Originally Posted by mdb205
How would I do a wet/dry comparison?
Easy. Pull the plugs, and do a normal compression test, write down the results. That's dry. Now do it again, only before each cylinder, put a couple of good squirts of motor oil in each cylinder. Write the results on the same page. If the results from the first test are high and in spec, the second should be slightly higher, also in spec. If the first test had low cylinders, and they went up for the second, you have a ring problem. If they did not go up much in the second, you have a valve problem.