Yes but you need a dental mirror and a flashlight. pull out the leading plugs and rotate the engine with a socket extention on the crank bolt, turn till you can see the seal pass by the spark plug hole, get a good look @ it, The seals should be very shiny, not dirty or carboned up, also if the comp is good you should get a sound of compression out the hole. Mkae sure you get 3 sounds per rotor as you rotate it slowly. add oil in the spark holes, and this will help it make more comp.