your needs and you are trying to guess how long it will live, it should keep going as long as it isn't using a lot of oil or some other bigger propblem. Link to comment Share on other sites More sharing options...
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