Leak down test and a compression test

[Flathead]

The compression readings and the leak down percentages don't make sense for me. For example if you have 32% leakage you should not have a higher compression reading than a cylinder with 8% leakage. More leakage = less compression and less leakage = more compression. Something is off here.

[Jim Brierley]

Originally Posted by Flathead

The compression readings and the leak down percentages don't make sense for me. For example if you have 32% leakage you should not have a higher compression reading than a cylinder with 8% leakage. More leakage = less compression and less leakage = more compression. Something is off here.

Same here! Check for good spark at all 4, all cylinders are high enough in lbs. to make the engine run well, #1 is a little weak.