I have been told to perform a compression test on my leyland mini s but i dont know how!! Plz helpHow do I perform a compression test on a 1975 leyland mini s?when i do this i always do it the same way. 1. remove all the spark plugs so the engine will turn easy. 2. block open the trottle (stick a screwdriver handle into the thottlebody)this will prevent airflow resistance. 3. disable the ignition system to prevent sparks(remove the feed wire to the coil). 4. disable the fuel injection. 5. screw the gauge on with the right adapter in the sparkplug holes. 6. crank the engine and listen for about 5 compression strokes(the needle will move as this happans). 7. Write down the numbers and repeat these steps in all cylinders. if the test fails try adding a little oil to the cylinder and see if the rings are fried if not check head gaskets and valve seats and seals.How do I perform a compression test on a 1975 leyland mini s?Go to sears and get engine compression tester gauge. http://www.sears.com/shc/s/search_10153_鈥?/a> Then follow the direction in the box. simple. === Get the kind that screws in (not the kind that you hold in). Good luck...

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